INFLUENCE OF THERMAL RADIATION ON MOVING INFINITE VERTICAL PLATE

Abstract

The present analysis aims at the free convective flow past an impulsively started vertical plate with constant heat flux in the presence of thermal radiation. The analytical expressions for the velocity and temperature are obtained in the best possible closed form and are analyzed graphically in detail with respect to various parameters. The influence of all such parameters are examined and discussed qualitatively. It is seen that, as the prandtl number increases, the fluid velocity increases and also as the pore size is increased, the fluid velocity decreases marginally. Also, the velocity profiles are found to be oscillatory in their behavior and the amplitude of such sinusoidal motion is found to be decreasing as we move far away from the boundary. Further, as the radiation parameter increases, the velocity of the fluid is found to be decreasing, and of course with the diminishing amplitude. For a fixed Prandtl number, the influence of the Grashoff number when examined, it is seen that, the velocity profiles are oscillatory in its nature. It is observed that, increase in Prandtl number contributes to the increase in skin friction while increase in Grashoff number causes skin friction to decrease. Not much of apparent change in skin friction is observed even for the significant change in the radiation parameter.
Key words: Thermal radiation, constant heat flux, impulsive motion.