湍流
传热
机械
热传导
热流密度
材料科学
流量(数学)
热力学
大涡模拟
物理
作者
Wei-Zheng Zhang,Xiao Liu,Chang Hu Xiang
出处
期刊:Advanced Materials Research
日期:2011-02-01
卷期号:201-203: 171-175
标识
DOI:10.4028/www.scientific.net/amr.201-203.171
摘要
The turbulent flow in the near-wall region affects the wall heat transfer dominantly. The farther it is from the wall, the less effect it has. So a two-step mechanism of the turbulent wall heat transfer is released: first, the energy is transferred to the outside of the viscous sub-layer by the rolling of the micro-eddy; secondly, the energy gets to the wall by conduction. Then, a theoretical model of wall heat transfer is developed with this concept. The constant in the model is confirmed by experiment and simulation of the transient turbulent heat transfer in pipe flow. Finally, the model is used to predict the local heat flux under different conditions, and the results agree well with the experimental results as well as the simulation results.
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