Transient response of enstrophy transport to opposition control in turbulent channel flow

被引：0
|
作者：
葛铭纬 [1 ,2 ]
许春晓 [1 ]
黄伟希 [1 ]
崔桂香 [1 ]
机构：
[1] Key Laboratory of Applied Mechanics, Department of Engineering Mechanics,Tsinghua University
[2] Guodian United Power Technology Company Limited
来源：
Applied Mathematics and Mechanics(English Edition) | 2013年 / 34卷 / 02期
基金：
中国国家自然科学基金;
关键词：
enstrophy transport; opposition control; turbulent channel flow;
D O I：
暂无
中图分类号：
O357.5 [湍流（紊流）];
学科分类号：
080103 ; 080704 ;
摘要：
The transient response of the turbulent enstrophy transport to opposition control in the turbulent channel flow is studied with the aid of direct numerical simulation. It is found that the streamwise enstrophy and the spanwise enstrophy are suppressed by the attenuation of the stretching terms at first, while the vertical enstrophy is reduced by inhibiting the tilt of the mean shear. In the initial period of the control, the streamwise enstrophy evolves much slower than the other two components. The vertical vorticity component exhibits a rapid monotonic decrease and also plays an important role in the attenuation of the other two components.
引用
收藏
页码：127 / 138
页数：12
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