Numerical study of erosion and deposition of sandy beach in presence of breakwater with spill hole
Numerical study of erosion and deposition of sandy beach in presence of breakwater with spill hole
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带溢流孔防波堤的沙滩侵蚀沉积数值研究
DOI：
10.1016/j.oceaneng.2022.113292
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发表时间：
2023-02
影响因子：
5
通讯作者：
Changbo Jiang
中科院分区：
文献类型：
--
作者：
Bin Deng;Yanwu Xie;Hansong Tang;He Tao;Changbo Jiang
本文通过数值模拟研究了设置溢流孔的防波堤对桑迪海滩冲淤的影响，旨在了解防波堤的减冲效果。采用VOF方法和其他技术求解了水砂混合物的二维控制方程。数值方法验证了对实验数据的波传播的不渗透的海滩与防波堤，冲刷下的管道，冲刷前的防波堤，和侵蚀和沉积的砂桑迪海滩。在此基础上，分别对桑迪、海滩上设置防波堤和桑迪上设置溢流孔防波堤三种情况进行了数值模拟。然后，研究进行了详细的调查，第三种情况下，不同的防波堤位置，溢流孔的大小，水深和波高。结果表明，防波堤的存在确实减少了海滩的冲刷，且防波堤位置和波高对冲刷有显著影响。防波堤在减小海滩侵蚀方面的性能在特定的孔开口尺寸下达到最大。本研究所揭示之认识，可望对防波堤之设计与应用有所助益。
This paper presents a numerical study on erosion and deposition of a sandy beach installed with a breakwater bearing spill holes, aiming to understand its performance in erosion reduction. The two-dimensional (2D) governing equations for the water-sand mixture are solved by the VOF method and other techniques. The numerical approaches are validated against experimental data for wave propagation on an impermeable beach with a breakwater, scour underneath a pipeline, scour in front of a breakwater, and erosion and deposition of a sandy beach. On these bases, numerical simulations are made for three scenarios: a sandy beach, a sandy beach with a breakwater, and a sandy beach with a breakwater with spill holes. Then, the study proceeds to a detailed investigation of the third scenario with different breakwater locations, spill hole sizes, water depths, and wave heights. The results indicate that the breakwater indeed reduces beach erosion, and the breakwater location and wave height have a pronounced influence on the erosion. The breakwater's performance in reducing beach erosion achieves a maximum at a specific size of the hole opening. It is anticipated that the understanding revealed in this study sheds light on the design and application of breakwaters.
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