Numerical wave tank study of extreme waves and wave-structure interaction using OpenFoam®
Numerical wave tank study of extreme waves and wave-structure interaction using OpenFoam®
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DOI：
10.1016/j.oceaneng.2016.09.017
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发表时间：
2016-11
影响因子：
5
通讯作者：
Zhengjun Hu;D. Greaves;A. Raby
中科院分区：
文献类型：
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作者：
Zhengjun Hu;D. Greaves;A. Raby
在目前的工作中，开源计算流体动力学（CFD）软件包开放领域的操作和操纵（OpenFoam®）被用来模拟波浪结构的相互作用和一个新的波浪边界条件开发的极端波。采用新的波浪边界条件模拟了固定/浮动截断圆柱和简化浮式生产储存和卸载平台（FPSO）的相互作用，并将结果与普利茅斯大学COAST实验室的物理实验数据进行了比较。网格生成（即块和分裂六面体）的不同方法进行了研究，发现是适合这里考虑的情况下，网格和时间收敛也证明。验证工作包括与理论和实验数据的比较。所执行的案例表明，OpenFoam®能够以良好的精度（例如，FPSO上的最大压力值预测在实验的2.4%以内）和效率预测这些波浪-结构相互作用的情况。该代码使用高性能计算并行运行，并且所呈现的模拟表明OpenFoam®是海岸和近海工程应用的合适工具，能够在3D域中模拟两相流并很好地预测波浪-结构物相互作用。
In the present work, the open source Computational Fluid Dynamics (CFD) package-Open Field Operation and Manipulation (OpenFoam®) is used to simulate wave-structure interactions and a new wave boundary condition is developed for extreme waves. The new wave boundary condition is implemented for simulation of interaction with a fixed/floating truncated cylinder and a simplified Floating Production Storage and Offloading platform (FPSO) and results are compared with physical experiment data obtained in the COAST laboratory at Plymouth University. Different approaches to mesh generation (i.e. block and split-hexahedra) are investigated and found to be suitable for cases considered here; grid and time convergence is also demonstrated. The validation work includes comparison with theoretical and experimental data. The cases performed demonstrate that OpenFoam® is capable of predicting these cases of wave-structure interaction with good accuracy (e.g. the value of maximum pressure on the FPSO is predicted within 2.4% of the experiment) and efficiency. The code is run in parallel using high performance computing and the simulations presented have shown that OpenFoam® is a suitable tool for coastal and offshore engineering applications, is able to simulate two-phase flow in 3D domains and to predict wave-structure interaction well.