UDC 536.25

K. Govardhan1, N. Kishan2, and B. Balaswamy2

EFFECT OF VISCOUS DISSIPATION AND RADIATION ON MHD GAS FLOW AND HEAT AND MASS TRANSFER OVER A STRETCHING SURFACE WITH A UNIFORM FREE STREAM
The influence of radiation on a steady free convective flow and heat and mass transfer over an isothermal stretching sheet in the presence of a uniform magnetic field is considered with regard to the viscous dissipation effect. The governing partial differential equations are converted into a system of nonlinear ordinary differential ones via similarity transformations. The resulting system of coupled nonlinear ordinary differential equations is solved numerically by using the Adams-Moulton predictor-corrector method and the shooting one. The numerical results for the velocity, temperature, and concentration profiles are presented, showing their dependence on the flow parameters. The effect of the radiation and magnetic field parameters on the shear stress and heat flux is discussed. Keywords: MHD, radiation, viscous dissipation, free convection, stretching sheet, heat and mass transfer. 1Department of Mathematics, Gitam University, Hyderabad, A. P., India; email: govardhan_kmtm@yahoo.co.in; 2Department of Mathematics, Osmania University, Hyderabad-500007, A. P., India. Original article submitted August 1, 2011; revision submitted March 16, 2012.