复式防波堤断面尺度对波浪爬高的影响研究  

RESEARCH ON THE EFFECT OF DOUNLE-SLOPE BREAKWATER SECTION DIMENSIONS ON WAVE RUNUP

作　　者：韩新宇 罗鑫 董胜[1] HAN Xin-yu;LUO Xin;DONG Sheng(College of Engineering, Ocean University of China, Qingdao, Shandong 266100, China)

机构地区：[1]中国海洋大学工程学院

出　　处：《工程力学》2019年第B06期261-267,共7页Engineering Mechanics

基　　金：国家自然科学基金委员会-山东省人民政府联合基金项目(U1706226)

摘　　要：数值模拟是求解防波堤爬高问题的重要方法。以Navier-Stokes方程为控制方程,该文建立了基于紧致插值曲线法(CIP法)的二维不可压缩流体的有限差分数值模型。通过分步算法对时间积分求解控制域,采用双曲正切函数自由面捕捉法(THINC法)对自由液面进行捕捉,采用浸入边界法IBM对固体边界进行处理,将波浪爬高问题视为固-液-气多相流问题。通过建立二维数值水槽,对波浪爬高越浪问题进行数值验证;进而在相同波浪条件下,对不同断面尺寸的复式防波堤进行波浪爬高的数值模拟。结果表明:该模型可以较好地模拟波浪过程中的变形、翻卷、破碎等强非线性现象,得出最大爬高与复式防波堤尺寸之间的关系,从而给出了最小爬高时对应的防波堤断面尺度。Numerical simulation is an important approach to solve breakwater runup problems.This paper builds a two-dimensional Numerical Wave Tank(NWT)which was controlled by the Navier-Stokes equation based on Constrained Interpolation Profile(CIP).The control domain is solved by the fractional step algorithm for time integration.The free surface is captured using the Tangent of Hyperbola for INterface Capturing(THINC)method.The boundary of the breakwater is processed using the immersed boundary method(IBM).The problem of wave runup is considered as a solid-liquid-gas multiphase flow problem.Through the establishment of two-dimensional numerical water tanks,the numerical verification of breakwater runup is performed.Under the same wave conditions,numerical simulations of wave height rising are performed on double-slope breakwaters of different cross-sectional sizes.The results show that the model can simulate the strong non-linear phenomena such as the deformation,rolling and crushing in the wave process.The relationship between the maximum climb height and the size of the double-slope breakwater is obtained,and the corresponding breakwater is given when the minimum climb height is reached.

关 键 词：爬高 CIP法 THINC法 复式防波堤 断面尺度 

分 类 号：O353[理学—流体力学]