An analysis of MHD effects on unsteady free convection and mass transfer over a moving isothermal vertical plate in a rotating fluid in the presence of thermal radiation and viscous dissipation with Ohmic heating were presented. An exact solution is obtained for the axial and transverse components of the velocity by defining a complex velocity. The effects of velocity, temperature and concentration for different parameters like radiation parameter, rotation parameter, magnetic field parameter, Schmidt number, thermal Grashof number, mass Grashof number, Prandtl number and time on the plate are discussed. Keywords: Magnetic field, Radiation, rotation, mass transfer, vertical plate, heat source.
I.INTRODUCTION The study of hydromagnetic flow is called hydromagnetics or magnetohydrodynamics (MHD), which studies the dynamics of electrically conducting fluids. The set of equations which describe MHD are a combination of the Navier-Stokes equation of fluid dynamics and Maxwell's equations of electromagnetism. Radiative heat and mass transfer play an important role in manufacturing industries for the design of reliable equipment, Nuclear power plants, gas turbines and various propulsion devices for aircraft, missiles, satellites and space vehicles. The effect of Coriolis force has wide applications in science and technology. Viskanta and Grosh [15] studied the transfer of energy in boundary layer flow of an incompressible and radiating medium over wedge. The Rosseland approximation for the radiant heat flux vector was used to simplify the energy equation. Arpaci [22] studied the interaction between thermal radiation and laminar convection of heated vertical plate in a stagnant radiating gas. Greenspan