Influence of Soret and Dufour effect on MHD flow over an exponential stretching sheet: A numerical study

Abstract

The present paper analyzes the effect of chemical reaction on free convection MHD motion of steady, laminar, incompressible liquid under the influence of heat source/sink. The motion is considered over an exponential radiative extending surface with a magnetic field. An appropriate similar transformation is employed to convert the nonlinear system of partial differential equations (PDEs) to a set of ordinary differential equations (ODEs). Due to the high nonlinearity, the analytical approach for these coupled nonlinear equations does not hold good. Therefore, these transformed ODEs are solved by using numerical techniques adopting Runge-Kutta fourth-order method accompanied by shooting technique. The behavior of different physical parameters on the motion phenomena is shown via diagrams. However, as a concluding remark, the major outcomes of the present investigation are described as: the buoyant forces overshoot the velocity profile significantly whereas the fluid temperature retards with an increasing Soret number. Finally, the chemical reaction parameter favors retard the concentration profiles resulted in reducing the thickness of the solutal boundary layer.