Abstract Porous structures have been widely applied in the coastal and ocean engineering. In the CFD (Computational Fluid Dynamics) simulations of interactions between waves and porous structures, the microscopic model establishment approach usually requires huge amounts of fine grids around the model boundary, thus causing a huge computational overhead. This paper establishes a CFD numerical model using a macroscopic approach to simulate the interaction between waves and a vertical porous plate. By analysing the pressure loss of the interaction above and adding it into the momentum equation as a source term, the macroscopic porosity simulation can be implemented without using huge amounts of fine grids around the perforations. A series of CFD simulations of wave interacting with a vertical porous plate are performed based on the established numerical model, and the corresponding tank tests are conducted. The effects of wave characteristics and porosity of porous plate on horizontal wave force and the reflection and transmission coefficients are analyzed. The results demonstrate that the established model is reliable for engineering analysis and thereby being of great significance for reference purpose in the CFD simulations of waves interacting with porous structures.

中文翻译：

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波与多孔板相互作用的数值模拟与实验分析

摘要 多孔结构在海岸和海洋工程中得到了广泛的应用。在波浪与多孔结构相互作用的CFD（计算流体动力学）模拟中，微观模型建立方法通常需要在模型边界周围设置大量精细网格，从而造成巨大的计算开销。本文采用宏观方法建立CFD数值模型，模拟波浪与垂直多孔板之间的相互作用。通过分析上述相互作用的压力损失并将其作为源项加入到动量方程中，可以实现宏观孔隙度模拟，而无需在射孔周围使用大量精细网格。在建立的数值模型的基础上，对波浪与垂直多孔板相互作用进行了一系列 CFD 模拟，并进行了相应的水槽试验。分析了多孔板的波浪特性和孔隙率对水平波浪力、反射系数和透射系数的影响。结果表明，所建立的模型对于工程分析是可靠的，对波浪与多孔结构相互作用的CFD模拟具有重要的参考意义。