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Diffusion-thermo and radiation effects on mhd free convective heat and mass transfer flow past an infinite vertical plate in the presence of a chemical reaction of first order

This paper presents an exact solution to study chemical reaction, diffusion-thermo (Dufour effect) and radiation effects on unsteady MHD free convective heat and mass transfer flow past an impulsively started infinite vertical plate with variable mass diffusion in the presence of applied transverse magnetic field. Initially, it is assumed that the plate and surrounding fluid are maintaining a temperature ¥ ¢ T in stationary condition with concentration levels ¥ ¢ C at all the points in entire flow region. At time t > 0, the plate is given an impulsive motion moving with a uniform velocity 0 u . And at the same time the plate temperature is raised to w T¢ and the level of concentration near the plate is raised linearly with time t. The dimensionless governing equations involved in the present analysis are solved using the Laplace transform technique. Non-dimensional velocity, temperature and concentration profiles are then presented graphically for different values of parameters entering into the problem while the numerical computations of skin-friction are presented in a tabular form.

Author(s): K. Raveendra Babu A.G. Vijaya Kumar and S.V.K. Varma

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