Double Diffusive Convection and Internal Heat Generation with Soret and Dufour Effects over an Accelerating Surface with Variable Viscosity and Permeability

Abstract

The study deals with the coupled highly non-linear partial differential equations for the effects of internal heat generation (IHG), combined effects of Soret and Dufour with variable fluid properties like variable porosity, permeability and viscosity on thermal and diffusion mixed (free and forced) convection flow fluid through porous media over moving surface. The numerical computation has been carried out for other additional terms like internal heat generation (IHG), viscous dissipation and ohmic effect. We have drawn the numerical results and presented graphically for the flow characteristics like velocity, temperature and concentration for the effect of IHG, Soret and Dufour effects on mixed (free and forced) convective flow with variable fluid properties for various non-dimensional parameters namely prandtl number, Eckert number, porous parameter, viscosity parameter, Soret number and Dufour number of the problem using the shooting technique. In the absence of the additional terms and for constant viscosity our computational results are compared with the earlier works and found to be good agreement.

Keywords:Double diffusive, internal heat generation (IHG), Soret and Dufour effects, variable permeability, accelerating surface.