Numerical prediction for laminar forced convection heat transfer in parallel-plate channels with streamwise-periodic rod disturbances

作者：Yuan ZX; Tao WQ^*; Wang QW

来源：International Journal for Numerical Methods in Fluids, 1998, 28(9): 1371-1387.

DOI：10.1002/(SICI)1097-0363(19981215)28:9<1371::AID-FLD774>3.0.CO;2-A

• heat transfer
• duct flow
• laminar flow
• boundary conditions

A numerical study has been performed for the periodically fully-developed flow in two-dimensional channels with streamwise-periodic round disturbances on its two walls. To accurately describe the round disturbance boundary condition, a body fitted grid was used. The flow and heat transfer have been studied in the range of Reynolds number, Re = 50-700, and Prandtl number Pr = 0.71. The influences of disturbance parameters and Reynolds number on heat transfer and friction have been investigated in detail. Some of the solutions have been examined using both steady and unsteady finite difference schemes; and the same results have been obtained. The results show that different flow patterns can occur with different deployments of the disturbances. With appropriate configuration of the disturbances, the Nusselt number can reach a value four times greater than in a, smooth channel at the same condition, with the penalty of a much greater pressure drop. On the other hand, if the disturbances are not deployed properly, augmentation of heat transfer cannot be acquired.

• 出版日期1998-12-15
• 单位西安交通大学