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Mathematical Problems in Engineering
Volume 2013, Article ID 148410, 7 pages
http://dx.doi.org/10.1155/2013/148410
Research Article

Radiation and Magnetohydrodynamics Effects on Unsteady Free Convection Flow in a Porous Medium

Department of Mathematical Sciences, Faculty of Science, Universiti Teknologi Malaysia, 81310 Skudai, Malaysia

Received 21 April 2013; Revised 7 July 2013; Accepted 7 July 2013

Academic Editor: Waqar Khan

Copyright © 2013 Sami Ulhaq et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The unsteady MHD free convection flow near an exponentially accelerated infinite vertical plate through porous medium with uniform heat flux in the presence of thermal radiation has been considered. The mathematical model, under the usual Boussinesq approximation, was reduced to a system of coupled linear partial differential equations for velocity and temperature. Exact solutions are obtained by the Laplace transform method. The influence of pertinent parameters such as the radiation parameter, Grashof number, Prandtl number, and time on velocity, temperature, and skin friction is shown by graphs.