Numerical study on influence of vegetation on bed shear stress under coastal waves

Ge Zhaopei; Tang Jun; Zhao Chuyan

doi:10.12284/hyxb2022125

Volume 44 Issue 11

Nov. 2022

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Ge Zhaopei，Tang Jun，Zhao Chuyan. Numerical study on influence of vegetation on bed shear stress under coastal waves[J]. Haiyang Xuebao，2022, 44(11)：111–120 doi: 10.12284/hyxb2022125

Citation:

Ge Zhaopei，Tang Jun，Zhao Chuyan. Numerical study on influence of vegetation on bed shear stress under coastal waves[J]. Haiyang Xuebao，2022, 44(11)：111–120 doi: 10.12284/hyxb2022125

Citation:

Ge Zhaopei，Tang Jun，Zhao Chuyan. Numerical study on influence of vegetation on bed shear stress under coastal waves[J]. Haiyang Xuebao，2022, 44(11)：111–120 doi: 10.12284/hyxb2022125

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Numerical study on influence of vegetation on bed shear stress under coastal waves

doi: 10.12284/hyxb2022125

Ge Zhaopei^1
,,
Tang Jun^{1
,
,},
Zhao Chuyan¹

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116023, China

Received Date: 2022-03-11
Rev Recd Date: 2022-05-20

Available Online: 2022-10-08

Publish Date: 2022-11-03

Abstract

Abstract

To analyze the effects of wave height, vegetation density, submerged height of vegetation and current on the bed shear stress at vegetation zones, a three-dimensional wave-current numerical flume is established based on OpenFOAM in this study. The results show that the bed shear stress attenuates along the vegetation zones because of the blocking effect of vegetation, and the decay rate is positively correlated with the wave height, vegetation density and submerged height of vegetation. Compared with pure wave, the amplitude of positive bed shear stress increases and the amplitude of negative bed shear stress decreases under the condition of combined wave-current flows. The weak current has no obvious effect on the size and distribution of the bed shear stress at vegetation zones. In the case of strong current, the bed shear stress increases at vegetation zones and suddenly decreases after the vegetation zones.
- coastal vegetation,
- wave,
- bed shear stress,
- OpenFOAM

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References(32)

References

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