Study on Fluid Descends Vertically on Static Fluid Using Moving Particle Semi-Implicit Method

Abstract

The process of fluid descend vertically on static fluid has been studied through experiment and simulation by using Moving Particle Semi-Implicit (MPS) method. MPS has been developed by Koshizuka and Oka (1996). MPS method is a particle method based on the Lagrangian calculation for incompressible medium and does not rely on grid system. This study has been done by doing simulation first then validated by experiment. Water and cooking oil were used in the experiment. This study was carried out to analyze distance and density influence in the height of static fluid bursting process. The experiments were conducted in an acrylic box with the dimension 150 mm x 40 mm x 30 mm and a bottle with height of 100 mm and the nozzle of bottle was 26 mm. The distance between nozzle and surface of fluid inside box is varied for 100 mm and 200 mm. The results show that in the same height, water will be more difficult to be moved than cooking oil because water has bigger density. The distance between nozzle and fluid surface inside the box will affect at the pressure which is received by the fluid. Higher distance will create higher pressure so that fluid inside the box will be moved easier and more fluid will split out to the box. It also gives some influence in the final condition of remaining fluid in the acrylic box.

Numerical Study on Relocation Process of Al, Fe, and Pb by Using the Moving Particle Semi-Implicit Method During Severe Accident of Reactor

“…Therefore, it is expected that the temperature did not significantly impact the relocation process, which agrees with Hidayati et al (2020). Furthermore, the splash pattern of this study is similar to the results of Hidayati et al (2021). The splash will arise if the fallen liquid has a higher density where the difference in density between the two is big enough.…”

“…While there are many studies analyzing melting interactions between the melted core and solid materials during reactor core melting, there is still limited simulation on the relocation of molten fluids. Studies of the relocation process of some liquids were performed by some researchers, such as Li et al (2013) with silicon oil and salt water, Ilham et al (2018) with freshwater, and Hidayati et al (2021) with cooking oil and freshwater. In this study, the liquids of Al, Fe, and Pb are utilized.…”

MPS Simulation on the Corium Melt Flow in Case of Reactor Accident

“…The MPS simulation result in Figure 7 shows that the flow time significantly decreases as a function of temperature. The effect of leak hole size was not obtained in this finding, contrary to the simulation by Hidayati et al, which concluded that the hole size significantly affected the required displacement time [15]. However, these results are similar to the results of Gen Li, et al which showed that at high temperatures the melt transfer of ZrO2 and UO2 becomes faster [9].…”

Simulasi Pelelehan Freeze Plug Termodifikasi pada Molten Salt Reactor Menggunakan Metode Moving Particle Semi-implicit

“…Salah satu metode yang dapat digunakan untuk menganalisis proses pelelehan freeze plug adalah metode Moving Particle Semiimplicit (MPS). Metode berbasis partikel ini telah digunakan pada penelitian sebelumnya terkait pengaruh penambahan material tembaga dalam freeze plug [8] dan beberapa kasus nuklir lainnya [9][10][11][12].…”