Numerical Analysis of Local Scour and Protection of a Single Pile Around a Seabed Under Solitary Wave and Current

A numerical simulation is conducted to investigate the local scour of the seabed around the pile under the actions of both solitary waves and currents. By solving the N-S equations enclosed by the RNG k-ε turbulence model, the change of the flow field around the pile is simulated accurately. The sed...

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Published inShànghăi jiāotōng dàxué xuébào Vol. 55; no. 6; pp. 631 - 637
Main Author LI Weijie, ZHANG Qi, LIAO Chencong, ZHOU Xianglian, LIU Chenchen
Format Journal Article
LanguageChinese
Published Editorial Office of Journal of Shanghai Jiao Tong University 01.06.2021
Subjects
current
monopile
scour
scour protection
solitary wave
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Summary:A numerical simulation is conducted to investigate the local scour of the seabed around the pile under the actions of both solitary waves and currents. By solving the N-S equations enclosed by the RNG k-ε turbulence model, the change of the flow field around the pile is simulated accurately. The sediment transport model considers all the sediment transport processes including entrainment, suspended load transport, deposition, and bed-load transport. For the slope seabed, the influence of gravity on the sediment particles is considered, and the shields parameter is modified. The accuracy of the model is verified by comparing the numerical results with the experimental data. Besides, the process of scour development at different wave heights is investigated in detail. The effect of pile foundation protection layer on scour is preliminarily studied. The results show that the combined solitary wave-current conditions have a significant effect on the scour depth around the pile than the current-only or wave-only.
ISSN:1006-2467
DOI:10.16183/j.cnki.jsjtu.2020.108