2016950530Aerodynamic and Thermal Characteristics of a Hot Jet in Parallel Flow22This paper presents an experimental investigation of the aerodynamic and thermal characteristics of a round jet of hot air, injected through a nozzle into a parallel air flow, simulating a hot streak. Experiments were performed by imposing the same total pressure, established by means of a five-hole probe, for the mainstream and the jet at nozzle exit. Time-averaged temperatures at different points over planes downstream of the nozzle exit section were measured by thermocouple rakes. Experimental data, presented in a non-dimensional form, provide a representation not correlated to individual maximum jet temperature and Reynolds number, in the respective fields of variation. The attenuation of the hot jet strength is reported as a function of the normalized axial coordinate for the various operating conditions considered. Results obtained for the hot jet discharged into a parallel flow are compared with data obtained for the hot jet spreading into stagnant air.21052110F.SattaDIME, Università degli Studi di Genova, via Montallegro 1, I-16145, Genova, ItalyDIME, Università degli Studi di Genova, via Montallegro 1, I-16145, Genova, Italypaysfrancesca.satta@unige.itG.TandaDIME, Università degli Studi di Genova, via Montallegro 1, I-16145, Genova, ItalyDIME, Università degli Studi di Genova, via Montallegro 1, I-16145, Genova, Italypaysgiovanni.tanda@unige.itHot jet Hot streak Temperature profile.[Abdel-Rahman, A. (2010). A review of effects of
initial and boundary conditions on turbulent
jets. WSEAS Transactions on Fluid Mechanics
4, 257−275.##
Abramovich, G. N. (2013). The Theory of Turbulent
Jets, MIT Press.##
Bejan, A. (2013). Convection Heat Transfer, 4th ed.,
John Wiley and Sons.##
Carlomagno, G. M. and A. Ianiro (2014). Thermofluid-
dynamics of submerged jets impinging at
short nozzle-to-plate distance: A review.
Experimental Thermal and Fluid Science 58,
15−35.##
Jenkins, S., K. Varadarajan and D. G. Bogard
(2004). The effect of high mainstream
turbulence and turbine vane film cooling on
the dispersion of a simulated hot streak. ASME
Journal of Turbomachinery 126, 203−211.##
Jenkins, S. C. and D. G. Bogard (2005). The effects
of the vane and mainstream turbulence level on
hot streak attenuation. ASME Journal of
Turbomachinery 127, 215−221.##
Jenny, P., C. Lenherr, R. S. Abhari and A. Kalfas
(2012). Effect of hot streak migration on
unsteady blade row interaction in an axial
turbine. ASME Journal of Turbomachinery
134, 051020.##
Margason, R. J. (1993). Fifty years of jet in crossflow
research. In: AGARD−CP 534, 1−41.
Mi, J., M. Xu and T. Zhou (2013). Reynolds
number influence on statistical behaviours of
turbulence in a circular free jet. Physics of
Fluids 25, 075101.##
Pleasniak, M. W. and D. M. Cusano (2005). Scalar
mixing in a confined rectangular jet in
crossflow. Journal of Fluid Mechanics 524,
1−45.##
Qureshi, I., A. D. Smith, K. S. Chana and T. Povey
(2012). Effect of temperature nonuniformity on
heat transfer in an unshrouded transonic hp
turbine: an experimental and computational
investigation. ASME Journal of Turbomachinery
134, 011005.##
Wilson, R. A. M. and V. Danckwerts (1964).
Studies in turbulent mixing-ii. A hot-air jet.
Chemical Engineering Science 19, 885−895.##]Aerodynamic Optimization of Micro Aerial Vehicle22Computational fluid dynamics (CFD) study was done on the propeller design of a micro aerial vehicle (quadrotor-typed) to optimize its aerodynamic performance via Shear Stress Transport K-Omega (SST k-ω) turbulence model. The quadrotor model used was WL-V303 Seeker. The design process started with airfoils selection and followed by the evaluation of drone model in hovering and cruising conditions. To sustain a 400g payload, by Momentum Theory an ideal thrust of 5.4 N should be generated by each rotor of the quadrotor and this resulted in an induced velocity of 7.4 m/s on the propeller during hovering phase, equivalent to Reynolds number of 10403 at 75% of the propeller blade radius. There were 6 propellers investigated at this Reynolds number. Sokolov airfoil which produced the largest lift-to-drag ratio was selected for full drone installation to be compared with the original model (benchmark). The CFD results showed that the Sokolov propeller generated 0.76 N of thrust more than the benchmark propeller at 7750 rpm. Despite generating higher thrust, higher drag was also experienced by the drone installed with Sokolov propellers. This resulted in lower lift-to-drag ratio than the benchmark propellers. It was also discovered that the aerodynamic performance of the drone could be further improved by changing the rotating direction of each rotor. Without making changes on the structural design, the drone performance increased by 39.58% in terms of lift-to-drag ratio by using this method.
21112121S. P.YeongMechanical Engineering Department, Curtin University, Miri, Sarawak, 98009, MalaysiaMechanical Engineering Department, Curtin University, Miri, Sarawak, 98009, Malaysiapaysyeong.siew.ping@postgrad.curtin.edu.myS. S.DolPetroleum Engineering Department, Curtin University, Miri, Sarawak, 98009, MalaysiaPetroleum Engineering Department, Curtin University, Miri, Sarawak, 98009, Malaysiapayspremiumvillage@gmail.comAerodynamics Airfoil CFD Lift-to-drag ratio Quadrotor Sokolov.[Corrêa, A., F. Medina, T. de Paula Sales, D. Alves
Rade and F. José de Souza (2014). Study of the
Flow over an Oscillating Naca0012 Airfoil.##
Dol, S. S. (2013). Weakened Vortex Shedding from
a Rotating Cylinder. International Journal of
Mechanical, Aerospace, Industrial,
Mechatronic and Manufacturing Engineering
7(10), 1679-1686.##
Dol, S. S., G. A. Kopp and R. J. Martinuzzi (2008).
The suppression of periodic vortex shedding
from a rotating circular cylinder. Journal of
Wind Engineering and Industrial
Aerodynamics 96(6), 1164-1184.##
Eleni, D. C., I. A. Tsavalos and P. D. Margaris
(2012). Evaluation of the Turbulence Models
for the Simulation of the Flow over a National
Advisory Committee for Aeronautics (Naca)
0012 Airfoil. Journal of Mechanical
Engineering Research 4(3), 100-111.##
Gamble, D. E. and A. Arena (2009). Automated
Dynamic Propeller Testing at Low Reynolds
Numbers. Oklahoma State University.##
Gudmundsson, S. (2014). Chapter 14 - the Anatomy
of the Propeller. In General Aviation Aircraft
Design, ed. Snorri Gudmundsson 581-659.##
Hanford, S. D., Lyle N. L. and J. F. Horn (2005). A
Small Semi-Autonomous Rotary-Wing
Unmanned Air Vehicle (UAV). AIAA2005-
7077.##
Hardi, P. and R. Schlichenmaier (2005).
Introduction to Hydrodynamics. Freiburg.##
Pinkerton, R. M (1938). The variation with
Reynolds number of pressure distribution over
an airfoil section 613.##
Tracy, I. P. (2011). Propeller Design and Analysis
for a Small, Autonomous UAV. Massachusetts
Institute of Technology.##
Yahya, S. M. (2010). Turbines Compressors and
Fans: Tata McGraw-Hill Education.##
Yeong, S. P., L. M. King and S. S. Dol (2015). A
Review on Marine Search and Rescue
Operations Using Unmanned Aerial Vehicles.
International Journal of Mechanical,
Aerospace, Industrial, Mechatronic and
Manufacturing Engineering 9(2), 390-393.##
Yogianandh, N., R. Stopforth and G. Bright (2011).
Quad-Rotor Unmanned Aerial Vehicle
Helicopter Modelling and Control. Int J Adv
Robotic Sy 8(4), 139-149.##]Electrothermal Instability in a Porous Medium Layer Saturated by a Dielectric Nanofluid22The onset of convection in a porous medium saturated by a dielectric nanofluid with vertical AC electric field is investigated. The flux of volume fraction of a nanoparticle with the effect of thermophoresis is taken to be zero on the boundaries and the eigenvalue problem is solved using the Galerkin method. The model used for nanofluid incorporates the combined effect of Brownian diffusion, thermophoresis and electrophoresis, while for porous medium Darcy model is employed. The results show that increase in the AC electric Rayleigh-Darcy number, the Lewis number, the modified diffusivity ratio and the concentration Rayleigh-Darcy number are to hasten the onset of convection. The size of convection cells does not depend on nanofluid parameters, but decreases with increasing the AC electric Rayleigh-Darcy number. The non-existence of oscillatory convection is also obtained.21232132D.YadavSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South KoreaSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South Koreapaysdhananjayadav@gmail.comJ.LeeSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South KoreaSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South Koreapaysjinleeyon5@gmail.comH. H.ChoSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South KoreaSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South Koreapayshchoyounsei123@gmail.comPorous medium Nanofluids Electrohydrodynamic instability Brownian motion and thermophoresis. [Agarwal, S., P. Rana and B. S. Bhadauria (2014).
Rayleigh-Bénard convection in a nanofluid
layer using a thermal non-equilibrium
model. Journal of Heat Transfer 136,
122501.##
Asadzadeh, F., M. N. Esfahany and N. Etesami
(2012). Natural convective heat transfer of
Fe3O4/ethylene glycol nanofluid in electric
field. International Journal of Thermal
Sciences 62, 114–119.##
Awasthi, M. K., D. Yadav and G. S. Agrawal
(2014). Viscous potential flow analysis of
electrohydrodynamic Rayleigh-Taylor
instability. Journal of Applied Fluid
Mechanics 7, 209-216.##
Buongiorno, J. (2006). Convective transport in
nanofluids. ASME J. Heat Transf. 128, 240–
250.##
Choi, S. (1995). Enhancing thermal conductivity
of fluids with nanoparticles. ASME New
York 66, 99–105.##
El-Sayed, M. F., G. M. Moatimid and T. M. N.
Metwaly (2011). Nonlinear
electrohydrodynamic stability of two superposed
streaming finite dielectric fluids in
porous medium with interfacial surface
charges. Transp. Porous Med. 86, 559–578.##
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Electrodynamics of Continuous Media.
Pergamon Press, London.##
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(1996). Electric alternating current effects
on flow of oil and water in porous media,
Proceedings of the International Conference
on Porous Media and Their Applications in
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Porous Media. Springer.##
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Thermal instability in a porous medium
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Mass Transf 52, 5796–5801.##
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of convection with internal heating in a
porous medium saturated by a nanofluid.
Transp. Porous Med 99, 73-83.##
Nield, D. A. and A. V. Kuznetsov (2014).
Thermal instability in a porous medium
layer saturated by a nanofluid: A revised
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211–214.##
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Binary Nanofluid Saturated Rotating Porous
Layer. Journal of Nanofluid 4, 59-65.##
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convection. Q. J. Mech. Appl. Math. 22,
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thermal modulation on the onset of
electrothermoconvection in a dielectric fluid
saturated porous medium. ASME J. Heat
Transf. 131, 101009–101015.##
Saidur, R., K. Y. Leong and H. A. Mohammad
(2011). A review on applications and
challenges of nanofluids. Renewable and
Sustainable Energy Reviews 15, 1646-1668.##
Sheikholeslami, M and D. D. Ganji (2015b).
Nanofluid flow and heat transfer between
parallel plates considering Brownian motion
using DTM. Comput. Methods Appl. Mech.
Engrg. 283, 651-663.##
Sheikholeslami, M and S. Abelman (2015a). Two
phase simulation of nanofluid flow and heat
transfer in an annulus in the presence of an
axial magnetic field. IEEE Transactions on
Nanotechnology 14, 561-569.##
Sheikholeslami, M, M .Gorji-Bandpay and S.
Soleimani (2013). Two phase simulation of
nanofluid flow and heat transfer using
heatline analysis. International
Communications in Heat and Mass Transfer
47, 73-81.##
Shivakumara, I. S., M. Dhananjaya and O. C. Ng
(2015). Thermal convective instability in an
Oldroyd-B nanofluid saturated porous layer.
International Journal of Heat and Mass
Transfer 84, 167-177.##
Shivakumara, I. S., O. C. Ng and M. S. Nagashree
(2011). The onset of electrothermoconvection
in a rotating Brinkman porous layer.
International Journal of Engineering Science
49, 646–663.##
Tzou, D. Y. (2008b). Instability of nanofluids in
natural convection. ASME J. Heat Transf.
130, 372–401.##
Tzou, D.Y. (2008a). Thermal instability of
nanofluids in natural convection. Int. J. Heat
Mass Transf. 51, 2967–2979.##
Umavathi, J. C., D. Yadav and M. B. Mohite
(2015). Linear and nonlinear stability
analyses of double-diffusive convection in a
porous medium layer saturated in a Maxwell
nanofluid with variable viscosity and
conductivity. Elixir Mech. Engg 79, 30407-
30426.##
Wang, X. Q. (2007). Heat transfer characteristics
of nanofluids: a review. Int. J. Therm. Sci.
46, 1–19.##
Wong, K. V. and O. D. Leon (2010).
Applications of nanofluids: Current and
Future. Advances in Mechanical
Engineering.##
Yadav, D. (2014b). Hydrodynamic and
Hydromagnetic Instability in Nanofluids,
Lambert Academic Publishing Germany.
Yadav, D. and J. Lee (2016a). The onset of
convection in a nanofluid layer confined
within a Hele-Shaw cell. Journal of Applied
Fluid Mechanics 9(2), 519-527.##
Yadav, D., J. Lee and H. H. Cho (2016b).
Throughflow and quadratic drag effects on
the onset of convection in a Forchheimerextended
Darcy porous medium layer
saturated by a nanofluid. Journal of the
Brazilian Society of Mechanical Science and
Engineering.##
Yadav, D., D. Nam and J. Lee (2016c).The
onset of transient Soret-driven MHD
convection confined within a Hele-Shaw
cell with nanoparticles suspension. Journal
of the Taiwan Institute of Chemical
Engineers 58, 235-244.##
Yadav, D., J. Wang, R. Bhargava, J. Lee and H.
H. Cho (2016d). Numerical investigation of
the effect of magnetic field on the onset of
nanofluid convection. Applied Thermal
Engineering 103, 1441-1449.##
Yadav, D., D. Lee, H.H. Cho and J. Lee (2016e).
The onset of double-diffusive nanofluid
convection in a rotating porous medium
layer with thermal conductivity and
viscosity variation: A revised model.
Journal of Porous Media 19, 31-46.##
Yadav, D., J. Lee and H. H. Cho (2015a).
Brinkman convection induced by purely
internal heating in a rotating porous medium
layer saturated by a nanofluid. Powder
Technology 286, 592-601.##
Yadav, D. and J. Lee (2015b). The effect of local
thermal non-equilibrium on the onset of
Brinkman convection in a nanofluid
saturated rotating porous layer. Journal of
Nanofluids 4, 335-342.##
Yadav, D. and J. Lee (2015c). The onset of MHD
nanofluid convection with Hall current
effect. European Physical Journal Plus 130,
162-184.##
Yadav, D. and M. C. Kim (2014d). The effect of
rotation on the onset of transient Soretdriven
buoyancy convection in a porous
layer saturated by a nanofluid. Microfluidics
and Nanofluidics 17, 1085-1093.##
Yadav, D. and M. C. Kim (2015d). The onset of
transient Soret-driven buoyancy convection
in nanoparticle suspensions with particle
concentration dependent viscosity in a
porous medium. Journal of Porous Media
18, 369-378.##
Yadav, D., C. Kim, J. Lee and H. H. Cho
(2015e). Influence of magnetic field on the
onset of nanofluid convection induced by
purely internal heating. Computers and
Fluids 121, 26-36.##
Yadav, D., G. S. Agrawal and R. Bhargava
(2011). Thermal instability in rotating
nanofluid. International Journal of
Engineering Science 49, 1171–1184.##
Yadav, D., G. S. Agrawal and R. Bhargava
(2012). Boundary and internal heat source
effects on the onset of Darcy-Brinkman
convection in a porous layer saturated by
nanofluid. International Journal of Thermal
Sciences 60, 244-254.##
Yadav, D., G. S. Agrawal and R. Bhargava
(2013b). The onset of double diffusive
nanofluid convection in a layer of a
saturated porous medium with thermal
conductivity and viscosity variation. J.
Porous media 16, 105–121.##
Yadav, D., R. Bhargava and G. S. Agrawal
(2013a). Thermal instability in a nanofluid
layer with vertical magnetic field. J. Eng.
Math. 80, 147–164.##
Yadav, D., R. Bhargava, G. S. Agrawal, G. S.
Hwang, J. Lee and M. C. Kim (2014c).
Magneto-convection in a rotating layer of
nanofluid. Asia-Pacific Journal of Chemical
Engineering 9, 663–677.##
Yadav, D., R. Bhargava, G. S. Agrawal, N. Yadav,
J. Lee and M. C. Kim (2014a). Thermal
instability in a rotating porous layer saturated
by a non-Newtonian nanofluid with thermal
conductivity and viscosity variation.
Microfluid Nanofluid 16, 425–440.##]Research on the Aerodynamic Lift of Vehicle Windshield Wiper22Currently, research on the aerodynamic lift of vehicle windshield wipers is confined to the steady results, and there are very few test results. In the face of this truth, a wind tunnel test is conducted by using the Multipoint Film Force Test System (MFF). In this test, the aerodynamic lift of four kinds of wiper is measured at different wind speeds and different rotation angles. And then, relevant steady-state numerical simulations are accomplished and the mechanism of the aerodynamic lift is analyzed. Furthermore, combined with dynamic meshing and user-defined functions (UDF), transient aerodynamic characteristics of wipers are obtained through numerical simulations. It is found that the aerodynamic lift takes great effect on the stability of wipers, and there is maximum value of the lift near a certain wind speed and rotation angle. The lift force when wipers are rotating with the free stream is less than steady, and the force when rotating against the free stream is greater than steady.21332140G.ZhengqiState Key Laboratory of Advanced Design and Manufacture for Vehicle Body of Hunan University, Changsha, Hunan, 410082, ChinaState Key Laboratory of Advanced Design and Manufacture for Vehicle Body of Hunan University, Changsha, Hunan, 410082, Chinapays187351585@qq.comC.ZhenState Key Laboratory of Advanced Design and Manufacture for Vehicle Body of Hunan University, Changsha, Hunan, 410082, ChinaState Key Laboratory of Advanced Design and Manufacture for Vehicle Body of Hunan University, Changsha, Hunan, 410082, Chinapayschenzhen88@hnu.edu.cnT.PengState Key Laboratory of Advanced Design and Manufacture for Vehicle Body of Hunan University, Changsha, Hunan, 410082, ChinaState Key Laboratory of Advanced Design and Manufacture for Vehicle Body of Hunan University, Changsha, Hunan, 410082, Chinapayschenzhen1988520@163.comWindshield wiper Aerodynamic lift Wind tunnel test Dynamic mesh UDF.[Ali, Z., N. Amin, Z. M. Z. Mohd and R. A. B. Abd
(2013). Practical multi-objective controller for
preventing noise and vibration in an
automobile wiper system. Swarm and
Evolutionary Computation 8, 54-68.##
Anderson, M. (1903). Window-cleaning device.
Patent No. 743,801, United State Patent Office.##
Bayraktar, S. (2014). Numerical solution of threedimensional
flow over angled backward-facing
step with raised upper wall. Journal of Applied
Fluid Mechanics 7(1), 155-167.##
Dongki, M., J. Seongbin, H. Y. Hong, K. Heewon
and P. Junhong (2014). Experimental
investigation of vehicle wiper blade's squeal
noise generation due to windscreen waviness.
Tribology International 80, 191-197.##
Frédéric, B., B. Roland, L. Vincent, P. Maria, L.
Sophie, C. Viola and C. Michèle (2014).##
Measuring the effect of the rainfall on the
windshield in terms of visual performance.
Accident Analysis and Prevention 63, 83-88.##
Gaylard, A., A. C. Wilson and G. S. J. Bambrook
(2006, October). A quasi-unsteady description
of windscreen wiper induced flow structures.
6th MIRA International Conference on Vehicle
Aerodynamics, Gaydon, United Kingdom.##
Ha, J. S., T. K. Kim, K. H. Kim, K. W. Kim and Y.
K. Chang (2013). A study on the lift
characteristics according to the change of blade
angle in car wiper. Journal of Korean Society
of Mechanical Technology 15(1), 27-31.##
Harashima, M., A. Masuda and S. Imamura (1997).
Effect of fin on the wiper lift characteristics in
high-speed. Journal of the Visualization
Society of Japan 17(2), 19-22.##
Howard, R. J. A. and M. Pourquie (2002). Large
eddy simulation on the Ahmed reference
model. Journal of Turbulence 3(12), 1-18.##
Hucho, W. (1986). Aerodynamics of Road Vehicles
(First Edition). Cambridge University Press,
Cambridge, UK.##
Lin, C. F., M. F. Hung, C. Y. Tseng, C. H. Tsai, C.
H. Tai and C. C. Lan (2005). Numerical
investigation of aerodynamic effects on
windshield wiper. Journal of Technology
20(4), 325-332.##
Mehrez, Z., M. Bouterra, A. E. Cafsi, A. Belghith
and P. L. Quéré (2010). Simulation of the
periodically perturbed separated and
reattaching flow over a backward-facing step.
Journal of Applied Fluid Mechanics 3(2), 1-8.
Michael, P. U., and A. H. Klaus (2009).##
Computations of Turbulent Flow over an
Aircraft Windshield Wiper Model. AIAA
Journal 2009-3977.##
Philippe, B., J. Sébastien, and M. Frédéric (2001).
Simulation of aerodynamic uplift
consequences on pressure repartition –
application on an innovative wiper blade
design. SAE Paper 2001-01-1043.##
Sakoda, Nakagawa and Kameyama (1986).
Visualization technology of automobile
aerodynamic. Flow Visualization 6(21), 256-
274.##
Sanon, A. and S. Jallet (2003). Acoustic sources
localization: Application to wiper aerodynamic
noises. SAE Paper 2003-01-1700.##
Sébastien, J., D. Sylvain, M. Daniel, S. Jean, M.
Frédéric and D. Thomas (2001). Numerical
simulation of wiper system aerodynamic
behavior. SAE Paper 2001-01-0036.##
Seung, H. L., W. L. Sung, H. L. Sang, N. C. Woo
and H. S. Jin (2011). Numerical study on
aerodynamic lift on windshield wiper of highspeed
passenger vehicles. Transactions of the
KSME—B 35(4), 345-352.##
Shibata and Sakoda (1979). Research on the
automobile wipers floating. Automobile
Technology Academic Lectures 791, 124-156.##
Takada, K., T. Komoriya and Y. Furugori (2003).
Numerical simulation of wiper blade uplifting
on high speed traveling. The Japan Society of
Mechanical Engineers 38, 38-39.##
Toshikazu, S., S. Masanori and N. Kunio (1983). A
study on aerodynamic characteristics of
passenger cars. SAE Paper 1983-11-07.##
Tsunoda (1984). The aerodynamic characteristics of
automobile wipers. Automobile Technology
Academic Lectures 842, 039-052.##
Walter, W. C., K. Steve, D. Thomas, G. H. Daryl
and J. Sébastien (2007). Wiper blade assembly
and method of forming the same. Pub. No.: US
2007/0017056 A1, Patent Application
Publication, United States.##
Wang, Y., Y. Xin, Z. Q. Gu, S. H. Wang, Y. Deng
and X. Yang (2014). Numerical and
experimental investigations on the
aerodynamic characteristic of three typical
passenger vehicles. Journal of Applied Fluid
Mechanics 7(4), 659-671.##
Yang, Z. G., X. M. Ju and Q. L. Li (2011).
Numerical analysis on aerodynamic forces on
wiper system. Recent Progress in Fluid
Dynamics Research 1376, 213-217.##
Zhang, J. H. (2010). Numerical simulation of the
aerodynamic wiper on high-speed locomotives
based on FLUENT. Ph. D. thesis, Southwest
Jiaotong University, Cheng Du, China.##]Stability of Unsteady Mixed Convection in a Horizontal Concentric Annulus22In this study, stability of unsteady mixed convection in a horizontal annulus between two concentric cylinders was investigated numerically. The surfaces of the cylinders were considered to be at fixed temperatures and it was assumed that the hot inner cylinder is rotating at a constant angular velocity. The buoyancy forces were formulated utilizing the Boussinesq approximation. The governing equations of fluid flow and heat transfer in the annulus were solved with a finite element method for different values of the geometric (radius ratio) and transport parameters (Rayleigh number and Reynolds number). Development of the convective flow and heat transfer was expressed by the average Nusselt number for the outer cylinder. The results show that, for a narrow gap annulus, convective flow induces flow bifurcation and becomes unstable for high values of the Rayleigh number. Flow becomes more unstable with an increase in the Reynolds number. For a wide gap annulus, flow is stable for all values of the Rayleigh number if the rotation effects are small. On the other hand, convective flow becomes unstable for the modest and high values of the Ra number with an increase in the Re number.21412147K.KahveciTrakya University, Department of Mechanical Engineering, 22180 Edirne, TurkeyTrakya University, Department of Mechanical Engineering, 22180 Edirne, Turkeypayskamilk@trakya.edu.trMixed convection Concentric annulus Stability Bifurcation Nusselt number Rayleigh number.[Abu-Nada, E., Z. Masoud and A. Hijazi (2008).
Natural convection heat transfer enhancement
in horizontal concentric annuli using
nanofluids. International Communications in
Heat and Mass Transfer 35, 657–665.##
Ashorynejad, H. R., A. A. Mohamad and M.
Sheikholeslami (2013). Magnetic field effects
on natural convection flow of a nanofluid in a
horizontal cylindrical annulus using Lattice
Boltzmann method. International Journal of
Thermal Sciences 64, 240-250.##
Choi, J. Y. and M.-U. Kim (1995). Threedimensional
linear stability of mixed
convective flow between rotating horizontal
concentric cylinders. International Journal of
Heat and Mass Transfer 38(2), 275-285.##
Chung, J. D., C.-J. Kim, H. Yoo and J. S. Lee
(1999). Numerical investigation on the
bifurcative natural convection in a horizontal
concentric annulus. Numerical Heat Transfer,
Part A: Applications 36(3), 291–307.##
Fattahi, E., M. Farhadi and K. Sedighi (2010).
Lattice Boltzmann simulation of natural
convection heat transfer in eccentric annulus.
International Journal of Thermal Sciences
49(1), 2353-2362.##
Khanafer, K. and A. J. Chamkha (2003). Mixed
convection with in a porous heat generating
horizontal annulus. International Journal of
Heat and Mass Transfer 46(10), 1725-1735.##
Kuehn, T. H. and R. Goldstein (1978). A parametric
study of Prandtl number and diameter ratio
effects on natural convection heat transfer in
horizontal cylindrical annuli. Journal of Heat
Transfer 102(4), 768–770.##
Kuehn, T. H. and R. J. Goldstein (1976a).
Correlating equations for natural convection
heat transfer between horizontal circular
cylinders. International Journal of Heat and
Mass Transfer 19(10), 1127–1134.##
Kuehn, T. H. and R. J. Goldstein (1976b). An
experimental and theoretical study of natural
convection in the annulus between horizontal
concentric cylinders. Journal of Fluid
Mechanics 74(4), 695-719.##
Shaija, A. and G. S. V. L. Narasimham (2009).
Effect of surface radiation on conjugate natural
convection in a horizontal annulus driven by
inner heat generating solid cylinder.
International Journal of Heat and Mass
Transfer 52(5-6), 5759–5769.##
Yang, L. and B. Farouk (1992). Three-dimensional
mixed convection flows in a horizontal
annulus with a heated rotating inner circular
cylinder. International Journal of Heat and
Mass Transfer 35(8), 1947-1956.##
Yoo, J. S. (1998). Mixed convection of air between
two horizontal concentric cylinders with a
cooled rotating outer cylinder. International
Journal of Heat and Mass Transfer 41(2), 293-
302.##
Yu, Z. T., X. Xu, Y. C. Hu, L. W. Fan and K. F.
Cen (2012). A numerical investigation of
transient natural convection heat transfer of
aqueous nanofluids in a horizontal concentric
annulus. International Journal of Heat and
Mass Transfer 55(4), 1141–1148.##]Axial-Flow Compressor Performance Prediction in Design and Off-Design Conditions through 1-D and 3-D Modeling and Experimental Study22In this study, the main objective is to develop a one dimensional model to predict design and off design performance of an operational axial flow compressor by considering the whole gas turbine assembly. The design and off-design performance of a single stage axial compressor are predicted through 1D and 3D modeling. In one dimensional model the mass, momentum and energy conservation equations and ideal gas equation of state are solved in mean line at three axial stations including rotor inlet, rotor outlet and stator outlet. The total to total efficiency and pressure ratio are forecasted using the compressor geometry, inlet stagnation temperature and stagnation pressure, the mass flow rate and the rotational speed of the rotor, and the available empirical correlation predicting the losses. By changing the mass flow rate while the rotational speed is fixed, characteristic curves of the compressor are obtained. The 3D modeling is accomplished with CFD method to verify one dimensional code at non-running line conditions. By defining the three-dimensional geometry of the compressor and the boundary conditions coinciding with one dimensional model for the numerical solver, axial compressor behavior is predicted for various mass flow rates in different rotational speeds. Experimental data are obtained from tests of the axial compressor of a gas turbine engine in Sharif University gas turbine laboratory and consequently the running line is attained. As a result, the two important extremities of compressor performance including surge and choking conditions are obtained through 1D and 3D modeling. Moreover, by comparing the results of one-dimensional and three-dimensional models with experimental results, good agreement is observed. The maximum differences of pressure ratio and isentropic efficiency of one dimensional modeling with experimental results are 2.1 and 3.4 percent, respectively.21492160A.PeyvanSchool of Mechanical Engineering, Sharif University of Technology, Tehran, IranSchool of Mechanical Engineering, Sharif University of Technology, Tehran, Iranpayspeivan@yahoo.comA. H.BenisiSchool of Mechanical Engineering, Sharif University of Technology, Tehran, IranSchool of Mechanical Engineering, Sharif University of Technology, Tehran, Iranpayshajilouy@sharif.eduAxial compressor One dimensional modeling Three dimensional modeling Characteristic curve.[Asgarshamsi, A., A. H. Benisi, A. Assempour and
H. Pourfarzaneh (2014). Multi-objective
optimization of lean and sweep angles for
stator and rotor blades of an axial turbine.
Proceedings of the Institution of Mechanical
Engineers, Part G: Journal of Aerospace
Engineering, p. 0954410014541080.##
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Proceedings of the Institution of Mechanical
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Engineering Science 213, 107-124.##
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Compressor at Design and Off-Design
Conditions. ASME Turbo Expo 2008: Power
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Mechanical Engineering, Sharif University of
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112, 567-578.##]Effects of Wavy Channel Entrance Design on Streamwise Counter-rotating Vortices: a Visualization Study22Two different channel entrance designs, code named Valley First (VF) and Peak First (PF), were experimentally visualized by means of smoke-wire visualization technique to observe their effects towards the streamwise counter-rotating vortices generated. The spanwise wavelength of the vortices was pre-set by modifying the leading edge. The investigation was carried out on the laminar boundary-layer flow in a rectangular channel with one-sided wavy surface that has amplitude a and wavelength λ of 7.5 mm and 76 mm, respectively. The vortices in the channel with VF design preserve farther downstream than those on the PF design, which might be caused by the large favorable pressure gradient between the entrance flat plate and the first peak location. The counter-rotating vortices could still be observed at non-dimensionalized streamwise distance χ (= x/λ) = 2.47 for Reynolds number Re (= UH/ν) = 9900 in channel with VF design. For lower Re, the vortices could preserve further downstream. In contrast, in channel with PF design, the structures were only visible clearly up to approximately χ = 1.32 for Re = 4700 and χ = 0.39 for Re = 5200. 21612166A. C.BudimanDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576paysalex002@lipi.go.idH.MitsudharmadiReactive Flow Modeling Laboratory Group in Clean Combustion Research Center, King Abdullah University of Science and Technology, Thuwal 23955, Kingdom of Saudi ArabiaReactive Flow Modeling Laboratory Group in Clean Combustion Research Center, King Abdullah University of Science and Technology, Thuwal 23955, Kingdom of Saudi Arabiapayshmitsudharmadi@gmail.comY.BouremelInstitute of Ophthalmology, University College London, London EC1V 9EL, United KingdomInstitute of Ophthalmology, University College London, London EC1V 9EL, United Kingdompaysyann.bouremel@gmail.comS. H.WinotoFaculty of Engineering, Universitas Diponegoro, Tembalang Campus, Semarang 50275, IndonesiaFaculty of Engineering, Universitas Diponegoro, Tembalang Campus, Semarang 50275, Indonesiapaysshwinoto@gmail.comH. T.LowDepartment of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576paysmpelowht@nus.edu.sgBoundary-layer flow Smoke-wire flow visualization Wavy channel.[Aider, J. L., Duriez, T. and J. E. Wesfreid (2008).
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AIAA 18th Fluid Dynamics and
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Transition. Journal of Fluid Mechanics 38(3),
473-480.##]Thermo-Magneto-Convective Transport around a Square Cylinder in a Square Duct under Strong Axial Magnetic Field22A quasi two-dimensional numerical study is performed to analyze the thermo-magneto-convective transport of liquid metal around a square cylinder in a square duct subjected to a strong externally imposed axial magnetic field. The channel bottom wall is considered heated while the top wall is maintained at the free stream temperature keeping the cylinder adiabatic. The Reynolds and Hartmann numbers are kept in the range and . The flow dynamics in the aforementioned range of parameters reveals the existence of four different regimes out of which the first three ones are similar to the classical non-MHD 2-D cylinder wakes while the fourth one is characterized by the vortices evolved from the duct side walls due to the boundary layer separation which strongly disturbs the Kármán vortex street. The flow dynamics and heat transfer rate from the heated channel wall are observed to depend on the imposed magnetic field strength. With increasing magnetic field, the flow becomes stabilized resulting in a degradation in the forced convection heat transfer. A special case at a very high Reynolds number with Ha = 2160 is also considered to show the development of a Kelvin–Helmholtz-type instability that substantially affects the heat transfer rate.
21672175D.ChatterjeeSimulation & Modeling Laboratory, CSIR-Central Mechanical Engineering Research Institute, Durgapur-713209, IndiaSimulation & Modeling Laboratory, CSIR-Central Mechanical Engineering Research Institute, Durgapur-713209, Indiapaysrsdchat@yahoo.co.inS. K.GuptaDepartment of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USADepartment of Mechanical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USApaysgsatish60@gmail.comSquare cylinder MHD flow Forced convection heat transfer Axial magnetic field Quasi two-dimensional model Kelvin–Helmholtz- instability.[ANSYS Workbench User's Guide (2010). Release
13.0, ANSYS Inc., Canonsburg, PA.
Chatterjee, D. and K. Chatterjee (2013a).
Unconfined flow and heat transfer around a
square cylinder at low Reynolds and Hartmann
numbers. International Journal of Fluid
Mechanics Research 40, 71-90.##
Chatterjee, D. and K. Chatterjee (2013b). Wall
bounded flow and heat transfer around a
circular cylinder at low Reynolds and Hartmann numbers. Heat Transfer-Asian
Research 42, 133-150.##
Chatterjee, D. and S. K. Gupta (2015). MHD flow
and heat transfer behind a square cylinder in a
duct under strong axial magnetic field.
International Journal of Heat and Mass
Transfer 88, 1-13.##
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Control of flow separation around bluff
obstacles by transverse magnetic field. Journal
of Fluids Engineering Transactions of ASME
134, 091102-1-091102-11.##
Chatterjee, D., K. Chatterjee, B. Mondal and N. B.
Hui (2014). Wall confined flow and heat
transfer around a square cylinder at low
Reynolds and Hartmann numbers. Heat
Transfer-Asian Research 43, 459-475.##
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MHD Mixed Convection Flow in a Vertical
Insulated Square Duct with Strong Transverse
Magnetic Field. Journal of Applied Fluid
Mechanics 8, 473-481.##
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simulations of a cylinder wake under a strong
axial magnetic field. Physics of Fluids 20,
017104.##
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type multigrid methods. Journal of
Computational Mathematics 21, 421-434.##
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transfer in a high Hartmann number MHD duct
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and Mass Transfer 67, 944–954.##
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(2011). Dynamics and heat transfer in a quasitwo-
dimensional MHD flow past a circular
cylinder in a duct at high Hartmann number.
International Journal of Heat and Mass
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(2000). Three-dimensional MHD flows in
rectangular ducts with internal obstacles.
Journal of Fluid Mechanics 418, 265-295.##
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Tomboulides (1997). Two- and threedimensional
instabilities of the cylinder wake
in an aligned magnetic field. Physics of Fluids
9, 3114-3116.##
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Tomboulides (2001). The scenario of threedimensional
instabilities of the cylinder wake
in an external magnetic field. Physics of Fluids
13, 723-734.##
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(2004). A numerical study on the fluid flow and
heat transfer around a circular cylinder in an
aligned magnetic field. International Journal of
Heat and Mass Transfer 47, 4075-4087.##]Numerical Study of Natural Convection and Entropy Generation of Al2O3-Water Nanofluid within a Cavity Equipped with a Conductive Baffle22Heat transfer, ﬂuid ﬂow and entropy generation due to buoyancy forces in a 2-D enclosure equipped with a conductive baffle and containing Al2O3nanoﬂuid is carried out using different conductivities of baffle and different concentrations of nanoparticles. The bottom wall is subjected to constant hot temperature. The right and left vertical walls are maintained at lower temperature and the top wall is insulated. The ﬁnite volume method is used to solve the governing equations and calculations were performed for Rayleigh number from 103 to 106, thermal conductivity ratio from 0.01 to 100 and volume fraction of nanoparticles from 0 to 0.2. An increase in mean Nusselt number and a decrease of the total entropy generation were found with the increase of volume fraction of nanoparticles for the whole range of Rayleigh number. 21772186L.KolsiCollege of Engineering, Mechanical Engineering Department, Haïl University, Haïl City, Saudi ArabiaCollege of Engineering, Mechanical Engineering Department, Haïl University, Haïl City, Saudi Arabiapayslioua_enim@yahoo.frNatural convection Nanofluids Conductive baffle.[Abu-Nada, E. (2008). Application of nanofluids for
heat transfer enhancement of separated flows
encountered in a backward facing step. Int. J.
Heat Fluid Flow (29) 242–249.##
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surface. International Journal of Heat and
Mass Transfer (77), 818–827.##
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Choi (2005). Empirical correlation finding the
role of temperature and particle size for
nanofluid (Al2O3) thermal conductivity
enhancement, Appl. Phys. Lett. (87), 153107.##
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nanofluid in an enclosure with a heat sink and
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(54), 8–17.##]Performance and Emission Characteristics of Diesel and Jatropha Oil Blends in a Direct Injection Variable Compression Ratio Ignition Engine22The rapid depletion of conventional fuel and fluctuation of Diesel price in the global market have promoted research for alternative fuels for Diesel engine. Among the different alternative fuels, vegetable oil having fuel properties similar to Diesel has an acceptable engine performance. Vegetable oils are producing less CO2 emissions to the atmosphere because of their agricultural origin and less carbon content compared to mineral Diesel. It also reduces import of petroleum products. In the present investigation, an experimental study is carried out on an I.C.E laboratory in single cylinder, four-stroke VCR, direct injection Diesel engine to analyze the performance and emission characteristics of pure Diesel and Jatropha oil-Diesel blended fuels with various blend ratios. The measurements are recorded for the compression ratio 16, 17 and 18 with varying load from idle to rated load of 5.2 kW. Comparative results are given at constant engine speed, variable compression ratio and different engine BMEP for baseline Diesel and Jatropha oil-Diesel blended fuels revealing the effect of Diesel and Jatropha-Diesel blended fuels’ combustion on engine performance and exhaust emissions. The results show that for same blend, performance of the engine is improved considerably with the increase in CR. Thermal efficiency, exhaust gas temperature and emission parameters such as NOX, HC and CO at CR 18 with blends containing up to 30% (by volume) Jatropha oil is comparable to that of diesel fuel. So, blends containing up to 30% (by volume) Jatropha oil at CR 18 can be honestly used as an alternative fuel without any engine modification.
21872194B.DeDepartment of Mechanical Engineering, National Institute of Technology Agartala, IndiaDepartment of Mechanical Engineering, National Institute of Technology Agartala, Indiapaysbiswajitphd@gmail.comR. S.PanuaDepartment of Mechanical Engineering, National Institute of Technology Agartala, IndiaDepartment of Mechanical Engineering, National Institute of Technology Agartala, Indiapaysrajsekhar_panua@yahoo.co.inJatropha oil Blending Viscosity Concentration Performance Emission analysis.[Babu, K. and G. Devarajane (2003). Vegetable oils
and their derivatives as fuels for CI engines: an
overview. Society of Automotive Engineers,
406-418.##
Bijalwan, A., C. M. Sharma and V. K. Kedial
(2006). Bio-diesel revolution. Science reporter
14-17.##
De, B. and R. S. Panua (2014). CFD Modeling and
validation of combustion in direct injection
Compression Ignition engine fuelled with
Jatropha oil blends with Diesel. Frontiers in
Heat and Mass Transfer.##
De, B. and R. S. Panua (2015). Performance and
emission characteristics of Diesel and
vegetable oil blends in a direct-injection
engine. Journal of the Brazillian Society of
Mechanical Sciences and Engineering.##
He, Y. and Y. D. Bao (2003). Study on rapeseed oil
as alternative fuel for a single cylinder diesel
engine. Renewable Energy 28, 1447–1453.##
Karosmanoglu, F., G. Kurt and T. Ozaktas (2000).
Long term CI engine test of sunflower oil,
Renewable Energy 19, 219-221.##
Ramadhas, A. S., S. Jayaraj and C. Muraleedharan
(2005). Characterization and effect of using
rubber seed oil as fuel in the compression
ignition engines. Renewable Energy, 30, 795–
803.##
Thomas, R. W. and B. O. Maurin (1993).
Identification of chemical change occurring
during the transient injection of selected
vegetable oils, 201-210.##]Flow of Generalized Burgers' Fluid between Side Walls Induced by Sawtooth Pulses Stress22This paper presents the unsteady magnetohydrodynamic (MHD) flow of a generalized Burgers' fluid between two parallel side walls perpendicular to a plate. The flow is generated from rest at time induced by sawtooth pulses stress applied to the bottom plate. The solutions obtained by means of the Laplace and the Fourier cosine and sine transforms in this order are presented as a sum between the corresponding Newtonian and non-Newtonian contributions. We investigate the effect of magnetic field and permeability on the fluid motion by a numerical procedure for the inverse Laplace transform, namely Stehfest's algorithm. Moreover, the influence of side walls on the fluid motion, the effect of pulse period, magnetic and porosity parameters and material parameters is presented by graphical illustrations. 21952204Q.SultanCentre for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan, 60800, PakistanCentre for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan, 60800, Pakistanpaysqamar786s@yahoo.comM.NazarCentre for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan, 60800, PakistanCentre for Advanced Studies in Pure and Applied Mathematics, Bahauddin Zakariya University, Multan, 60800, Pakistanpaysmudassar_666@yahoo.comGeneralized burgers' fluid Sawtooth pulses stress MHD flow Porous medium.[Akhtar, A., Cor. Fetecau and A. U. Awan (2011).
Exact solutions for the Poiseuille flow of a
generalized Maxwell fluid induced by timedependent
shear stress. ANZIAM Journal. 0, 1-
13.##
Chakraborty, A. and J. Ray (1980). Unsteady
magnetohydrodynamic Couette flow between
two plates when one of the plates is subjected
to random pulses. Journal of the Physical
Society of Japan, 48(4) 1361-1364.##
Fetecau, C., D. Vieru and Cor. Fetecau (2011).
Effect of the side walls on the motion of a
viscous fluid induced by an infinite plate that
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22472256H.LiuSchool of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, ChinaSchool of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, Chinapaysliuhao56@cumt.edu.cnJ.B.HaoSchool of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, ChinaSchool of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, Chinapaysjingbinhao@cumt.edu.cnG.YuKey Laboratory of Mechanics in Advanced Manufacturing, Institute of Mechanics, Chinese Academy of Science, Beijing, 100044, ChinaKey Laboratory of Mechanics in Advanced Manufacturing, Institute of Mechanics, Chinese Academy of Science, Beijing, 100044, Chinapaysleonardo2008lh@163.comH. F.YangSchool of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, ChinaSchool of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, Chinapaysyhf002@163.comL. W.WangSchool of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, ChinaSchool of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, Chinapayswanglinwei@outlook.comZ. T.HanSchool of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, ChinaSchool of Mechanical and Electrical Engineering, China University of Mining and Technology, Xuzhou, Jiangsu, 221116, Chinapaysjdjxcumt@163.comCoaxial laser cladding Gas-solid flow Powder concentration distribution Substrate shape.[Balu P., P. Leggett and R. Kovacevic (2012).
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air-injection, injection timing and cooled EGR
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USSR.##]Wave Transformation Modeling with Effective Higher-Order Finite Elements22This study introduces a finite element method using a higher-order interpolation function for effective simulations of wave transformation. Finite element methods with a higher-order interpolation function usually employ a Lagrangian interpolation function that gives accurate solutions with a lesser number of elements compared to lower order interpolation function. At the same time, it takes a lot of time to get a solution because the size of the local matrix increases resulting in the increase of band width of a global matrix as the order of the interpolation function increases. Mass lumping can reduce computation time by making the local matrix a diagonal form. However, the efficiency is not satisfactory because it requires more elements to get results. In this study, the Legendre cardinal interpolation function, a modified Lagrangian interpolation function, is used for efficient calculation. Diagonal matrix generation by applying direct numerical integration to the Legendre cardinal interpolation function like conducting mass lumping can reduce calculation time with favorable accuracy. Numerical simulations of regular, irregular and solitary waves using the Boussinesq equations through applying the interpolation approaches are carried out to compare the higher-order finite element models on wave transformation and examine the efficiency of calculation.22672276T. H.JungDepartment of Civil and Environmental Engineering, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon 305-719, Republic of KoreaDepartment of Civil and Environmental Engineering, Hanbat National University, 125 Dongseodaero, Yuseong-gu, Daejeon 305-719, Republic of Koreapaysthjung@hanbat.co.krY.RyuHydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdaero, Ilsanseo-gu, Goyang, Gyeonggi-do 411-712, Republic of KoreaHydro Science and Engineering Research Institute, Korea Institute of Civil Engineering and Building Technology, 283 Goyangdaero, Ilsanseo-gu, Goyang, Gyeonggi-do 411-712, Republic of Koreapaysryu006@gmail.comFinite element method Boussinesq equations Lagrangian interpolation function Legendre cardinal interpolation function.[Adytia, D. and E. van Groesen (2012). Optimized
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Coastal Engineering 92, 31-47.##
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model for modified Boussinesq equations. I:
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model for modified Boussinesq equations. II:
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Journal of Waterway Port Costal and Ocean
Engineering 130, 17-28.##
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Hill, Maidenhead, England.##]Mixed Convection of Alumina/Water Nanofluid in Microchannels using Modified Buongiorno’s Model in Presence of Heat Source/Sink22The nanoparticle migration effects on mixed convection of alumina/water nanofluid in a vertical microchannel in the presence of heat source/sink with asymmetric wall heating are theoretically investigated. The modified two-component heterogeneous model is employed for the nanofluid in the hypothesis that the Brownian motion and the thermophoresis are the only significant bases of nanoparticle migration. Because of low dimensional structures in microchannels, a linear slip condition is considered at the surfaces, which appropriately represents the non-equilibrium region near the interface. Considering hydrodynamically and thermally fully developed flow, the basic partial differential equations including the continuity, momentum, energy, and nanoparticle fraction have been reduced to two-point ordinary boundary value differential equations before they have been solved numerically. The scale analysis of governing equations has shown that the buoyancy effects due to the temperature distribution is insignificant, however, the buoyancy effects due to the concentration distribution of nanoparticles have considerable effects on the flow and heat transfer characteristics of nanofluids. It is also revealed that the imposed thermal asymmetry would change the direction of nanoparticle migration and distorts the symmetry of the velocity, temperature and nanoparticle concentration profiles. Moreover, the best performance of the system is achieved under one-sided heating and a greater slip velocity at the walls.22772289A.MalvandiYoung Researchers and Elite Club, Karaj Branch, Islamic Azad University, Karaj, IranYoung Researchers and Elite Club, Karaj Branch, Islamic Azad University, Karaj, Iranpaysamirmalvandi@hotmail.comD. D.GanjiMechanical Engineering Department, Babol University of Technology, Babol, IranMechanical Engineering Department, Babol University of Technology, Babol, Iranpaysddg_davood@yahoo.comNanofluid Nanoparticles migration Mixed convection Thermal asymmetry Microchannel Modified Buongiorno’s Model.[Ashorynejad, H. R., A. A. Mohamad and M.
Sheikholeslami (2013). Magnetic field effects
on natural convection flow of a nanofluid in a
horizontal cylindrical annulus using Lattice
Boltzmann method. International Journal of
Thermal Sciences 64(0), 240-250.##
Buongiorno, J. (2006). Convective Transport in
Nanofluids. Journal of Heat Transfer 128(3),
240-250.##
Cheng, C. H., H. S. Kou and W. H. Huang (1990).
Flow reversal and heat transfer of fully
developed mixed convection in vertical
channels. Journal of Thermophysics and Heat
Transfer 4(3), 375-383.##
Choi, S. U. S. (1995). Enhancing thermal
conductivity of fluids with nanoparticles. in
Developments and Applications of Non-
Newtonian Flows, D. A. Siginer and H. P.
Wang, Eds., ASME 66, 99-105.##
Ganji, D. D. and A. Malvandi (2014). Natural
convection of nanofluids inside a vertical
enclosure in the presence of a uniform
magnetic field. Powder Technology 263(0), 50-
57.##
Hedayati, F., A. Malvandi, M. H. Kaffash and D. D.
Ganji (2015). Fully developed forced
convection of alumina/water nanofluid inside
microchannels with asymmetric heating.
Powder Technology 269, 520-531.##
Hedayati, F. and G. Domairry (2015). Effects of
nanoparticle migration and asymmetric heating
on mixed convection of TiO2–H2O nanofluid
inside a vertical microchannel. Powder
Technology 272, 250-259.##
Hwang, K. S., S. P. Jang and S. U. S. Choi (2009).
Flow and convective heat transfer
characteristics of water-based Al2O3
nanofluids in fully developed laminar flow
regime. International Journal of Heat and
Mass Transfer 52(1–2), 193-199.##
Koo, J. and C. Kleinstreuer (2005). Laminar
nanofluid flow in microheat-sinks.
International Journal of Heat and Mass
Transfer 48(13), 2652-2661.##
Kuznetsov, A. V. and D. A. Nield (2010). Natural
convective boundary-layer flow of a nanofluid
past a vertical plate. International Journal of
Thermal Sciences 49(2), 243-247.##
Mahmoodi, M. and S. M. Hashemi (2012).
Numerical study of natural convection of a
nanofluid in C-shaped enclosures.
International Journal of Thermal Sciences
55(0), 76-89.##
Malvandi, A. and D. D. Ganji (2014). Brownian
motion and thermophoresis effects on slip flow
of alumina/water nanofluid inside a circular
microchannel in the presence of a magnetic
field. International Journal of Thermal
Sciences 84, 196-206.##
Malvandi, A. and D. D. Ganji (2014). Effects of
nanoparticle migration on force convection of
alumina/water nanofluid in a cooled parallelplate
channel. Advanced Powder Technology
25(4), 1369-1375.##
Malvandi, A. and D. D. Ganji (2014). Magnetic
field effect on nanoparticles migration and heat
transfer of water/alumina nanofluid in a
channel. Journal of Magnetism and Magnetic
Materials 362(0), 172-179.##
Malvandi, A. and D. D. Ganji (2014). Mixed
convective heat transfer of water/alumina
nanofluid inside a vertical microchannel.
Powder Technology 263(0), 37-44.##
Malvandi, A. and D. D. Ganji (2015). Effects of
nanoparticle migration and asymmetric heating
on magnetohydrodynamic forced convection of
alumina/water nanofluid in microchannels.
European Journal of Mechanics - B/Fluids 52,
169-184.##
Malvandi, A. and D. D. Ganji (2015). Effects of
nanoparticle migration on hydromagnetic
mixed convection of alumina/water nanofluid
in vertical channels with asymmetric heating.
Physica E: Low-dimensional Systems and
Nanostructures 66, 181-196.##
Malvandi, A. and D. D. Ganji (2015). Magnetic
field and slip effects on free convection inside
a vertical enclosure filled with alumina/water
nanofluid. Chemical Engineering Research
and Design 94, 355-364.##
Malvandi, A., F. Hedayati and D. D. Ganji (2013).
Thermodynamic optimization of fluid flow
over an isothermal moving plate. Alexandria
Engineering Journal 52(3), 277-283.##
Malvandi, A., F. Hedayati and D. D. Ganji (2014).
Slip effects on unsteady stagnation point flow
of a nanofluid over a stretching sheet. Powder
Technology 253, 377-384.##
Malvandi, A., F. Hedayati, D. Ganji and Y.
Rostamiyan (2014). Unsteady boundary layer
flow of nanofluid past a permeable
stretching/shrinking sheet with convective heat
transfer. Proceedings of the Institution of
Mechanical Engineers, Part C: Journal of
Mechanical Engineering Science 228(7), 1175-
1184.##
Malvandi, A., M. H. Kaffash and D. D. Ganji
(2015). Nanoparticles migration effects on
magnetohydrodynamic (MHD) laminar mixed
convection of alumina/water nanofluid inside
microchannels. Journal of the Taiwan Institute
of Chemical Engineers 52, 40-56.##
Malvandi, A., M. R. Safaei, M. H. Kaffash and D.
D. Ganji (2015). MHD mixed convection in a
vertical annulus filled with Al2O3–water
nanofluid considering nanoparticle migration.
Journal of Magnetism and Magnetic Materials
382, 296-306.##
Malvandi, A., S. A. Moshizi and D. D. Ganji
(2014). Effect of magnetic fields on heat
convection inside a concentric annulus filled
with Al2O3–water nanofluid. Advanced
Powder Technology 25(6), 1817-1824.##
Malvandi, A., S. A. Moshizi, E. G. Soltani and D.
D. Ganji (2014). Modified Buongiorno’s
model for fully developed mixed convection
flow of nanofluids in a vertical annular pipe.
Computers and Fluids 89(0), 124-132.##
Masuda, H., A. Ebata, K. Teramae and N.
Hishinuma (1993). Alteration of
thermalconductivity and viscosity of liquid by
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Transfer 135(5), 054504-054504.##]Optimal Design of VLH Axial Hydro-Turbine using Regression Analysis and Multi-Objective Function (GA) Optimization Methods22This research study was aimed to develop a new concept design of a very low head (VLH) turbine using advanced optimization methodologies. A potentially local site was chosen for the turbine and based on its local conditions, such as the water head level of <2 meters and the flow rate of <5 m3/s. The study focused on the optimization of the turbine blade and guide vane profiles, because of their major impacts on the efficiency of the VLH axial flow turbine. The fluid flow simulation was firstly conducted for the axial turbine, followed by applying the regression analysis concept to develop a turbine mathematical model where the leading- and trailing-edge angles of the guide vanes and the turbine blades were related to the efficiency, total head and flow rate. The genetic algorithms (GA) with multi-objective function was also used to locate the optimal blade angles. Thereafter, the refined design was re-simulated. Following this procedure the turbine efficiency was improved from 82.59% to 83.96% at a flow rate of 4.2 m3/s and total head of 2 meters. 22912298W.NuantongDepartment of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, 40002, ThailandDepartment of Mechanical Engineering, Faculty of Engineering, Khon Kaen University, 40002, Thailandpaysnu.weerapon@gmail.comS.TaechajedcadarungsriDepartment of Mechanical Engineering, Faculty of Engineering, Ubon Ratchathani University, 34190, ThailandDepartment of Mechanical Engineering, Faculty of Engineering, Ubon Ratchathani University, 34190, Thailandpayssirivit.t@ubu.ac.thBlade angle Regression analysis Fluid flow simulation Optimization Genetic algorithm Very low head turbine.[Albuquerque, R. B. F., N. Manzanares-Filho and
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Technological Sciences 54(2), 338–344.##]Numerical Study of the Instability and Flow Transition in a Vortex-Ring/Wall Interaction22Instability and fl w transition of a vortex ring impinging on a wall were investig ated by means
of large-eddy simulation for two vortex core thicknesses corresponding to thin and thick vortex
rings. Various fundamental mechanisms dictating the fl w behaviours, such as evolution of vortical
structures, instability and breakdown of vortex rings, development of modal energies, and transition
from laminar to turbulent state, have been studied systematically . Analysis of the enstrophy of
wrapping vortices and turbulent kinetic energy (TKE) in fl w fiel indicates that the formation and
evolution of wrapping vortices are closely associated with the fl w transition to turbulent state. It is
found that the temporal development of wrapping vortices and the growth rate of axial fl w generated
around the circumference of the core region for the thin ring are faster than those for the thick ring.
The azimuthal instabilities of primary and secondary vortex rings are analysed and the development
of modal energies reveals the fl w transition to turbulent state. The law of energy decay follows a
characteristic k
5=3
law, indicating that the vortical fl w has become turbulent. The results obtained
in this study provide physical insight into the understanding of the instability mechanisms relevant
to the vortical fl w evolution.22992309H.RenChina Electronics Technology Group Corporation No.38 Research Institute, Hefei 230088, P.R. ChinaChina Electronics Technology Group Corporation No.38 Research Institute, Hefei 230088, P.R. Chinapaysrenheng_cetc38@163.comG. X.ZhangChina Electronics Technology Group Corporation No.38 Research Institute, Hefei 230088, P.R. ChinaChina Electronics Technology Group Corporation No.38 Research Institute, Hefei 230088, P.R. Chinapayszhanggx@jafmonline.netH. S.GuanChina Electronics Technology Group Corporation No.38 Research Institute, Hefei 230088, P.R. ChinaChina Electronics Technology Group Corporation No.38 Research Institute, Hefei 230088, P.R. Chinapaysguan@jafmonline.netLarge eddy simulation Vortical structure Instability Transition Turbulent flow.[Adrian, R. J. (2007). Hairpin vortex organization
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015502.##]Turbulent Viscosity Concept Downstream an Open-Channel Sudden Expansion22The recirculations are essential in river engineering because they form silting zones and favour the
development of speciﬁc fauna and ﬂora. This paper deals with the behaviour of the recirculation
zones occurring downstream the sudden expansion of an open channel. An Acoustic Doppler Velocimeter
is
used
to
measure
the
ﬂow
details.
The mean ﬂow property such as the length of the recirculation,
the
average
velocity
ﬁeld
and
velocity
gradient
are
obtained.
Then the self-similarity of the
velocity proﬁle is retrieved . The numerical simulation for the similar conditions are preformed with
the CFD software STAR CCM+. When compared with the experiments, the two approaches correspond
well in terms of length of recirculation zone and also regarding details such as the velocity
gradient proﬁles. Finally, the eddy viscosity concept is tested and the turbulent viscosity coefﬁcient
are obtained along the streamwise axis for all ﬂows.23112319L.HanLMFA, CNRS-Université de Lyon, INSA de Lyon, Bat. Joseph Jacquard, 20 Av. A. Einstein, 69621 Villeurbanne, France.LMFA, CNRS-Université de Lyon, INSA de Lyon, Bat. Joseph Jacquard, 20 Av. A. Einstein, 69621 Villeurbanne, France.payshanleilyon@hotmail.comE.MignotLMFA, CNRS-Université de Lyon, INSA de Lyon, Bat. Joseph Jacquard, 20 Av. A. Einstein, 69621 Villeurbanne, France.LMFA, CNRS-Université de Lyon, INSA de Lyon, Bat. Joseph Jacquard, 20 Av. A. Einstein, 69621 Villeurbanne, France.paysemmanuel.mignot@insa-lyon.frN.RiviereLMFA, CNRS-Université de Lyon, INSA de Lyon, Bat. Joseph Jacquard, 20 Av. A. Einstein, 69621 Villeurbanne, France.LMFA, CNRS-Université de Lyon, INSA de Lyon, Bat. Joseph Jacquard, 20 Av. A. Einstein, 69621 Villeurbanne, France.paysnicolas.riviere@insa-lyon.frShallow ﬂow Turbulent eddy viscosity Experiments Numerical simulation Recirculation.[Babarutsi, S. and V. Chu (1991). Dyeconcentration
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Mech.. 41(2), 327–361.##]A Note on Bubble Sizes in Subcooled Flow Boiling at Low Velocities in Internal Combustion Engine-Like Conditions22Current trends in engine design indicate the necessity to take advantage of the highest rates of heat
transfer associated with nucleate boiling, mostly at high engine loads. When used in conjunction
with advanced thermal management strategies, subcooled boiling may take place at very low velocities,
for which little information is available, and in ducts with small cross-sectional area, so that
undesired effects of the relative sizes of ducts and bubbles may appear. In this paper, experiments
on subcooled boiling ﬂow at low velocities and engine-like temperature conditions were conducted
with a usual engine coolant. A high-speed photographic camera was used to collect images of the
detached vapor bubbles, and the microscopic characteristics of the heating surface were determined.
Experimental results for the mean values show acceptable agreement with the results of a mechanistic
radius model, when assuming that departure and lift-of radius are related through the ﬂow boiling
suppression factor. Additionally, the results obtained are compatible with the sizes of the nucleation
sites estimated from the surface characterization. The results obtained for the size distribution are
consistent with those found in the literature.23212332A. J.TorregrosaCMT - Motores T´ermicos, Universitat Polit`ecnica de Val`encia, Aptdo. 22012, E-46071 Valencia, SpainCMT - Motores T´ermicos, Universitat Polit`ecnica de Val`encia, Aptdo. 22012, E-46071 Valencia, Spainpaysatorreg@mot.upv.esA.BroatchCMT - Motores T´ermicos, Universitat Polit`ecnica de Val`encia, Aptdo. 22012, E-46071 Valencia, SpainCMT - Motores T´ermicos, Universitat Polit`ecnica de Val`encia, Aptdo. 22012, E-46071 Valencia, Spainpaysabroatch@mot.upv.esp.OlmedaCMT - Motores T´ermicos, Universitat Polit`ecnica de Val`encia, Aptdo. 22012, E-46071 Valencia, SpainCMT - Motores T´ermicos, Universitat Polit`ecnica de Val`encia, Aptdo. 22012, E-46071 Valencia, Spainpayspabolgon@mot.upv.esO.CornejoCMT - Motores T´ermicos, Universitat Polit`ecnica de Val`encia, Aptdo. 22012, E-46071 Valencia, SpainCMT - Motores T´ermicos, Universitat Polit`ecnica de Val`encia, Aptdo. 22012, E-46071 Valencia, Spainpaysomcorlu@posgrado.upv.esEngine cooling Bubble radius Bubble size distribution Heater surface structure.[Ajotikar, N., B. J. Eggart and S. A. Miers
(2010). Nucleate boiling identification
and utilization for improved internal
combustion engine efficiency. In Proc.
ASME Internal Combustion Engine Division
Fall Technical Conference 949–958.##
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(1996). Nucleate pool boiling heat transfer
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2495–2504.##
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flows. Phys. Fluids A 5, 3186–3196.##]Effect of Inclination Angle and Magnetic Field on Convection Heat Transfer for Nanoﬂuid in a Porous Cavity22In this paper, the effect of inclination angle and magnetic ﬁeld in a two-dimensional porous cavity
ﬁlled with Cu-water nanoﬂuid has been studied numerically. The equations are framed using the
Darcy-Brinkman-Forchheimer model. The control volume technique is used to solve the governing
equations and SIMPLE algorithm is employed for the momentum equations. Comparison test was
done with previous available literatures and the results are found to be in good agreement. The
results are presented for different values of inclination angle (0
o
g 180
o
), Hartmann number (0
Ha 100), Darcy number (10
5
Da 10
1
) and solid volume fraction (0% 5%) while the
porosity e, Rayleigh number Ra and Prandtl number Pr are ﬁxed at 0.6, 10
6
and 6.2, respectively.
It is found that the inﬂuence of solid volume fraction is strongly affected by the presence of strong
magnetic ﬁeld and the inclination angle 90
o
in the porous medium.23472358N.NithyadeviDepartment of Mathematics, Bharathiar University, Coimbatore, Tamilnadu, IndiaDepartment of Mathematics, Bharathiar University, Coimbatore, Tamilnadu, Indiapaysnithyadevin@gmail.comM.RajarathinamDepartment of Mathematics, Bharathiar University, Coimbatore, Tamilnadu, IndiaDepartment of Mathematics, Bharathiar University, Coimbatore, Tamilnadu, Indiapaysrajarathinam.7487@gmail.comNanoﬂuid Magnetic ﬁeld Porous medium Inclination angle.[Al-Zamily, A. (2014). Effect of magnetic
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]Analysis of the Effect of the Swirl Flow Intensity on Combustion Characteristics in Liquid Fuel Powered Confined Swirling Flames22This article examines the implementation of CFD technology in the design of the industrial liquid fuel powered swirl flame burner. The coupling between the flow field and the combustion model is based on the eddy dissipation model. The choice of the LES (Large Eddy Simulation) turbulence model over standard RANS (Reynolds Averaged Navier-Stokes) offers a possibility to improve the quality of the combustion-flow field interaction. The Wall Adapting Local Eddy-Viscosity (WALE) sub-grid model was used. The reaction chemistry is a simple infinitely fast one step global irreversible reaction. The computational model was setup with the Ansys-CFX software. Through the detailed measurements of industrial size burner, it was possible to determine the natural operational state of the burner according to the type of fuel used. For the inlet conditions, axial and radial velocity components were calculated from known physical characteristics of both the fuel and air input, with the initial tangential velocity of the fuel assumed as18% of the initial axial fuel velocity. Different swirl number (S) values were studied. Addition of a surplus (in comparison to conventional flame stabilization) of tangential air velocity component (W), the rotational component increases itself with a considerably high magnitude, contributing to the overall flame stabilization. The level of S especially influences the turbulent energy, its dissipation rate and turbulent (Reynolds) stresses. In the case of high swirl number values (S > 0,65) it is possible to divide the flow field in three principle areas: mixing area (fuel-air), where exothermal reactions are taking place, central recirculation area and outer recirculation area, which primarily contains the flow of burnt flue gases. The described model was used to determine the flow and chemical behavior, whereas the liquid atomization was accounted for by LISA (Linear Instability Sheet Atomization) model incorporating also the cavitation within injection boundary condition. The boundary conditions were determined based on the data from the experimental hot water system. Depending on system requirements, especially with continuous physical processes as well as the results of experimental measurements, the paper reports on determination of the mixing field and its intensity in the turbulent flow, the description of heat release and interaction of turbulent flow field and chemical kinetics in the case of confined swirling flames. 23592367M.KlancisarDepartment of research and development, Max Weishaupt GmbH, Schwendi, GermanyDepartment of research and development, Max Weishaupt GmbH, Schwendi, Germanypaysmarko.klancisar@gmail.comT.SchloenDepartment of research and development, Max Weishaupt GmbH, Schwendi, GermanyDepartment of research and development, Max Weishaupt GmbH, Schwendi, Germanypaysfg.dr.schloen@weishaupt.deM.HriberšekUniversity of Maribor, Faculty of mechanical engineering, Maribor, SloveniaUniversity of Maribor, Faculty of mechanical engineering, Maribor, Sloveniapaysmatjaz.hribersek@um.siN.SamecUniversity of Maribor, Faculty of mechanical engineering, Maribor, SloveniaUniversity of Maribor, Faculty of mechanical engineering, Maribor, Sloveniapaysniko.samec@um.siCFD Fluid dispersion Combustion Industrial burner Confined swirling flame Two-phase flow.[Ansys CFX 14.0 (2011). Solver theory guide.
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283-291.##]Effect of Hall Current on the Onset of MHD Convection in a Porous Medium Layer Saturated by a Nanofluid22In this study, the effect of Hall current on the criterion for the onset of MHD convection in a porous medium layer saturated by a nanofluid is investigated. The model used for nanofluid combines the effect of Brownian motion and thermophoresis, while for a porous medium Brinkman model is used. A physically more realistic boundary condition than the previous ones on the nanoparticle volume fraction is considered i.e. the nanoparticle flux is assumed to be zero rather than prescribing the nanoparticle volume fraction on the boundaries. Using linear stability theory, the exact analytical expression for critical Rayleigh Darcy number is obtained in terms of various non-dimensional parameters. Results indicate that the magnetic field, Hall current, porous medium and nanoparticles significantly influence the stability characteristics of the system. The increase in the Hall current parameter, the Lewis number, the modified diffusivity ratio and the concentration Rayleigh Darcy number is to hasten the onset of convection while the magnetic Darcy number, the porosity parameter and the Darcy number has stabilized on the onset of convection. 23792389D.YadavSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South KoreaSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South Koreapaysdhananjayadav@gmail.comR. A.MohamedDepartment of Physics, Faculty of Education, Ain Shams University, Heliopolis, Roxy, Cairo, Egypt.Department of Physics, Faculty of Education, Ain Shams University, Heliopolis, Roxy, Cairo, Egypt.paysrashaaam@yahoo.comH.Hee ChoSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South KoreaSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South Koreapayshhcho@yonsei.ac.krJ.LeeSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South KoreaSchool of Mechanical Engineering, Yonsei University, Seoul 120 749, South Koreapaysjinholee@yonsei.ac.krHall current Thermal instability Porous medium Nanofluid Brownian motion Thermophoresis.[Buongiorno, J. (2006). Convective transport in
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24272434G.DuncaUniversity POLITEHNICA of Bucharest, RomaniaUniversity POLITEHNICA of Bucharest, Romaniapaysgeorgianadunca@yahoo.co.ukR. G.IovănelUniversity POLITEHNICA of Bucharest, RomaniaUniversity POLITEHNICA of Bucharest, Romaniapaysraluca.iovanel@gmail.comD. M.BucurUniversity POLITEHNICA of Bucharest, RomaniaUniversity POLITEHNICA of Bucharest, Romaniapaysdmbucur@yahoo.comM. J.CervantesNorwegian University of Science and Technology, Trondheim, NorwayNorwegian University of Science and Technology, Trondheim, Norwaypaysmichel.cervantes@ltu.sePressure measurement Method of characteristics Unsteady friction factor Discharge evaluation Hydropower. [Adamkowski, A. (2012). Discharge measurement
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Heat current and Ohmic heating effect on
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Transfer31, 751–762.##
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11.##
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heat and mass transfer by MHD mixed
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with chemical reaction and Soret and Dufour
effects. The Canadian Journal of Chemical
Engineering.##
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Near a Stagnation Point of a Three-
Dimensional Porous Body with Heat and Mass
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Chemical Reaction. Journal of Applied Fluid
Mechanics 4(2), 87-94.##
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and Mass Transfer from a Stretching Surface
Embedded in a Porous Medium with
Suction/Injection and Chemical Reaction
Effects. Chemical Engineering
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neural network for the modeling and control
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3182.##
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Ahmadu Bello University, Nigeria.##]Experimental and Numerical Investigation of Coating Effect on Pump Impeller and Volute22In this study, an impeller and volute of a centrifugal pump were designed and numerically analyzed in order to improve the pump efficiency. Before design, experimental and theoretical studies were performed on a centrifugal water pump taken as Model Pump (MP). Design parameters were taken as 100 m3/h for volume flow rate, 18m for head and 1480 rpm for rotating speed. After the inspection of the flow field in the MP, some geometrical modifications such as impeller inlet and outlet diameters, blade inlet and exit angles, blade wrap angle, blade thickness, blade inletand exit widthswere realized to design a new pump. Numerical analyses were performed for 8 different volume flow rates overlapping with experimental operation points by Ansys-Fluent Software. In numerical studies, k-ε turbulence model and standard wall function were utilized. The experimental and computational results were compared with the model pump. According to the analysis results at design flow rate, hydraulic torque value is decreased from 56.62 Nm to 51.05 Nm, while hydraulic efficiency is increased from 55.98% to 63.09%. In addition, in order to see the roughness effect and increase the pump efficiency, the wetted surfaces of the impeller and volute were coated with a polyurethane dye material. Later, performance curves of the coated and uncoated pumps were experimentally obtained which showed that the shaft power of the pump for the coated case was decreased around 10% and the hydraulic efficiency of the pump was increased approximately 18%. According to the economic analysis by basic payback period of the polyurethane coating is less than one year and the internal income ratio for ten-year life-cycle period is around %114. 24752487O.Kocaaslan1Selcuk University, Huglu Vocational School, Huglu-Konya, Turkey1Selcuk University, Huglu Vocational School, Huglu-Konya, Turkeypaysosmankocaaslan@gmail.comM.OzgorenSelcukUniversity, Engineering Faculty, Mechanical Engineering Department, Konya, TurkeySelcukUniversity, Engineering Faculty, Mechanical Engineering Department, Konya, Turkeypaysmozgoren@selcuk.edu.trM. H.AksoySelcukUniversity, Engineering Faculty, Mechanical Engineering Department, Konya, TurkeySelcukUniversity, Engineering Faculty, Mechanical Engineering Department, Konya, Turkeypaysmuharremaksoy@gmail.comO.BabayigitSelcuk University Hadim Vocational School, Hadim-Konya, TurkeySelcuk University Hadim Vocational School, Hadim-Konya, Turkeypaysobyigit@gmail.comCentrifugal pump CFD Coating Hydraulic efficiencyk-ε turbulence modelPolyurethane coatingTurbulence kinetic energy.[Anonymous,(2014)http://www.metaline.de/
Anonymous, Fluent 14.0 User Guide, Fluent Inc.
(2015).##
Babayigit, O., O. Kocaaslan, M.H. Aksoy, K.M.
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Kocaaslan, O, (2015). Experimental and numerical
investigation of an optimized pump impeller
with polyurethane surface coating effect for
efficiency improvement, MSc thesis. Selcuk
University, Konya, Turkey.##
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Assessment of Wind Energy Potential to Meet
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in Konya, Turkey. International Journal of
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Engineering 134(7), 071102-071108.##]Simultaneous Investigation of Flexibility and Plasma Actuation Effects on the Aerodynamic Characteristics of an Oscillating Airfoil22In this work, a numerical study of two dimensional laminar incompressible flow around the flexible oscillating NACA0012 airfoil is performed using the open source code OpenFOAM. Oscillatory motion types including pitching and flapping is considered. Reynolds number for these motions is assumed fixed at 12000. One of the important issues that must be considered in designing air structures, in particular the aircraft wing, is the interaction between the air and the elastic aircraft wings that is known as the Aeroelastic phenomenon. For this purpose, the effect of airfoil flexibility and flow induced vibration in these motion types is investigated and compared with the case of rigid airfoil. It is observed that the flexibility in both types of motions causes improvement of the thrust which is boosted with increasing the frequency. Contrary to thrust, the significant improvement of lift is only achievable in high frequencies. It was also found that the effect of flexibility on the flapping motion is higher than the pitching motion. For flow control on the airfoil, Dielectric Barrier Discharge plasma actuator is used in the trailing edge of a flexible airfoil, and its effect on the flexible airfoil is also investigated.24892501A.Mahboubi DoustDepartment of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, 71167-47148, IranDepartment of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, 71167-47148, Iranpaysa.mahboubi@stu.nit.ac.irA.RamiarDepartment of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, 71167-47148, IranDepartment of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, 71167-47148, Iranpaysaramiar@nit.ac.irM.DardelDepartment of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, 71167-47148, IranDepartment of Mechanical Engineering, Babol Noshirvani University of Technology, Babol, Mazandaran, 71167-47148, Iranpaysdardel@nit.ac.irAirfoil Flapping Flexibility Fluid-structure interaction Oscillating Plasma Pitching.[Abdollahzadeh, M., J. Páscoa and P. Oliveira
(2012). Numerical modeling of boundary layer
control using dielectric barrier discharge. In
MEFTE IV Conferencia Nacional em
Mecanica de Fluidos, Termodinamica e
Energia 63.##
Campbell, R. L. (2010). Fluid–structure interaction
and inverse design simulations for flexible
turbomachinery. Submitted in Partial
Fulfillment of the Requirements for the Degree
of Doctor of Philosophy, The Pennsylvania
State University.##
Corke, T. C., M. L. Post and D. M. Orlov (2007).
SDBD Plasma Enhanced Aerodynamics:
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Ducoin, A., J. A. Astol and J. F. Sigrist (2012). An
experimental analysis of fluid structure
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flow regimes including cavitating flow.
European Journal of Mechanics - B/Fluids 36,
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20.##
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Simulations of Self-Sustained Pitch-Heave
Oscillations of a NACA 0012 Airfoil.##
Presented at: 20th Annual Conference of the
CFD Society of Canada, Canmore, Canada.
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32(10), 1965-1983.##]MHD Natural Convection in a Square Enclosure using Nanofluid with the Influence of Thermal Boundary Conditions22Numerical investigation for heat transfer with steady MHD natural convection cooling of a localized heat source at the bottom wall of an enclosure filled with nanofluids subjected to changeable thermal boundary conditions at the sidewalls has been studied in the a presence of inclined magnetic field. Finite difference method was employed to solve the dimensionless governing equations of the problem. The effects of governing parameters, namely, Hartmann number, solid volume fraction, the different values of the heat source length and the different locations of the heat source on the streamlines and isotherms contours as well as maximum temperature, Nusselt number and average Nusselt number along the heat source were considered. The present results are validated by favorable comparisons with previously published results. The results of the problem are presented in graphical and tabular forms and discussed. It is found that an increase in the Hartmann number results in a clear reduction in the rate of heat transfer; however, the increase in Rayleigh number enhances the nanofluid flow and heat transfer rate.25152525M. A.MansourDepartment of Mathematics, Assuit University, Faculty of Science, Assuit, Egypt.Department of Mathematics, Assuit University, Faculty of Science, Assuit, Egypt.paysmansour201354@yahoo.comS. E.AhmedDepartment of Mathematics, South Valley University, Faculty of Science, Qena, Egypt.Department of Mathematics, South Valley University, Faculty of Science, Qena, Egypt.payssameh_sci_math@yahoo.comA. M.RashadDepartment of Mathematics, Aswan University, Faculty of Science, Aswan, Egypt.Department of Mathematics, Aswan University, Faculty of Science, Aswan, Egypt.paysam_rashad@yahoo.comMagnetohydrodynamics Natural convection Square enclosure Configurations Nanofluid.[AbbasianArani, A. A., M. Mahmoodi and S.
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Modeling 20, 214-224.##]2-D Urans Simulations of Vortex Induced Vibrations of Circular Cylinder at Trsl3 Flow Regime22Research on vortex-induced vibrations (VIV) mainly involves experimental science but building laboratory setups to investigate the flow are expensive and time consuming. Computational fluid dynamics (CFD) methods may offer a faster and a cheaper way to understand this phenomenon depending on the solution approach to the problem. The context of this paper is to present the author’s computational approach to solve for vortex-induced vibrations which cover extensive explanations on the mathematical background, the grid structure and the turbulence models implemented. Current computational research on VIV for smooth cylinders is currently restricted to flows that have Reynolds numbers below 10,000. This paper describes the method to approach the problem with URANS and achieves to return satisfactory results for higher Reynolds numbers.The computational approach is first validated with a benchmark experimental study for rather low Reynolds number which falls into TrSL2 flow regime. Then, some numerical results up to Re=130,000, which falls into TrSL3 flow regime,are given at the end of the paper to reveal the validity of the approach for even higher Reynolds numbers.25372544O. K.KinaciNaval Architecture and Maritime Faculty, Yildiz Technical University, Istanbul-34349, TurkeyNaval Architecture and Maritime Faculty, Yildiz Technical University, Istanbul-34349, Turkeypayskemalkinaci@gmail.comVortex-induced vibrations Fluid-induced motions Computational fluid dynamics URANS.[ANSYS Fluent 12 User's Guide. (2009, April).
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Hydrodynamic Analysis of Circular Journal
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Application 9(2), 149-155.##]Analysis of Rotor-Stator Interaction in Turbine Mode of a Pump-Turbine Model22The highest-level fluctuations in large pump-turbines are usually originated from rotor-stator interaction (RSI) in the vaneless region. Hence, the studies of RSI phenomenon and corresponding unsteady effects are significantly important to reduce the pressure fluctuations. In this paper, firstly, RSI in a pump-turbine, featuring 20 stay vanes, 20 guide vanes and 9 runner blades, is analyzed through diameter mode theory, which has been used widely. Then, 3-D unsteady numerical simulations are performed under six guide vane openings in turbine mode. The comparison including performance and pressure characteristics between numerical and experimental results shows a good agreement. Finally, best guide vane opening 21° is chosen to analyze the distribution of pressure fluctuations. The detailed investigation of numerical results shows that frequencies in the vaneless region at best guide vane opening are mainly blade passing frequency (BPF) and its harmonic frequencies caused from RSI. The variation of BPF and its harmonic frequencies is confirmed by diameter mode theory. For this type of the pump-turbine, the amplitude of 2BPF (18fn) shows the highest corresponding diameter mode k2=-2, which indicates two high pressure regions caused by the component of 18fn in the vaneless region. Furthermore, the two high-pressure regions rotate in the counterclockwise direction with rotational speed of the runner blades. This research could provide a basic understanding of RSI to have a further study for pressure fluctuations in pump-turbines.25592568D. Y.LiSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, Chinapayslideyou@hit.edu.cnR. Z.GongSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, Chinapaysgongruzhi@hit.edu.cnH. J.WangSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, Chinapayswanghongjie@hit.edu.cnX. Z.WeiState Key Laboratory of Hydro-Power Equipment, Harbin Institute of Large Electrical Machinery, Harbin, Heilongjiang, 150040, ChinaState Key Laboratory of Hydro-Power Equipment, Harbin Institute of Large Electrical Machinery, Harbin, Heilongjiang, 150040, Chinapaysweixianzhu@hit.edu.cnZ. S.LiuSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, Chinapayslzs@hit.edu.cnD. Q.QinSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, ChinaSchool of Energy Science and Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, Chinapaysqindq@hec-china.comPump-turbine Rotor-stator interaction Turbine mode Vaneless region Diameter mode.[Berten, S., P. Dupont, M. Farhat and F. Avellan
(2007). Rotor-stator interaction induced
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simulations in the stationary components of a
multistage centrifugal pump, Proceedings of
FEDSM2007, 5th Joint ASME/JSME Fluids
Engineering Conference, San Diego, California
USA 37549, 963-970.##
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Meeting of the Workgroup on Cavitation and
Dynamic Problems in Hydraulic Machinery and
Systems, Ljubljana, Slovenia.##
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investigations on pressure fluctuations and
vibration of the impeller in a centrifugal pump
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Engineering 48(1), 136-143.##
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of a pump turbine model. Renewable Energy 77,
32-42.##
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Z. Wei and Z. S. Liu (2015). Dynamic analysis
on pressure fluctuation in vaneless region of a
pump turbine. SCIENCE CHINA Technological
Sciences 58, 813-824.##
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and Y. K. Sun (2012). Numerical investigation
of the hump characteristic of a pump–turbine
based on an improved cavitation model.
Computer and Fluids 68, 105-111.##
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simulation of pressure pulsations in Francis
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Machinery and Systems, Beijing, China 15(6),
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stress of runners of very high head reversible
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Machinery and Systems 4, 289-306.##
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analysis on rotor-stator interaction in a diffuser
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Experimental and numerical analysis of
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Peng and P. Xue (2009). Experimental and
numerical analysis of pressure pulsation in
Francis turbine, Proceedings of FEDSM2008,
2008 ASME Fluids Engineering Conference,
Jacksonville, Florida USA 55238, 1179-1185.##
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X. Z. Wei (2013). Effects of water
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prediction in pump turbine. 26th IAHR
Symposium on Hydraulic Machinery and
Systems, Beijing, China, Tsinghua University.
Yin, J. L., J. T. Liu, L. Q. Wang, L. Jiao, D. Z. Wu
and D. Q. Qin (2010). Performance prediction
and flow analysis in the vaned distributor of a
pump turbine under low flow rate in pump
mode. SCIENCE CHINA Technological
Sciences 53, 3302-3309.##
Zobeiri, A., J. L. Kueny, M. Farhat and F. Avellan.
(2006) Pump-turbine rotor-stator interactions
in generating mode: Pressure fluctuation in
distributor channel. Proceedings of 23th IAHR
Symposium on Hydraulic Machinery and
Systems, Yokohama, Japan 10, 1-10.##]Passive Separation Control on a Symmetric Airfoil via Elastic-Layer22The passive control of flow-separation at averaged Reynolds Number (Re=3.42×105) using self-adapting flexible-flaps in the upper side of the wing, is presented. The two-way Fluid-Structure Interaction (FSI) in an elastic-layer up on the airfoil (NACA 0012) is investigated numerically by Coupling between the Transient Structural and Fluid Flow (Fluent) in ANSYS-Workbench14.0. During the fluid-structure interaction, the transient deformation of the elastic-layer provokes the modification of the flow topology at large-scale. There are reductions of the size and intensity of the vortex-shedding and an increase in the Strouhal number. This explains the increase of the lift-to-drag ratio. The study of the flap flexibility shows that the deformation of the elastic-layer and the variation of aeronautical efforts are inversely proportional to the Young Modulus.25692580C.HafienLaboratory of mechanics of fluids, Faculty of Science of Tunis, 1060 Tunis cedex, Belvidère Laboratory of mechanics of fluids, Faculty of Science of Tunis, 1060 Tunis cedex, Belvidère payschedhli.hafien@gmail.comA.BourehlaAviation School of Borj El-Amri (ASBA), B.P 1142, Tunisia Aviation School of Borj El-Amri (ASBA), B.P 1142, Tunisia paysbourehla@gmail.comM.BouzaianeLaboratory of mechanics of fluids, Faculty of Science of Tunis, 1060 Tunis cedex, Belvidère Laboratory of mechanics of fluids, Faculty of Science of Tunis, 1060 Tunis cedex, Belvidère paysmbouzaiane@yahoo.frFlexible-flaps Young modulus Two-way Fluid-Structure Interaction (FSI) Dynamic mesh.[Bechert, D. W., M. Bruse, W. Hage and R. Meyer
(2000). Fluid Mechanics of Biological Surfaces
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87, 157–171.##
Bourehla, A., C. Hafien and T. Lili (2015).structure
d'un profil d'aile équipé de volets
élastiques. 22ème Congrès Français de Mécanique,
Lyon, 24 au 28 Août 2015.##
Brücker, C. and C. Weidner (2013). Separation
control via self-adaptive hairy flaplet arrays.
ERCOFTAC international symposium
Unsteady separation in fluid-structure
interaction Mykonos, Greece, 17-21.##
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Boswinkle (1955). Aerodynamic characteristics
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reduction by reconfiguration of a poro-elastic
system. Journal of Fluids and Structures 27,
1111–1123.##
Hafien, C., A. Bourehla and T. Lili, (2013).
Simulation numérique d'un écoulement autour
d'un profil d'aile muni d'un volet
poreux. 21ème Congrès Français de
Mécanique, Bordeaux, août 26-30.##
Khalid, S. S., L. Zhang, X. W. Zhang and K. Sun
(2013). Three dimensional numerical simulation
of a vertical axis tidal turbine using the twoway
fluid structure interaction approach.
Journal of Zhejiang University SCIENCE A
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des performances aérodynamiques d'un profil
au moyen d'un actionneur passif auto-adaptatif.
20ème Congrès Français de Mécanique
Besançon, 29 août au 2 septembre.##
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Vehicle Applications. AIAA, Progress in
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Schatz, M., T. Knacke and F. Thiele (2004).
Separation Control by Self-Activated Movable
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and Exhibit 5-8 January /Reno, NV.##
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Reynolds Numbers Using Self Activated
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Venkataraman, D. (2013). Flow control using a
porous, compliant coating of feather-like
actuators. MS thesis, University of Genova,
Department of Civil, Chemical and
Environmental Engineering, Italy.##
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Numerical modeling of flow control on a
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Fluid Dynamics Conference and Exhibit, 28
June- 1 July 2010, Chicago, Illinois, AIAA
4628.##]Simulation of Flow and Heat Transfer of Nanofluid in an Eccentric Annulus with Multicomponent Lattice Boltzmann Method22In the present study, Lattice Boltzmann method is employed to investigate a two dimensional mixed convection heat transfer of Al2O3-water nanofluid in a horizontal annulus between a cold outer cylinder and the hot, rotating inner cylinder. To do so, the double lattice Boltzmann equation is utilized for the base fluid and the nanoparticles to describe the dynamic as well as the thermal behavior of nanofluid. Moreover, different forces such as Brownian, drag and gravity acting on the nanoparticles are taken into consideration. Calculations have been performed for Rayleigh number ranging from 103 to 2×104, Reynolds number from 5 to 120, vertical and horizontal eccentricity from -0.75 to 0.75 with volume fraction of nanoparticles from 0 to 0.1. The current computational results reveal that by adding nanoparticles, the mean Nusselt number for Ra <104 increases as Rayleigh number increases while in the case of Ra >104, it decreases. Also, with Re>80, the mean Nusselt number increases with increasing Reynolds number; although for low Reynolds number this rising trend is not observed. Besides, when the inner cylinder moves vertically upward from the center, the addition of nanoparticles increases Nusselt number relative to the base fluid.25812594A.RostamzadehSchool of Mechanical Engineering, Shiraz University, Shiraz, Iran Molasadra Str., Shiraz, 71936-16548, Iran.School of Mechanical Engineering, Shiraz University, Shiraz, Iran Molasadra Str., Shiraz, 71936-16548, Iran.paysaf_rostamzadeh@yahoo.comE.Goshatsbi RadSchool of Mechanical Engineering, Shiraz University, Shiraz, Iran Molasadra Str., Shiraz, 71936-16548, Iran.School of Mechanical Engineering, Shiraz University, Shiraz, Iran Molasadra Str., Shiraz, 71936-16548, Iran.paysgoshtasb@shiraz.ac.irK.JafarpurSchool of Mechanical Engineering, Shiraz University, Shiraz, Iran Molasadra Str., Shiraz, 71936-16548, Iran.School of Mechanical Engineering, Shiraz University, Shiraz, Iran Molasadra Str., Shiraz, 71936-16548, Iran.payskjafarme@shirazu.ac.irNanofluid Multicomponent lattice Boltzmann method Heat transfer Eccentric annulus Nanoparticles.[Abedini, A., A. B. Rahimi and A. Kianifar (2014).
Numerical study of mixed convection in the
annulus between eccentric rotating cylinders.
Scientia Iranica 21(14), 1403-1414.##
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36(5), 364-374.##]Numerical Solution of the Blasius Equation with Crocco-Wang Transformation22This paper presents a direct second-order ﬁnite-difference solution of the two-point boundary value
problem derived from the classical third-order Blasius problem using the Crocco-Wang transformation.
Noting the end-point singularity introduced by the Crocco-Wang transformation due to a zero
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accuracy. Additionally, the method uses an extrapolation procedure to obtain results of increased accuracy.
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solutions previously reported and ﬁnd that our results are in excellent agreement.25952603A.AsaithambiSchool of Computing, University of North Florida, Jacksonville, FL, 32081, USASchool of Computing, University of North Florida, Jacksonville, FL, 32081, USApaysasai.asaithambi@gmail.comFinite-differences Tridiagonal linear system Second-Order accuracy Wynn’s extrapolation.[Ahmad, F. (2007). Application of Crocco-
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]Unsteady Boundary Layer Flow over a Vertical Surface due to Impulsive and Buoyancy in the Presence of Thermal-Diffusion and Diffusion-Thermo using Bivariate Spectral Relaxation Method22In this article, unsteady boundary layer ﬂow formed over a vertical surface due to impulsive motion
and buoyancy is investigated. The mathematical model which properly accounts for space and
temperature-dependent internal heat source in a ﬂowing ﬂuid is incorporated into the energy equation.
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internal heat generation during the short time period and long time period. Due to the ﬂuid ﬂow
under consideration, the inﬂuence of thermal-diffusion and diffusion-thermo are incorporated into
the governing equation since it may not be realistic to assume that both effects are of smaller order
of magnitude than the effects described by Fourier’s or Fick’s law. The corresponding effect of internal
heat source on viscosity is considered; the viscosity is assumed to vary as a linear function
of temperature. The ﬂow model is described in terms of a highly coupled and nonlinear system of
partial differential equations. The governing equations are non-dimensionalized by using suitable
similarity transformation which unraveled the behavior of the ﬂuid ﬂow at short time and long time
periods. The dimensionless system of non-linear coupled partial differential equations (PDEs) is
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is conducted and results of the surface shear stress, heat transfer and mass transfer at the wall
are illustrated graphically and physical aspects of the problem are discussed.26052619S. S.MotsaSchool of Mathematics, Statistics & Computer Science, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg, 3209, South Africa.School of Mathematics, Statistics & Computer Science, University of KwaZulu-Natal, Private Bag X01, Scottsville, Pietermaritzburg, 3209, South Africa.payssandilemotsa@gmail.comI. L.AnimasaunDepartment of Mathematical Sciences, Federal University of Technology, Akure, Ondo State Nigeria.Department of Mathematical Sciences, Federal University of Technology, Akure, Ondo State Nigeria.paysanizakph2007@gmail.comUnsteady Mixed convection Impulsive motion Variable viscosity Bivariate Spectral Relaxation method Space-heat source.[
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]Effect of Variable Gravity on Darcy Flow with Impressed Horizontal Gradient and Viscous Dissipation22The effect of variable gravity on the free convection in a horizontal porous layer with viscous dissipation
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drastic decrease in the value of critical horizontal Rayleigh number when modiﬁed variable gravity
parameter changes from 1 to 1.26212628K.RoyDepartment of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, W. B., IndiaDepartment of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, W. B., Indiapayskomolika.roy89@gmail.comP. MurthyDepartment of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, W. B., IndiaDepartment of Mathematics, Indian Institute of Technology Kharagpur, Kharagpur 721302, W. B., Indiapayspvsnm@maths.iitkgp.ernet.inDarcy ﬂow Variable gravity Viscous dissipation.[Alex, S. and P. Patil (2001). Effect of variable
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]Interaction of an Acceleration Wave with a Strong Shock in Transient Pinched Plasma22In this paper, the evolution of an acceleration wave for the system of partial differential equations
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vestigated. Effects of ambient density exponent and magnetic induction has
been investigated.26292634J.JenaNetaji Subhas Institute of Technology Sector-3, Dwarka, New Delhi - 110 078 IndiaNetaji Subhas Institute of Technology Sector-3, Dwarka, New Delhi - 110 078 Indiapaysjjena67@rediffmail.comM.ChadhaNetaji Subhas Institute of Technology Sector-3, Dwarka, New Delhi - 110 078 IndiaNetaji Subhas Institute of Technology Sector-3, Dwarka, New Delhi - 110 078 Indiapaysmeerac9a@yahoo.co.inShock wave Acceleration Wave Interaction of waves Plasma.[Boillat, G. and T. Ruggeri (1979a). On evolution
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