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Hydromagnetic Boundary Layer Flow over Stretching Surface with Thermal Radiation

The quality of final product in many metallurgical and technological processes is found to be significantly influenced by the hydromagnetic flow and thermal radiation. Magnetic field exerts drag forces in electrically conducting fluid and thermal radiation influences the rate of heat transfer. In this paper, the magnetohydrodynamics (MHD) boundary layer flow in viscous fluid over a stretching sheet with radiation effects is studied. The stretching velocity and temperature of the sheet are assumed to follow the power law. The governing boundary layer equations of partial differential equations are transformed into a system of ordinary differential equations by similarity transformation. The system is solved numerically using Runge-Kutta-Fehlberg method with shooting technique in the Maple software environment. The effects of magnetic parameter M, temperature exponent n, Prandtl number Pr and thermal radiation parameter N on the surface skin friction coefficient, surface heat transfer coefficient and velocity and temperature boundary layers are analysed. The magnetic parameter decreases the skin friction coefficient thus reduces the momentum boundary layer thickness. The magnetic parameter, Prandtl number and thermal radiation parameter decrease the heat transfer coefficient and therefore, the thermal boundary layer thickness increases.