Numerical prediction for laminar forced convection heat transfer in parallel-plate channels with streamwise-periodic rod disturbances
Numerical prediction for laminar forced convection heat transfer in parallel-plate channels with streamwise-periodic rod disturbances
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DOI：
10.1002/(sici)1097-0363(19981215)28:9
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发表时间：
1998-12
影响因子：
1.8
通讯作者：
Zhongxian Yuan;W. Tao;Qiuwan Wang
中科院分区：
文献类型：
--
作者：
Zhongxian Yuan;W. Tao;Qiuwan Wang
摘要 对两壁上具有流向周期性圆形扰动的二维通道中周期性充分发展的流动进行了数值研究。为了准确描述圆形扰动边界条件，使用了体拟合网格。研究了雷诺数 Re50-700 和普朗特数 Pr 0.71 范围内的流动和传热。详细研究了扰动参数和雷诺数对传热和摩擦的影响。一些解已经使用稳态和非稳态有限差分格式进行了检验；并得到了相同的结果。结果表明，不同的扰动部署可能会出现不同的流动模式。通过适当配置扰动，努塞尔数可以达到相同条件下平滑通道的四倍，但代价是压降更大。另一方面，如果扰动部署不当，则无法实现传热的增强。 © 1998 约翰威利父子公司。
SUMMARY 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, Re50‐700, 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. © 1998 John Wiley & Sons, Ltd.