二阶双系数动态亚格子应力模型

被引:3
作者
唐学林
钱忠东
吴玉林
机构
[1] 清华大学热能工程系
[2] 清华大学热能工程系 北京 
[3] 北京 
关键词
亚尺度模型; 动态模型; 湍流; 弯管; 二阶双系数; 亚格子应力;
D O I
10.14042/j.cnki.32.1309.2004.01.010
中图分类号
O357.5 [湍流(紊流)];
学科分类号
摘要
基于亥姆霍兹速度分解定理和Smagorinsky模型,提出二阶双系数动态亚格子尺度应力模型,即亚格子尺度应力是可解的应变率张量和旋转率张量的函数。应用有限差分法对此模型的控制方程进行了离散,并数值模拟得到了弯管内部的流场分布和压力分布。把雷诺数为40000的弯管流动的实验数据和此模型的模拟结果相比较,证明此模型是可行、可靠的。
引用
收藏
页码:50 / 55
页数:6
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