Darcy-Benard double diffusive Marangoni convection in a composite layer system with constant heat source along with non uniform temperature gradients

The problem of Benard double diffusive Marangoni convection is investigated in a horizontally infinite composite layer system enclosed by adiabatic boundaries for Darcy model. This subjected to three temperature gradients with constant heat sources both the layers. lower boundary porous region rigid and upper fluid free effects. Eigenvalue ordinary differential equations solved closed form Thermal number, which happens be Eigen value. different profiles considered are linear, parabolic inverted corresponding thermal numbers obtained. impact parameter, modified internal Rayleigh solute diffusivity ratio on Darcy-Benard detail.