• EFFECT OF RADIATION AND ROTATION ON UNSTEADY MHD FLOW PAST AN IMPULSIVELY STARTED VERTICAL PLATE WITH VARIABLE MASS DIFFUSION IN POROUS MEDIUM IN THE PRESENCE OF HALL CURRENT

Abstract

The present study is carried out to examine the effects of rotation, radiation and Hall current on unsteady free convection flow of a viscous, incompressible and electrically conducting fluid past an impulsively started vertical plate in a porous medium under the influence of transversely applied uniform magnetic field. Exact solution of energy equation is obtained in closed form by Laplace transform technique, and solution of momentum equation is obtained by defining a complex variable. The expression for the shear stress at the plate due to the primary and secondary flows is obtained. The results obtained are shown by graphs and table. Applications of the study arise in magnetic field control of materials processing systems, planetary and solar plasma fluid dynamics systems and rotating MHD induction machine energy generators etc.