{"title":"A MULTIPHASE, RIEMANN-SOLVER APPROACH TO GAS-CAVITATION","authors":"Andris Rambaks, H. Murrenhoff, K. Schmitz","doi":"10.1615/tfec2020.mph.031923","DOIUrl":null,"url":null,"abstract":"In hydraulic systems, a certain amount of air is always present as entrained air in the form of gaseous bubbles and as dissolved air. Large amounts of entrained air negatively affect the behavior of hydraulic systems by decreasing the bulk modulus of the fluid and increasing the risk of cavitation damage, e.g., cavitation erosion and the microdiesel effect. The diffusion-driven growth of entrained gaseous bubbles surrounded by a liquid phase is referred to as gas-cavitation, in which dissolved air from the solution diffuses into the bubble. In the proposed paper, the diffusion-driven growth of a single gas bubble immersed in a liquid is examined. To that end, a comprehensive literature review, a mathematical description of the problem as well as the numerical implementation is presented.","PeriodicalId":434777,"journal":{"name":"Proceeding of 5th Thermal and Fluids Engineering Conference (TFEC)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceeding of 5th Thermal and Fluids Engineering Conference (TFEC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1615/tfec2020.mph.031923","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In hydraulic systems, a certain amount of air is always present as entrained air in the form of gaseous bubbles and as dissolved air. Large amounts of entrained air negatively affect the behavior of hydraulic systems by decreasing the bulk modulus of the fluid and increasing the risk of cavitation damage, e.g., cavitation erosion and the microdiesel effect. The diffusion-driven growth of entrained gaseous bubbles surrounded by a liquid phase is referred to as gas-cavitation, in which dissolved air from the solution diffuses into the bubble. In the proposed paper, the diffusion-driven growth of a single gas bubble immersed in a liquid is examined. To that end, a comprehensive literature review, a mathematical description of the problem as well as the numerical implementation is presented.