diffusion-thermo effects on mhd free convective radiative and chemically reactive boundary layer flow through a porous medium over a vertical plate

The main purpose of this work is to investigate the porous medium and diffusionthermo effects on unsteady combined convection magneto hydrodynamics boundary layer flow of viscous electrically conducting fluid over a vertical permeable surface embedded in a high porous medium, in the presence of first order chemical reaction and thermal radiation. the slip boundary condition is applied at the porous interface. a uniform magnetic field is applied normal to the direction of the fluid flow. the nonlinear coupled partial differential equation are solved by perturbation method and obtained the expressions for concentration, temperature and velocity fields. the rate of mass transfer in terms of sherwood number  , the rate of heat transfer in terms of nusselt number   and the skin friction coefficient  are also derived. the profiles of fluid flow quantities for various values of physical parameters are presented and analyzed. profiles of fluid flow quantities for various values of physical parameters are presented and analyzed.