3-D simulation of plunging jet penetration into a denser liquid pool by the RD-MPS method

We used the rigid body dynamics coupled moving particle semi-implicit (RD-MPS) method (Park and Jeun, 2011) to simulate a plunging liquid jet penetrating into a denser liquid pool in two and three dimensions. Our improved algorithm revisited the simulation by Ikeda et al. (2001) that simulated special fuel–coolant interactions (FCI) during severe accidents in nuclear power plants when a coolant water jet was forcedly injected into a melt pool. The simulation results suggested that the coupled model improved the stability of simulation on dynamic interactions of multi-phase incompressible fluids. Phenomenologically, the 3-D simulation for the plunging water jet in a confined geometry showed better agreement with experimental results than the 2-D simulation did.