Analysis of interfacial forces on the physics of two-phase flow and hyperbolicity of the two-fluid model

interfacial forces;two-phase flow;hyperbolicity;two-fluid model

Talpaert, Arthur ; Kozlowski ; Tomasz

关键词: interfacial forces;    two-phase flow;    hyperbolicity;    two-fluid model;   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/44117/Arthur_Talpaert.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

The scope of this Master Thesis is the two-fluid model. This study aims at analysing their ill-posedness, showinghow it is related to non-hyperbolicity and giving a measurement that I call the numerical hyperbolicity. As a cureto this important issue, we will propose a combination of physical and mathematical solutions. The physical forcesthat we will focus on are two interfacial forces: the interfacial pressure and the virtual mass. We will quantify theminimum correction that is necessary to ensure hyperbolicity of the two-fluid model. We will then compare the twoforces and combine them into an aggregated correction. This correction is proposed for use as a criteria in the nextgeneration of nuclear reactor thermal-hydraulics codes.