CFD Investigations of Interaction Between Freak Wave and
Bottom-Mounted Vertical Cylinder

doi:10.1007/s12204-022-2527-1

J Shanghai Jiaotong Univ Sci ›› 2024, Vol. 29 ›› Issue (5): 809-816.doi: 10.1007/s12204-022-2527-1

• Naval Architecture, Ocean and Civil Engineering • Previous Articles Next Articles

CFD Investigations of Interaction Between Freak Wave and Bottom-Mounted Vertical Cylinder

畸形波与底部固定垂直圆柱相互作用的CFD研究

GAO Ningbo^1* (高宁波),ZHANG Yongtao^2,3 (张永涛), ZHANG Hong⁴ (张鸿)

(1. CCCC Second Harbor Engineering Co., Ltd., Wuhan 430040, China; 2. Key Laboratory of Large-Span Bridge Construction Technology, Wuhan 430040, China; 3. Research and Development Center of Transport Industry of Intelligent Manufacturing Technologies of Transport Infrastructure, Wuhan 430040, China; 4. CCCC Highway Bridges National Engineering Research Centre Co., Ltd., Beijing 100088, China)
（1. 中交第二航务工程局有限公司，武汉 430040；2. 长大桥梁建设施工技术交通行业重点实验室，武汉 430040；3. 交通基础设施智能制造技术交通运输行业研发中心，武汉 430040；4. 中交公路长大桥建设国家工程研究中心有限公司，北京 100088）

Accepted:2022-06-08 Online:2024-09-28 Published:2024-09-28

Abstract

Abstract: We studied the interactions between freak wave and bottom-mounted vertical cylinder. The freak wave is generated through linear superposition method which satisfies the definition that the wave height is at least two times the significant wave height. A numerical wave tank is developed based on FLUENT software in which the finite volume method is used for the spatial discretization. Grid sensitivity is conducted in 2D model, and then the freak wave is simulated in 3D model. The freak wave loads on the vertical cylinder are calculated and compared with the results obtained through Morison equation. The numerical results present larger peak and shallower trough compared with the prediction of Morison equation. Meanwhile, the free surface wave elevation within a radius distance around the vertical cylinder is investigated. The lowest wave run-up around vertical cylinder caused by freak wave is about 55% of the highest wave run-up, and the direction is about 45˚of the wave propagation.

Key words: Navier-Stokes equations, freak wave, wave run-up, wave force

摘要： 研究了异形波与底部垂直圆柱的相互作用。通过线性叠加法产生异常波，满足波高至少为有效波高两倍的定义。基于FLUENT软件，采用有限体积法对波浪槽进行空间离散，开发了数值波浪槽。首先在二维模型中进行网格敏感，然后在三维模型中模拟异常波。计算了垂直圆柱上的异形波荷载，并与Morison方程的计算结果进行了比较。数值结果与Morison方程的预测结果相比，峰大谷浅。同时，研究了垂直圆柱周围半径范围内的自由面波高程。垂直圆柱附近异常波引起的最低波高约为最高波高的55%，波传播方向约为45˚。

关键词: Navier-Stokes方程，畸形波，波浪上升，波浪力

CLC Number:

O 353

GAO Ningbo¹ (高宁波), ZHANG Yongtao^{2, 3} (张永涛), ZHANG Hong⁴ (张鸿). CFD Investigations of Interaction Between Freak Wave and Bottom-Mounted Vertical Cylinder[J]. J Shanghai Jiaotong Univ Sci, 2024, 29(5): 809-816.

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CFD Investigations of Interaction Between Freak Wave and Bottom-Mounted Vertical Cylinder

畸形波与底部固定垂直圆柱相互作用的CFD研究

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