Published Paper Details:

The unsteady two-dimensional flow of a non-Newtonian fluid over a stretching surface having a prescribed surface temperature in the presence of radiation and suction/injection is investigated. The Casson fluid model is used to characterise the non-Newtonian fluid behaviour. Similarity transformations are employed to transform the governing partial differential equations into ordinary differential equations. The transformed equations are then solved numerically by Bvp4cMatlab olver. The flow features and heat transfer characteristics for different values of the governing parameters viz. unsteadiness parameter, Casson parameter, radiation parameter, Prandtl number and suction/injection parameter are analyzed and discussed in detail. Fluid velocity initially decreases with increasing unsteadiness parameter and temperature as well as concentration decreases significantly due to unsteadiness. The effect of increasing values of the Casson parameter is to suppress the velocity field. But the temperature and concentration is enhanced with increasing Casson parameter. Both the momentum and thermal boundary layer thicknessdecreases in an increasing suction/injection parameter. Magnitude of skin-friction reduces,but the rate of heat transfer increases with raising the suction/injection parameter.