Hydrodynamics and Heat Transfer of Turbulent Flow around a Rhombus Cylinder

Abstract

Three dimensional turbulent channel flow and heat transfer in the presence of a rhombus cylinder were studied numerically. The Reynolds number ranges from 100–20,000. Air has been used as a working fluid. In this paper, transition - SST model has been applied for numerical simulations. The Computation was made for four channel blockage ratios at different Reynolds. The wall boundary layer of the channel starts detached when a rhombus cylinder is placed in the channel, and a later swirling zone appears behind the cylinder. The results indicate that in presence of rhombus cylinder, heat transfer in the channel is augmented significantly. Nusselt number and friction loss increased with increase of blockage ratio. Numerical results indicate that the use of rhombus cylinder, the channel can increase the heat transfer performance.