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1 International Journal of Applied Mechanics and Engineering

1 2009

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Effect of thermal radiation on MHD free convection heat and mass transfer with double diffusion from vertical surfaces in porous media

Tak S. S., Khan A., Lodha A.

International Journal of Applied Mechanics and Engineering

2009

Vol. 14, no 1

295-303

The effect of thermal radiation on heat and mass transfer characteristics of natural convection about a vertical surface embedded in a saturated Darcian porous medium subjected to a magnetic field is studied taking into account the Soret and Dufour effects. The Rosseland approximation for the radiative heat flux is used in the energy equation. It is found that the similarity solution exists in the present case. The resulting set of coupled non-linear ordinary differential equations is solved numerically using the shooting technique. Dimensionless velocity, temperature and concentration profiles are presented graphically for various values of the radiation parameter and the Nusselt and Sherwood numbers are tabulated for different values of the involved parameters. It is found that the Nusselt number increases and Sherwood number decreases as the radiation parameter increases but both the Nusselt number and Sherwood number decrease as the magnetic field parameter increases.