transient mhd free convective flow of an optically thick gray gas past a moving vertical plate in the presence of thermal radiation and mass diffusion

The purpose of present investigation is to analyse bouyancy-driven radiation-convection flow past a moving vertical plate with reference to an optically dense medium in the presence of mass concentration, using rosseland approximation permeated by a magnetic field. the flow is considered to be gray in the presence of free convection, mass transfer and radiation. an exact solution of the governing equations is obtained by applying the laplace transform method. numerical results of velocity distributions, shear stress, temperature distribution and mass concentration are presented graphically to give physical insight into the flow pattern.