A General Approach for Flow Optimization and Drag Reduction in Turbulent Pipe Flows

Document Type : Regular Article

Authors

1 State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, Zhejiang, 310027, China

2 Shanghai Institute for Advanced Study of Zhejiang University,Shanghai 200120,China

Abstract

Flow optimization and drag reduction are of great importance in industrial applications. However, most of the structural optimization and drag reduction in pipe flows are based on industrial experience or a large number of experiments, and there is a lack of general theoretical guidance. In the present work, a general approach for flow optimization and drag reduction in turbulent pipe flows is developed based on the irreversibility of flow process and the principle of minimum mechanical energy dissipation. Considering that the effective viscosity coefficient is related to the space coordinates, the field synergy equation of turbulent flow is derived. The reliability and performance of the field synergy principle of turbulent flow as well as the general approach are then evaluated and validated in a turbulent parallel flow conduit, and finally applied to industrial pipe flows. It demonstrates that the present approach is able to optimize flow field for different purposes by adding speed splitter or deflector as an interface at proper locations to alter the interactions between fluid and wall. It is robust and easy to implement, which provides general theoretical guidance for flow optimization and drag reduction in turbulent pipe flows.

Keywords

References

Addy, A. L., M. J. Morris and J. C. Dutton (1985). An investigation of compressible flow characteristics of butterfly valves. Journal of Fluids Engineering 107(4), 512.##
Chen, Q., J. Ren and J. A. Meng (2007). Field synergy equation for turbulent heat transfer and its application. International Journal of Heat and Mass Transfer 50(25-26), 5334-5339.##
Chen, Q., J. Ren and Z. Guo (2008). Fluid flow field synergy principle and its application to drag reduction. Chinese Science Bulletin 53(11), 1768-1772.##
Dutta, P., S. K. Saha, N. Nandi and N. Pal (2016). Numerical study on flow separation in 90° pipe bend under high Reynolds number by k-ε modelling. Engineering Science and Technology, an International Journal 19(2), 904-910.##
Guo, Z. Y., D. Y. Li and B. X. Wang (1998). A novel concept for convective heat transfer enhancement. International Journal of Heat and Mass Transfer 41(14), 2221-2225.##
Hu, X. P., Y. X. Hong and X. H. Deng (2012). Numerical Simulation of Laminar Heat Transfer Enhancement in Tube Side. Guangzhou Chemical Industry 40(03), 36-39.##
Hui, W. (2014, February). Numerical simulation of turbulent flow behind a butterfly valve placed in a dual-elbow channel and its experimental analysis. Master thesis, Shanghai Jiao Tong University, Shanghai, China.##
Jia, X. H., X. H. Peng and X. S. Long (2011). Numerical Simulation and Optimization of Flow Field in Elbow Pipes with Baffle. Journal of Southwest University (Natural Science Edition) 33(3), 139-143.##
Khanorkar, P. M. and R. E. Thombre (2013). CFD analysis of natural convection flow through vertical pipe. Int. J. Mech. Eng. & Rob. Res 2, 371-378.##
Kim, J., M. Yadav and S. Kim (2014). Characteristics of secondary flow induced by 90-degree elbow in turbulent pipe flow. Engineering Applications of Computational Fluid Mechanics 8(2), 229-239.##
Lu, G. (2014, May). The Study on the Turbulent Field Synergy model and its Application to Drag Reduction. Master thesis, Dalian University of Technology, Liaoning, China.##
Lv, J. S. (2014, September). Fundamental Study on the Fluid Flow Analysis Using Field Synergy Principle. Ph. D. thesis, Dalian University of Technology, Liaoning, China.##
Marjavaara, B. D. and T. S. Lundström (2006). Redesign of a sharp heel draft tube by a validated CFD‐optimization. International journal for numerical methods in fluids 50(8), 911-924.##
Okafor, C. V., O. R. Ononye and A. U. Okeke (2020). Analysis of Water Flow in Tee-junction Pipes Using CFD. Journal of Multidisciplinary Engineering Science and Technology (JMEST) 7(3),11550-11553.##
Rao, Y., K. Chang, S. Wang, L. I. Jianmin and M. Yang (2016) Numerical simulation of fluid flow characteristic in 90° bend pipe. Journal of Changzhou University (Natural Science Edition) 28(3),65-69.##
Rao, A. (2018). Cfd simulation of fluid flow through T, Y and y-junction of pipes. LAMBERT Academic Publishing.##
Rodriguez, S. (2019). Applied computational fluid dynamics and turbulence modeling. Springer International Publishing.##
Tao, W. Q. (2001). Numerical heat transfer (the Second Edition). Xi’an: Xi’an Jiaotong University Press, China.##
Tao, H., H. Chen, J. Xie, Z. Shu, Y. Hu and H. Lu (2010). Flow uniformity index based on area-weighted and mass-weighted average velocity. CIESC Journal S 2,116-120.##
Tao, W. Q., Y. L. He and L. Chen (2019). A comprehensive review and comparison on heatline concept and field synergy principle. International Journal of Heat and Mass Transfer 135, 436-459.##
Wu, G. (2013, May). Numerical Simulation for dynamic characteristics of axial flow check. Master thesis, Lanzhou University of Technology, Gansu, China.##
Yang, G., G. Wu, X. Liu, W. Cao and M. Xu (2013). Dynamic characteristics of axial flow check valve. Journal of Drainage and Irrigation Machinery Engineering/ Paiguan Jixie Gongcheng Xuebao 31(1), 46-49.##
Yue, Z. H. A. O. (2011, March). Numerical Simulation on Local Resistance Based on CFD. Master Thesis, Northeast Petroleum University, Heilongjiang, China.##
Zhang, B., J. Lv and J. Zuo (2014). Compressible fluid flow field synergy principle and its application to drag reduction in variable-cross-section pipeline. International Journal of Heat and Mass Transfer 77, 1095-1101.##
Zhao, H., M. Ma and X. Su (2015). Internal flow field simulation and design optimization based on CFD pipeline pig structure. Oil & Gas Storage and Transportation 05,562-566.##
Zuo, J. (2012, May). Study on The Optimal Design of The Vapour Ejector with Field Synergy Principle. Master thesis, Dalian University of Technology, Liaoning, China##
 
Journal of Applied Fluid Mechanics
Volume 15, Issue 3 - Serial Number 64
May and June 2022
Pages 815-829

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History

  • Received: 13 July 2021
  • Revised: 25 December 2021
  • Accepted: 04 January 2022
  • Available online: 18 March 2022

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