The Effect of Linear, Parabolic and Inverted Parabolic Salinity Gradients on The Onset of Darcy Brinkman Rayleigh Benard Two-Component Convection in a Two-Layered System with Dufour Effect

The physical configuration of the problem Darcy Brinkman (DB) Rayleigh Benard Two-Component (RBTC) Convection in a two-layered system has been investigated for linear, parabolic and inverted salinity gradients with Dufour effect. For fluid layer, upper boundary is free surface tension porous lower rigid. At interface, normal velocity, stress, shear mass, mass flux, heat, heat flux are continuous. regular perturbation method used to solve resulting ordinary differential equations obtained from mode expansion. effect different parameters on number versus depth ratio discussed results presented graphically.