[1B01-05] Advanced Simulation

[1B04] A study of appropriate Phase-Field variables for gas-liquid two-phase flow simulations

*Kenta Sugihara¹, Naoyuki Onodera¹, Yasuhiro Idomura¹, Susumu Yamashita¹ (1. JAEA)

Keywords:Gas-liquid two-phase flow simulation, Phase-Field method, Interface tracking

We have been developing a multi-phase multi-component thermal-hydraulic simulation code JUPITER to analyze the migration behavior of molten materials in nuclear reactors under severe accident conditions. In order to improve the interface tracking method of the JUPITER code, the applicability of the phase-field method is studied. In this study, we apply the phase-field method to the JUPITER code and compare it with the theoretical solution of the droplet oscillation phenomenon to investigate the sensitivity of the method against hyper parameters or phase field parameters.