Non-Uniform Temperature Gradients Impact on Rayleigh-Darcy Convection : A Composite System with Couple Stress Fluid

The impact of non-uniform temperature gradients on Rayleigh-Darcy convection in a composite system couple stress fluid is discussed. bounded by stress-free surfaces and adiabatically insulated, the fluid-porous layers are coupled employing appropriate interfacial boundary conditions. To determine eigen value, regular perturbation method used. effect dimensionless parameters analysed graphically, it demonstrated that parameter viscosity ratio stabilise system, while opposite observed for Darcy number thermal diffusivity ratio.