• RADIATION EFFECTS ON UNSTEADY MHD FLOW OVER A VERTICAL PLATE WITH RAMPED WALL TEMPERATURE IN THE PRESENCE OF CHEMICAL REACTION

B. PRABHAKAR REDDY*

Abstract


The effects of radiation on unsteady MHD free convection flow of an incompressible viscous, electrically conducting fluid near an infinite vertical plate with ramped wall temperature in the presence of chemical reaction has been studied. The motion of the plate is a rectilinear translation with an arbitrary time dependent velocity. The radiative flux is described using the differential approximation for radiation. The partial differential equations governing the flow are transformed into a non-dimensional form and are solved by Ritz FEM. The results obtained are discussed for the influence of magnetic field that is fixed relative to the fluid and plate. It has been found that when the thermal and mass Grashof numbers are increase, the thermal and concentration buoyancy effects are enhanced and the fluid velocity increases. Furthermore, when the magnetic field, heat absorption parameter and chemical reaction parameter increase the fluid velocity decrease. These results are in good agreement with earlier results.


Keywords


Radiation, MHD, free convection, ramped wall temperature, chemical reaction.

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