HEAT TRANSFER IN AXIALLY MOVING MICRO - CONCENTRIC -POROUS CYLINDERS

This paper investigates analytically the hydrodynamic and thermal behavior of fluid in axially moving micro - concentric – porous (MCP) cylinders taking into account the velocity slip and temperature jump at the outer surface of inner porous cylinder and inner surface of outer porous cylinder. The solution of the governing equations has been obtained. The effect of various flow parameters entering into the problem such as suction/injection, rarefaction, fluid – wall interaction and radius ratio are discussed with the aid of line graphs. The result shows that as suction/injection on the cylinder surfaces increases, the fluid velocity and temperature decreases. Furthermore, it is found that the velocity slip and temperature jump at the inner moving porous cylinder surface is much greater than its value at the outer stationary one.