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Phase Change Equation of State for FSI Applications

To simulate fast transient phenomena, one must consider realistic compressible fluid models that take into consideration phase change, shock wave generation and its propagation. In an industrial framework, such phenomena occur mostly near industrial apparatuses such as pumps, propellers, impellers and control valves. The rapid collapse of cavitation produces strong shock waves that may harm the interacting structure. In this paper, we present the work on Homogeneous Equilibrium Model (HEM) phase change model implemented in the LS-DYNA® that is compatible its legacy ALE and FSI capabilities. Validation against experimental data is shown through previously published test case of cavitation in elastic water pipe.