Transient Response of Enstrophy Transport to Opposition Control in Turbulent Channel Flow

GE Ming-wei; XU Chun-xiao; HUANG Wei-xi; CUI Gui-xiang

doi:10.3879/j.issn.1000-0887.2013.02.004

Volume 34 Issue 2

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GE Ming-wei, XU Chun-xiao, HUANG Wei-xi, CUI Gui-xiang. Transient Response of Enstrophy Transport to Opposition Control in Turbulent Channel Flow[J]. Applied Mathematics and Mechanics, 2013, 34(2): 139-148. doi: 10.3879/j.issn.1000-0887.2013.02.004

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Transient Response of Enstrophy Transport to Opposition Control in Turbulent Channel Flow

doi: 10.3879/j.issn.1000-0887.2013.02.004

¹AML, Department of Engineering Mechanics, Tsinghua University,Beijing 100084, P.R.China;²Guodian United Power Technology Company Limited, Beijing 100039, P.R.China

Received Date: 2012-02-01
Rev Recd Date: 2012-04-21
Publish Date: 2013-02-15

Abstract

Abstract

The transient response of turbulent enstrophy transport to opposition control in turbulent channel flow was studied with the aid of direct numerical simulation. It is found that the streamwise and spanwise enstrophy are suppressed by the attenuation of the stretching terms at first, while the vertical enstrophy is reduced by inhibiting the tilting of mean shear. During 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.
- enstrophy transport,
- opposition control,
- turbulent channel flow,
- direct numerical simulation

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References(13)

References

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