Application of thermal shear stress gauge in study on wave-current dynamics

Xu Hua; Xia Yunfeng; Cai Zhewei; Hao Siyu; Zhang Shizhao

doi:10.11729/syltlx20170034

Volume 31 Issue 3

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Article Navigation > Journal of Experiments in Fluid Mechanics > 2017 > 31(3): 78-81, 93

Xu Hua, Xia Yunfeng, Cai Zhewei, et al. Application of thermal shear stress gauge in study on wave-current dynamics[J]. Journal of Experiments in Fluid Mechanics, 2017, 31(3): 78-81, 93. doi: 10.11729/syltlx20170034

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Application of thermal shear stress gauge in study on wave-current dynamics

doi: 10.11729/syltlx20170034

Xu Hua^{1, 3, 4
,
,},
Xia Yunfeng^{1, 3, 4},
Cai Zhewei^{1, 3, 4},
Hao Siyu^{1, 2, 3, 4},
Zhang Shizhao^{1, 3, 4}

1.
Nanjing Hydraulic Research Institute, Nanjing 210029, China
2.
College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
3.
The State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Nanjing 210098, China
4.
Key Laboratory of Port, Waterway and Sedimentation Engineering of Ministry of Transport, Nanjing 210024, China

Received Date: 2017-03-02
Rev Recd Date: 2017-05-22
Publish Date: 2017-06-25

Abstract

Abstract

The movement of sediment at estuary and coast is directly restricted by the bed shear stress. Therefore, the basic research on the influence of the bed shear stress on the sediment movement is important. However, there is no available method for measuring and computing the bed shear stress under a complicated dynamic condition like the wave current. This paper conducts the measurement and test research on the bed shear stress in a long launder of direct current by the new thermal shearometer based on micro-nanotechnology. As the research results show, the thermal shearometer has high response frequency and strong stability. The measuring result reflects the basic law of the bed shear stress with the wave and wave-current effect, and confirms that the method of measuring bed shear stress under wave-current condition with the thermal shearometer is feasible. Meanwhile, a preliminary method to compute the shear stress compounded by wave-current is put forward. It benefits further research on the basic theory of the sediment movement with complicated dynamic effects.
- thermal shearometer,
- bed shear stress,
- wave-current effect,
- sediment movement

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References(13)

References

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