Radiation effect on unsteady free convection and mass transfer flow between two vertical parallel plates with Newtonian heating

Abstract

The purpose of this study is to investigate analytically free convection flow between two vertical parallel plates with Newtonian heating and mass diffusion. Radiation also taken into consideration. Appropriate non-dimensional variables are used to transform the dimensional governing equations. The velocity, temperature and concentration profiles are solved analytically using Laplace Transform technique. The corresponding expressions for skin friction and Nusselt number are also calculated. The graphical results are displayed to illustrate the influence of Newtonian heating parameter, thermal radiation parameter, Prandtl number and Schmidt number. The effect of Newtonian heating parameter is observed whereby it increases the Nusselt number but decreases the skin friction. Results also shown that, Nusselt number decreases when radiation increases meanwhile skin friction decreases when radiation parameter increases.