摘要
从流体力学基本方程和气液混合耦合计算方程出发,采用有限差分方法,对随机布置块石形成的断面进行精细化网格划分。运用计算流体力学软件,建立了抛石防波堤波浪作用仿真模型,并严格按照实际情况设定边界条件,精确完成气液混合相的耦合计算。对抛石防波堤压强和流速分布及块石受力的仿真计算表明,水深会影响抛石堤水流入射区域、压强和流线分布;堤前后侧压强差的改变是堤内发生渗流的必要条件,而局部较大的孔隙率和孔隙连接程度,会导致该区域渗流程度加大;处于流线位置上的块石因受到快速水流的冲击作用,会产生较大的水平作用力。
Based on the fluid equations, the section accumulated by mechanics basic equations and gas-liquid mixing coupling calculation rocks generated randomly was meshed in refinement using finite difference method. Based on CFD software, the simulation model on wave action of mound breakwater was established and the boundary condition was set in accordance with the actual situation strictly to gain an accurate gas-liquid mixing coupling calculation. Simulation results of pressure and flow lines distribution in and around the mound breakwater and strength of rocks indicate that the water depth has an effect on inlet area, pressure and flow lines distribution; the pressure difference of front and back side of the breakwater is necessary for transfusion inside of breakwater; lager local porosity and gap connection degree result in lager transfusion degree and strength of the rocks blocking in flow lines is lager as the conflict between water and rocks.
出处
《水运工程》
北大核心
2015年第10期34-38,共5页
Port & Waterway Engineering
关键词
海岸工程
抛石防波堤
波浪作用
有限差分法
CFD仿真
coastal engineering
rubble mound breakwater
wave action
finite difference method
CFD simulation
