ABSTRACT

A numerical model based on multi-domain boundary element method (BEM) is developed to study the gravity wave interaction with a horizontally submerged wavy porous plate. The boundary condition on the porous barrier is considered a quadratic pressure drop to incorporate the effect of wave height on the wave energy dissipation directly. The performance characteristics of the wavy porous plate are studied by analysing the hydrodynamic coefficients of the breakwater for different physical parameters. Numerical results demonstrate that wavy porous plate improves the energy dissipation and reduce wave transmission compared against the conventional flat plate. The increase in wave energy dissipation is governed by the ripple amplitude and the number of ripples. The proposed model is expected to act as an effective wave barrier in the attenuation of wave energy for the creation of a tranquillity zone in the marine environment for water depths ranging from intermediate to deep waters.

摘要

建立了基于多域边界元方法（BEM）的数值模型，以研究重力波与水平淹没波浪多孔板的相互作用。多孔屏障上的边界条件被认为是二次压降，以直接考虑波高对波能量耗散的影响。通过分析不同物理参数下防波堤的水动力系数，研究了波浪形多孔板的性能特征。数值结果表明，与常规平板相比，波浪形多孔板可改善能量耗散并减少波的传播。波浪能量耗散的增加取决于波纹幅度和波纹数量。