HEAT TRANSFER AND FLUID FLOW PAST A CIRCULAR CYLINDER BETWEEN PARALLEL WALLS

This paper presents a numerical study on heat transfer and fluid flow for unsteady, incompressible, Newtonian fluid past a circular cylinder in between confined walls, based on Thompson, Thames, Mastin (TTM) method of automatic boundary fitted co-ordinate generation system. Finite difference implicit method, based on vorticitystream function formulation with uniform inlet flow conditions, is employed for unsteady state computations for Reynolds numbers in the range 50-150. Time-dependent periodic behavior of stream lines for Reynolds number from 50 up to 150 shows periodicity of flow field. The time-evolution of Nusselt number, averaged over the surface of the cylinder, for different Reynolds numbers are shown. The frequency of vortex shedding and the amplitude of the fluctuating average Nusselt number increases with Reynolds number. The proximity of the cylinder to a wall has considerable influence on the flow as well as heat transfer.