U型防波堤与波浪相互作用的数值模拟

半淹没式固定U型防波堤,通过在自由水面附近设置挡浪结构增加能量耗散而达到降低港内波浪的目的;为了减小U型防波堤波浪反射,在其左侧设置成可渗透型沉箱。本文基于Navier-Stokes方程,采用k-ε模型封闭雷诺方程,以spatially-averaged方程作为孔隙流的控制方程,用VOF方法跟踪自由表面,建立了波浪与建筑物相互作用的数学模型,采用该模型模拟了规则波入射时波浪与可渗透型U型防波堤的相互作用,针对不同尺寸U型防波堤,进一步讨论了U型防波堤对波浪传播中反射和透射的影响。

Numerical Simulation of U-type Breakwaters Interaction with Wave

The U-type breakwater is similar to traditional transmission breakwaters.Considering the energy flux is maximal near the free surface,so the breakwater located near the free surface can effectively reduce the wave height.The most efficient one is a semi-immersed caisson made up of a horizontal plate and two emerging wall at the ends,that is U-type breakwater.An absorbing caisson at the left side of the structure is used in order to reduce the reflection.The numerical model calculates the wave field outside the porous breakwater based on the Reynolds Navier-Stokes equation and model.The flow in the porous breakwater is described by the spatially-averaged equation.The VOF method is adopted to deal with the free surface.The numerical model is built to simulate the breakwaters interation with wave.Comparing and analyzing the reflection and transition in different structure.