Abstract
Abstract The present paper intended to analyze the effect of thermal diffusion (Soret) and diffusion-thermo (Dufour) effect on MHD viscoelastic fluid flow over a porous vertical stretching sheet subject to variable magnetic field embedded in a porous medium in the presence of chemical reaction and heat source/sink. The method of solution involves similarity transformation. The coupled nonlinear partial differential equations governing flow, heat and mass transfer phenomena are reduced into set of nonlinear ordinary differential equations. The transformed equations are solved numerically by using Runge-Kutta fourth order method followed by shooting technique. The effects of various parameters on the velocity, temperature and concentration fields are analyzed with the help of graphs. The numerical computation of skin friction, Nusselt number and Sherwood number is presented in a table. For validity of the numerical method applied here the work of previous authors is compared with the present one as a particular case by omitting the porosity, heat source/sink and chemical reaction parameters.
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