Intermittent Turbulence Characteristics in the Stokes Layer for a Transitional Reynolds Number

KONG Wei; LI Jia

doi:10.21656/1000-0887.400382

Volume 41 Issue 10

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KONG Wei, LI Jia. Intermittent Turbulence Characteristics in the Stokes Layer for a Transitional Reynolds Number[J]. Applied Mathematics and Mechanics, 2020, 41(10): 1171-1182. doi: 10.21656/1000-0887.400382

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Intermittent Turbulence Characteristics in the Stokes Layer for a Transitional Reynolds Number

doi: 10.21656/1000-0887.400382

KONG Wei¹,
LI Jia²

¹Faculty of Architecture and Civil Engineering, Huaiyin Institute of Technology,Huaian, Jiangsu 223001, P.R.China;²Department of Basic Teaching, Tangshan University,Tangshan, Hebei 063000, P.R.China

Funds: The National Natural Science Foundation of China(11702107)

Received Date: 2019-12-27
Rev Recd Date: 2020-09-08
Publish Date: 2020-10-01

Abstract

Abstract

The characteristics of intermittent turbulence induced by wall surface roughness in a finite Stokes layer were investigated numerically, including the velocity gradient at the wall, the velocity profile and the Reynolds stress, etc.， with a transitional Reynolds number Re=495.The results show that, the velocity profile does not follow the logarithmic law in most phases, but does only in some rare phases during the decelerating stage. The comparison between the Reynolds stress and the result in the case of the incompressible boundary layer indicates that, the Reynolds stress distribution in the turbulence stage is similar to that in the case of the incompressible boundary layer, including the peak amplitude and the peak position, but there is significant discrepancy in the turbulence core region between the 2 cases. Above characteristics reveal the strong nonequilibrium behaviors of intermittent turbulence in the Stokes layer.
- Stokes layer,
- transitional Reynolds number,
- intermittent turbulence,
- turbulence characteristic

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References(20)

References

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