Heat and Mass Transfer Effects on Unsteady MHD RadiativeFlow of a Chemically Reacting Fluid Pastan Impulsively Started Vertical Plate

The interaction of free convection with thermal radiation of viscous in-compressible MHD unsteady chemical reacting fluid flow past an impulsively startedvertical plate is analyzed. The Rosseland approximation is used to describe the ra-diative heat transfer in the limit of the optically thin fluid. The non-linear, coupledequations are solved using an implicit finite difference scheme of Crank-Nicolson type.Velocity, temperature and concentration of the flow have been presented for variousparameters such as thermal Grashof number, mass Grashof number, Prandtl number,Schmidt number, radiation parameter and magnetic parameter. The local and averageskin friction, Nusslet number and Sherwood number are also presented graphically. Itis observed that, when the radiation parameter increases the velocity and temperaturedecrease in the boundary layer. Also, it is found that the presence of chemical reac-tion parameter leads to decrease in the velocity field and concentration and rise in thethermal boundary thickness.