Unsteady MHD convective heat and mass Transfer past a semiinfinite vertical porous plate with variable viscosity and thermal conductivity

In this article, we studied the effects of variable viscosity and thermal conductivity on an unsteady two-dimensional laminar flow of a viscous incompressible electrically conducting fluid past a semi-infinite vertical porous moving plate taking into account the mass transfer. The fluid viscosity is assumed to vary as a linear function of temperature. It is assumed that the porous plate moves with a constant velocity in the direction of fluid flow, and the free stream velocity follows the exponentially increasing small perturbation law. The governing equations for the flow are transformed into a system of non-linear ordinary differential equations by perturbation technique and are solved numerically by using the shooting method. The effects of the various parameters on the velocity, temperature and concentration profiles are presented graphically and the skin-friction coefficient, Nusselt number and Sherwood number at the plate are shown in Tables.