湍流相干结构的机理研究(Ⅱ)─粗糙壁边界层相干结构的物理模型<sup>*</sup>

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湍流相干结构的机理研究(Ⅱ)─粗糙壁边界层相干结构的物理模型^*

基金项目: *国家自然科学基金资助

Shanghai Int. of Appl. Math. and Mech., Shanghai University, Shanghai 200072, P. R. China

摘要: 本文主要分析了粗糙壁面相干结构的特性以及与光滑壁面相干结构的区别,讨论了从光滑壁到粗糙壁过渡的问题,在此基础上建立了粗糙壁面相干结构的物理模型,从理论上得到了慢条宽度、猝发时间等物理量与动量厚度雷诺数的关系,其结果与实验结果是相符合的.
- 湍流理论 /
- 相干结构 /
- 粗糙壁面 /
- 物理模型
Abstract: In this paper,the differences of turbulent coherent structure beween the smooth and rough boundary lavers are analysed.Based on the discussing the transient properties from the smooth wall tothe rough wall,the physicalmodel of coherent structure for the rough boundary layer are established.The width of slwly-moving turbulent spot and the bursting time are obtained,which are in agreement with experimental results.
- turbulent theory /
- coherent structure /
- rough boundary layer /

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[4]	P.G.Saffman.the lift on a small sphere in a shear flow.J.Fluid.Mech,22.(1965).385-400.
[5]	蔡树棠、刘宇陆,湍流相干结构的机理研究(Ⅰ)——光滑壁面边界层相干结构的物理模型,应用数学和力学,16(4)(1995).

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