{"title":"用于薄界面结构数值模拟的局部再分布水平集方法","authors":"Jaehee Chang, Kiyoung Kim, Haecheon Choi","doi":"10.1016/j.compfluid.2024.106315","DOIUrl":null,"url":null,"abstract":"<div><p>The level-set method performs well when it captures relatively thick interface structures, but may not properly resolve thin interface structures when their sizes are comparable to or smaller than grid sizes. With coarse grids, these thin interface structures are lost through non-physical breakup during simulation. We propose a locally redistributed level-set method to sustain thin structures with reasonable grid resolution. The present method distributes additional level-set functions at the regions where two interfaces of a structure are about to contact. This method captures thin interface structures smaller than grid sizes. Moreover, it identifies adjacent interfaces separately, and enables an accurate calculation of surface tension. Numerical simulations are performed for binary droplet collisions at relatively high Weber numbers, and show that thin interface structures are well captured and their interface dynamics is accurately predicted.</p></div>","PeriodicalId":287,"journal":{"name":"Computers & Fluids","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A locally redistributed level-set method for numerical simulation of thin interface structures\",\"authors\":\"Jaehee Chang, Kiyoung Kim, Haecheon Choi\",\"doi\":\"10.1016/j.compfluid.2024.106315\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The level-set method performs well when it captures relatively thick interface structures, but may not properly resolve thin interface structures when their sizes are comparable to or smaller than grid sizes. With coarse grids, these thin interface structures are lost through non-physical breakup during simulation. We propose a locally redistributed level-set method to sustain thin structures with reasonable grid resolution. The present method distributes additional level-set functions at the regions where two interfaces of a structure are about to contact. This method captures thin interface structures smaller than grid sizes. Moreover, it identifies adjacent interfaces separately, and enables an accurate calculation of surface tension. Numerical simulations are performed for binary droplet collisions at relatively high Weber numbers, and show that thin interface structures are well captured and their interface dynamics is accurately predicted.</p></div>\",\"PeriodicalId\":287,\"journal\":{\"name\":\"Computers & Fluids\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-05-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Computers & Fluids\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0045793024001476\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computers & Fluids","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0045793024001476","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
A locally redistributed level-set method for numerical simulation of thin interface structures
The level-set method performs well when it captures relatively thick interface structures, but may not properly resolve thin interface structures when their sizes are comparable to or smaller than grid sizes. With coarse grids, these thin interface structures are lost through non-physical breakup during simulation. We propose a locally redistributed level-set method to sustain thin structures with reasonable grid resolution. The present method distributes additional level-set functions at the regions where two interfaces of a structure are about to contact. This method captures thin interface structures smaller than grid sizes. Moreover, it identifies adjacent interfaces separately, and enables an accurate calculation of surface tension. Numerical simulations are performed for binary droplet collisions at relatively high Weber numbers, and show that thin interface structures are well captured and their interface dynamics is accurately predicted.
期刊介绍:
Computers & Fluids is multidisciplinary. The term ''fluid'' is interpreted in the broadest sense. Hydro- and aerodynamics, high-speed and physical gas dynamics, turbulence and flow stability, multiphase flow, rheology, tribology and fluid-structure interaction are all of interest, provided that computer technique plays a significant role in the associated studies or design methodology.