• THERMAL RADIATION EFFECT ON AN UNSTEADY MHD MIXED CONVECTIVE VISCOUS DISSIPATIVE FLUID FLOW PAST A MOVING ACCELERATED VERTICAL POROUS PLATE

Mamta Thakur*, M. Venkata Krishna

Abstract


A numerical study is presented on the effect of thermal radiation on an unsteady magnetohydrodynamic mixed convective flow of a viscous incompressible fluid past a moving accelerated vertical plate embedded in a porous medium on taking viscous dissipation into account has been studied. The fluid is considered to be a gray, absorbing emitting but non – scattering medium and the Rossel and approximation is used to describe the radiative heat flux in the energy equation. The dimensionless governing coupled, non – linear boundary layer partial differential equations are solved by an efficient finite element method. The variations of the fluid velocity, temperature and concentration fields with the help of different flow parameters viz. thermal Grashof number, solutal Grashof number, Hartmann number, Permeability parameter, Suction parameter, thermal radiation parameter, Prandtl number, Schmidt number and Eckert number are presented graphically. And also, the effects these flow parameters on Skin – friction, Rate of heat and mass transfer are discussed through tabular forms. This model finds applications in geophysics, astrophysics and also in the design of high temperature industrial processing systems.


Keywords


Thermal radiation, Free convection, Porous medium, Viscous dissipation and Finite element method.

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