• THE STUDY OF DOUBLE DIFFUSIVE NATURAL CONVECTION IN ANISOTROPIC POROUS RECTANGULAR CHANNEL USING A LOCAL THERMAL NON-EQUILIBRIUM MODEL

Abstract

The effect of local thermal non-equilibrium on double diffusive convection in a rectangular channel filled with anisotropic porous media is considered, when the fluid and solid phases are not in local thermal equilibrium. Walls of the channels are non-uniformly heated to establish a linear temperature gradient and they are assumed to be impermeable and perfectly conducting. Darcy model with anisotropy permeability is used to describe the flow and a two field model is used for energy equation each representing fluid and solid phase separately. The critical Rayleigh number for the onset of convection using linear stability analysis obtained numerically as a function of mechanical anisotropy parameters, interphase heat transfer coefficient, solutal Rayleigh number, aspect ratio and results are investigated.