Drift of weakly inertial plastic blocks under wave action of finite-water-depth

Feng Xi; Liu Qiyan; Xu Qingyun; Ni Xingye; Feng Weibing

doi:10.12284/hyxb2024009

Volume 46 Issue 4

Jun. 2024

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Feng Xi，Liu Qiyan，Xu Qingyun, et al. Drift of weakly inertial plastic blocks under wave action of finite-water-depth[J]. Haiyang Xuebao，2024, 46(4)：1–12 doi: 10.12284/hyxb2024009

Citation:

Feng Xi，Liu Qiyan，Xu Qingyun, et al. Drift of weakly inertial plastic blocks under wave action of finite-water-depth[J]. Haiyang Xuebao，2024, 46(4)：1–12 doi: 10.12284/hyxb2024009

Citation:

Feng Xi，Liu Qiyan，Xu Qingyun, et al. Drift of weakly inertial plastic blocks under wave action of finite-water-depth[J]. Haiyang Xuebao，2024, 46(4)：1–12 doi: 10.12284/hyxb2024009

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Drift of weakly inertial plastic blocks under wave action of finite-water-depth

doi: 10.12284/hyxb2024009

Feng Xi^{1, 3, 4
,},
Liu Qiyan¹,
Xu Qingyun²,
Ni Xingye¹,
Feng Weibing¹

1.
College of Harbour, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China
2.
China Harbour Engineering Company Ltd., Beijing 100027, China
3.
Hainan Geological Bureau Hainan Marine Geological Survey, Haikou 570206, China
4.
State Key Laboratory of Hydraulic Engineering Intelligent Construction and Operation, Tianjin University, Tianjin 300354, China

Received Date: 2023-09-02
Rev Recd Date: 2024-01-30

Available Online: 2024-05-16

Publish Date: 2024-06-30

Abstract

Abstract

Plastic floating objects have a profound impact on the marine environment. The nearshore process of the floating objects is mainly influenced by the action of waves. On the kinetic characteristics of plastic floating objects, previous studies were not thorough for the nearshore regime. In this paper, laboratory experiments were used to study the drift-law of plastic-floating objects under finite-water-depth waves. The relationship between the horizontal drift velocity of a weakly inertial plastic blocks and their characteristics, along with the wave steepness were discussed. The experimental results show that the drift of plastic blocks is affected by Stokes drift and Euler return flow, which is in good agreement with the second-order Lagrange drift theory. As the floating object’s size is much smaller than the wave length, size or density of the floating objects has no significant effect on drift. The drift of floating objects is proportional to the square of wave steepness. Based on the experiments conducted in this study and previously published experimental data, the empirical formula is revised to provide useful reference for the nearshore migration law of plastic floating objects and so for the relevant prediction.
- plastic floating objects,
- finite-water-depth wave,
- second-order Stokes wave,
- Lagrange drift

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References(29)

References

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