VOF与Level Set耦合的界面计算方法及其对波浪破碎过程的模拟  

Coupled VOF and Level Set method for interface calculation and its application to wave breaking simulation

作　　者：贾伟[1] 柳淑学[1] 李金宣[1] 范玉平 JIA Wei;LIU Shu-xue;LI Jin-xuan;FAN Yu-ping(State Key Laboratory of Coastal and Offshore Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,大连116024

出　　处：《水道港口》2020年第2期125-132,203,共9页Journal of Waterway and Harbor

基　　金：国家自然科学基金项目(51879037,51739010,51490672)。

摘　　要：破碎波浪传播过程的数值模拟是研究波浪破碎特性的重要手段。文章提出了一种用于计算界面的VOF和Level Set耦合算法,从而利用VOF方法质量守恒、Level Set方法能够更准确计算法向量的优点。体积分数采用一种较新的VOF几何方法——isoAdvector方法计算,并在此基础上建立了基于等值面的界面重构算法,Level Set函数通过几何迭代方法进行计算并用于计算法向量。通过溃坝问题的求解,验证了该方法的有效性,并将其应用于波浪在地形上传播破碎问题的求解,与实验结果进行对比,说明该方法可以很好地模拟复杂地形上的波浪传播破碎问题。Numerical modeling is an important approach for the study of wave propagation and breaking.In this paper,a coupled volume-of-fluid and Level Set method was proposed for interface calculation.Both the advantages of mass conservation by VOF method and the accurate calculation of normal vector by Level Set method are maintained in this method.A geometrical VOF method-isoAdvector method was adopted in this paper for the advection of volume fraction field,with a surface reconstruction algorithm added by calculating the contour surfaces.Level Set function was calculated by an iterative geometrical method,which is similar to the VOSET method.The dam break problem was used to verify the validity of the numerical method.Then the method was applied to simulate the process of wave propagation and wave breaking on topography.The results were compared with the experimental results to verify that it can be effectively simulate the wave breaking process on a complex topography.

关 键 词：isoAdvector方法 VOSET方法 耦合算法 界面计算 波浪破碎 

分 类 号：U65[交通运输工程—港口、海岸及近海工程] TV139.2[交通运输工程—船舶与海洋工程]