**Soret And Dufour Effects On Unsteady Mhd Free Convective Mass Transfer Flow Past An Infinite Vertical Porous Plate With Oscillatory Suction Velocity In The Presence Of Thermal Radiation**

**V.Srinivasa Rao and L.Anand Babu**

Department of Mathematics, University College of Science, Osmania University, Hyderabad-07, (A.P), India. Email: uhita@yahoo.com

**ABSTRACT**

An analysis of free convection and mass transfer unsteady magnetohydrodynamic flow of an electrically conducting viscous incompressible fluid past an infinite vertical porous plate under oscillatory suction velocity and thermal radiation by taking into account the Dufour (diffusion thermo) and Soret (thermal diffusion) effects. The problem is solved numerically by using finite element method for velocity, temperature and concentration field and also the expression for skin friction, rate of heat and mass transfer have been obtained. The results obtained have been presented numerically through graphs and tables for externally cooled plate (Gr > 0) and externally heated plate (Gr < 0) to observe the effects of various parameters encountered in the equations.

Key words: Mass transfer, MHD flow, vertical plate, suction velocity, Soret and Dufour numbers, thermal radiation, finite element method.

**International
eJournal of Mathematics and Engineering**

Volume 1, Issue 3, Pages: 453 – 471