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Preconditioning Method of Simulating Gas, Liquid and Supercritical-Fluid Flows with Phase Change
Satoru Yamamoto,Takshi Furusawa 한국전산유체공학회 2010 한국전산유체공학회 학술대회논문집 Vol.2010 No.11
A numerical method for simulating gas, liquid, and supercritical-fluid flows across the critical point is presented. The present method is based on the preconditioning method developed by the authors and mathematical models of thermophysical properties develooped by Kyushu University. The thermophysical properties such as density, viscosity, heat conductivity and the derived values are rapidly changed across the critical point. Especially the isobaric specific heat has a maximum peak value. The present method can simulate both low- and high-speed flows with the anomalous properties across the critical point accuartely. As numerical examples, the calculated results of low- and high-speed supercritical carbon-dioxide and water flows across the critical point are introduced.