两相流数值模拟的单层粒子Level Set方法  

One-layer Particle Level Set Method for Numerical Simulation of Two-phase Flow

作　　者：周涛[1] 徐心怡 牟凯龙 毛佳[1] 赵兰浩[1] Zhou Tao;Xu Xinyi;Mu Kailong;Mao Jia;Zhao Lanhao(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China;College of Houston International Institute,Dalian Maritime University,Dalian 116026,China)

机构地区：[1]河海大学水利水电学院,南京210098 [2]大连海事大学休斯顿国际学院,大连116026

出　　处：《水动力学研究与进展（A辑）》2024年第4期578-586,共9页Chinese Journal of Hydrodynamics

基　　金：国家重点研发计划项目(2022YFC3005402);国家自然科学基金资助项目(52009034);水利部重大科技项目(SKS-2022108);河海大学水安全与水科学协同创新中心。

摘　　要：在粒子Level Set方法的基础上,该文提出了一种两相流数值模拟的单层粒子Level Set方法。与一般粒子Level Set方法不同,该方法只需要在界面处布置一层拉格朗日粒子,并依据粒子位置信息修正重新初始化带来的界面失真,从而实现对界面位置的准确追踪,并表现出良好的质量守恒性。模拟两相流时,针对两相流界面发生剧烈拓扑变化时的粒子聚集与空缺,给出了简单易实现的粒子重分配策略,并通过若干经典算例的计算,验证了单层粒子LevelSet方法模拟两相流问题的准确性和有效性。Based on the particle Level Set method,in this paper,a one-layer particle Level Set method is present for numerical simulation of two-phase flow.Different from the general particle Level Set method,the proposed method only needs to lay a layer of Lagrangian particles at the interface,and the distortion caused by reinitialization is corrected according to the position information of the particles,so as to achieve accurate tracking of the interface position and show good mass conservation.In the simulation of two-phase flow,aiming at the aggregation and vacancy of particles when the interface of two-phase flow is undergoing drastic topological changes,a simple and easy to implement particle redistribution strategy is given.The accuracy and effectiveness of the one-layer particle Level Set method for simulating two-phase flow are verified by several classical examples.

关 键 词：两相流 界面 Level set 拉格朗日粒子 

分 类 号：O359[理学—流体力学]