DOUBLE DIFFUSIVE CONVECTION IN A BINARY VISCOELASTIC FLUID SATURATED POROUS LAYER WITH SORET EFFECT AND INTERNAL HEAT SOURCE

Abstract

In this paper, we have investigated the effect of Soret parameter on the onset of double diffusive convection in a binary viscoelastic fluid saturated porous layer with internal heat source using linear stability theory which is based on the normal mode technique. The effect of Soret parameter, normalized porosity, the Lewis number, internal Rayleigh number and the Darcy-Prandtl number on the stability of a system is shown graphically. From this study we find that the effect of negative Soret parameter stabilizes the system while destabilizes the system for positive Soret parameter for oscillatory mode. The Lewis number , normalized porosity , and internal Rayleigh number  have stabilizing effects. The effect of Darcy –Prandtl number  destabilizes the system for oscillatory convection.