Stability of a chemically reacting double-diffusive fluid layer in a porous medium

In the present study, double-diffusive convection with chemical reaction in a Darcy-Brinkman porous layer, heated and salted below, has been investigated. Linear analysis is performed with the help of the normal mode technique, and nonlinear analysis is performed with the help of the energy method. The effect of the thermal contribution of the chemical reaction is found to be more effective on the convective instability in comparison with the solutal contribution of the chemical reaction. The reaction parameters k(1), k(2) enhance the onset of convection in the stationary mode, however, in oscillatory mode, the onset of convection is seen to be delayed. The effect of solute Rayleigh number Rs, Darcy number Da, is depicted graphically.