波浪在抛石潜堤上传播变形的MPS法模拟研究  

Simulation study on wave propagation over submerged permeable breakwater by MPS method

作　　者：张永兰 蒋勤[1] IDDY Iddy 孙典红[1] ZHANG Yong-lan;JIANG Qin;IDDY Iddy;SUN Dian-hong(College of Harbor,Coastal and Offshore Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学港口海岸与近海工程学院,江苏南京210098

出　　处：《水运工程》2021年第1期27-36,共10页Port & Waterway Engineering

基　　金：国家重点研发计划项目(2017YFC0405400)。

摘　　要：波浪在抛石潜堤上传播过程中会出现波浪反射、透射、越浪和破碎等复杂的流体运动过程,是一个复杂的强非线性紊流渗流问题。采用改进的MPS法,基于Drew的多孔介质内二相流运动控制方程,推导出适合粒子法的渗流水体压力泊松方程的混合源项方程,并通过在模型中引入SPS紊流模型来模拟多孔介质内外的紊流效应,构建垂向二维MPS法紊流渗流数值计算模型,模拟波浪在抛石潜堤上传播变形问题,对抛石潜堤内外的流速场、压力场、紊流能量的分布特性进行分析。结果表明:模型能够很好地再现抛石潜堤内外复杂的流场和压力分布,而且显著缓解流-固界面处的压力振荡与粒子分布不均匀问题,实现较高的模拟精度。Wave interaction with submerged permeable breakwater involves wave reflection,wave transformation,wave overtopping and wave breaking,which is a complex nonlinear problem of turbulent flow and seepage flow.Based on the improved MPS method,we apply Drew's governing equations of two phase flow in porous media,derive source term equation of Poisson pressure equation of seepage water pressure suitable for particle method,introduce SPS turbulence model into the model to simulate the turbulent effect inside and outside porous media,establish a vertical two-dimensional MPS method numerical calculation model of turbulent seepage flow,simulate wave propagation and deformation over the submerged permeable breakwater,and analyze the distribution characteristics of velocity and pressure fields and well wave energy dissipation around the submerged permeable breakwater.The results show that the model can reproduce the complex flow field and pressure distribution around the submerged permeable breakwater,alleviate the problem of pressure oscillation and particle distribution at the fluid-solid interface,and achieve high simulation accuracy.

关 键 词：MPS法 SPS紊流模型 渗流 抛石潜堤 数值模型 

分 类 号：U652[交通运输工程—港口、海岸及近海工程] U656.2[交通运输工程—船舶与海洋工程]