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Magnetoconvection on the double diffusive Al2O3-water nanofluid in a porous medium filled an annular space between vertical cylinders with discrete heat flux
Author(s): Mohamed Sammouda, Kamal Gueraoui
Keywords: Nanofluid, double diffusive magnetoconvection, heat flux, porous media, cylindrical annulus, finite-difference method.
In the present study, the phenomenon of double diffusive magnetoconvection in an annular space between vertical cylinders filled with a porous medium saturated by a Newtonian Al2O3-water nanofluid has been investigated. The transport equations for vorticity, energy and concentration as well as stream function are solved with the aid of the finite difference method. The outer cylinder is maintained at lower temperatures and concentrations, the discrete heat source and unheated adiabatic portions as well as the higher concentrations are placed on the inner cylinder while the lower and upper walls are kept as insulated and impermeable. Magnetic field of constant strength is applied along the vertical direction. The results of the numerical simulation obtained, presented in terms of streamlines, isotherms, isoconcentrations, Nusselt and Sherwood numbers are portrayed to demonstrate the consequences of Rayleigh, Hartmann and buoyancy ratio numbers as well the solid nanoparticles volume fraction on the flow pattern, temperature and concentration distributions and the heat and mass transfer. It is observed that the transferred thermal flux and mass transfer increases as Rayleigh number and buoyancy ratio increases, and the larger magnetism declines heat and mass transport rate.

Journal of Applied Fluid Mechanics

The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating.

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