Moving Particle Semi-implicit (MPS) Utilization in Analyzing the Stratification Behavior of Immiscible Liquid

Abstract

The reactor core accident, especially the reactor core melt-down, is one of the most important things to be considered in analyzing the reactor safety factor. In melted reactor core case, one of the interesting phenomena which can be examined is the process of stratification of a metallic liquid component of the melted reactor core. In this study, it is observed the stratification process of immiscible liquid through simulation and validation with experiment. One method that can be utilized to model the liquid stratification is the MPS (Moving Particle Semi-Implicit) method. The stratification experiments were conducted using water and several kinds of oils. From the gained results, it can be seen that the obtained results of the simulation are in good agreement with the experiment results. In addition, from the simulation and experimental results, it can be seen that the density of liquid significantly affects the stratification process. The kinematic viscosity of liquid also affects the rate of liquid penetration in achieving stratification conditions. Therefore, the MPS method used in this simulation has a good enough capability to simulate the liquid stratification phenomena, which can be implemented in conditions of the melted reactor core prototype.