Improved numerical wave generation for modelling ocean and coastal engineering problems
Improved numerical wave generation for modelling ocean and coastal engineering problems
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DOI：
10.1016/j.oceaneng.2018.01.052
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发表时间：
2018-03
影响因子：
5
通讯作者：
P. Martínez-Ferrer;L. Qian;Zhihua Ma;D. Causon;C. Mingham
中科院分区：
文献类型：
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作者：
P. Martínez-Ferrer;L. Qian;Zhihua Ma;D. Causon;C. Mingham
我们介绍了一种动态边界数值波浪生成程序，该程序是为海洋和沿海工程问题的典型波浪结构相互作用（WSI）模拟而开发的。该实现依赖于动态网格，该网格会变形以复制造波器的运动，并且它集成在 wsiFoam 中：一种应用于我们之前的工作中开发的两相纳维-斯托克斯求解器的多区域耦合策略 [Martínez Ferrer 等人，2017 年。数值波池中两相流的可压缩和不可压缩流动求解器的多区域耦合方案。计算机与流体 125 (2016) 116–129]。动态边界方法与多区域网格的结合抵消了计算成本的增加，这是动态域模拟所固有的。该方法产生了一种高性能计算波浪生成策略，可用于数值波浪池中，对波浪的生成、传播以及与固定结构和浮体的相互作用进行准确高效的模拟。我们进行了一系列基准测试来验证该波浪生成方法的实现以及求解器 wsiFoam 处理波浪结构相互作用问题的能力。这些基准包括规则波和聚焦波、波与浮体的相互作用以及波能转换器的建模，使用不同的造波器几何形状：活塞、襟翼和柱塞。这项工作中收集的结果与实验室测量的实验数据和其他数值模拟非常吻合。
We introduce a dynamic-boundary numerical wave generation procedure developed for wave structure interaction (WSI) simulations typical of ocean and coastal engineering problems. This implementation relies on a dynamic mesh which deforms in order to replicate the motion of the wave-maker, and it is integrated in wsiFoam: a multi-region coupling strategy applied to two-phase Navier-Stokes solvers developed in our previous work [Martínez Ferrer et al. A multi-region coupling scheme for compressible and incompressible flow solvers for two-phase flow in a numerical wave tank. Computer & Fluids 125 (2016) 116–129]. The combination of the dynamic-boundary method with a multi-region mesh counteracts the increase in computational cost, which is intrinsic to simulations featuring dynamic domains. This approach results in a high performance computing wave generation strategy that can be utilised in a numerical wave tank to carry out accurate and efficient simulations of wave generation, propagation and interaction with fixed structures and floating bodies.We conduct a series of benchmarks to verify the implementation of this wave generation method and the capabilities of the solver wsiFoam to deal with wave structure interaction problems. These benchmarks include regular and focused waves, wave interaction with a floating body and the modelling of a wave energy converter, using different wave-maker geometries: piston, flap and plunger. The results gathered in this work agree well with experimental data measured in the laboratory and other numerical simulations.