Numerical simulation of wave interaction with vertical circular cylinders of different submergences using immersed boundary method
Numerical simulation of wave interaction with vertical circular cylinders of different submergences using immersed boundary method
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DOI：
10.1016/j.compfluid.2014.09.043
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发表时间：
2015-01
影响因子：
2.8
通讯作者：
Azhen Kang;P. Lin;Yishi Lee;B. Zhu
中科院分区：
文献类型：
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作者：
Azhen Kang;P. Lin;Yishi Lee;B. Zhu
本文建立了一个三维波浪-结构物相互作用的数值模型。该模型是早期多层σ坐标模型（Lin，2006）的扩展，包括直接强迫浸入边界方法来处理弯曲的物体表面。首先进行了自由面计算的模型验证。一种情况是规则波对垂直大圆柱的绕射。计算结果与解析解吻合较好。另一种是非线性波浪与固定浮体的相互作用。自由液面的数值计算结果与实验结果及文献中的数值计算结果吻合较好。接下来进行力和力矩的模型验证。对于孤立波与垂直圆柱的相互作用，数值计算结果与实验结果进行了比较，得到了很好的一致性波的高度和净波浪力的作用在圆柱上。对于有限水深中的固定圆柱体，波浪绕其绕射时，作用在圆柱体上的水平力、垂直力和弯矩与高阶边界元法的解析解和数值结果吻合较好。
A three-dimensional numerical model has been developed to simulate wave-structure interaction over an uneven bottom. This model is an extension of the earlier multiple-layerσ-coordinate model (Lin, 2006) by including the direct-forcing immersed boundary method to deal with curved body surfaces. The model verification for free surface computation is firstly conducted. One case is regular wave diffraction over a large vertical circular cylinder. The computational results show good agreement with the analytical solution. The other is nonlinear wave interaction with a fixed floating vertical circular cylinder. The numerical results of free surface agree well with the experimental results and other numerical data found in literatures. The model verification of force and moment is done next. For solitary wave interaction with a vertical circular cylinder, the numerical results are compared with the experimental data and good agreements have been obtained for wave elevation and net wave force acting on the cylinder. For wave diffraction around a fixed submerged vertical cylinder in a finite water depth, the horizontal forces, vertical forces and moments on the structure agree well with the analytical solution and numerical results of a higher order boundary element method.