Abstract:

The numerical study of magnetoconvection in a cylinder filled with a porous medium saturated by a metallic nanofluid consisting of aluminum nanoparticles and binary base fluid is performed. The sidewalls of the enclosure are rigid, impermeable, and adiabatic, while the horizontal walls are maintained at uniform temperatures and concentrations. The flow of the nanofluid at the porous layers is described by the Brinkman-Forscheimer extended Darcy law using the Boussinesq approximation. The finite volume method is used to solve the conservation equations for energy, concentration, and momentum. The effect of varying Hartmann, Rayleigh, Darcy, Soret and Dufour, and Prandtl numbers, buoyancy ratio, geometric aspect ratio on the axial and radial velocities, and the heat and mass transfer is studied.


Keywords and phrases:

nanofluid, magnetoconvection, porous medium, extension of the law of Darcy, Soret and Dufour effects.