Simulation of Multiliquid Layer Sloshing With Vessel Motion by Using Moving Particle Semi Implicit Method

Abstract

For oil/gas production/processing platforms, multiple liquid layers can exist and their respective sloshing motions can also affect operational effectiveness or platform performance. To numerically simulate those problems, a new multiliquid moving particle simulation (MPS) method is developed. In particular, to better simulate the relevant physics, robust selfbuoyancy model, interface searching model, and surfacetension model are developed. The developed multiliquid MPS method is validated by comparisons against experiment in which threeliquidsloshing experiment and the corresponding linear potential theory are given. The validated multiliquid MPS program is subsequently coupled with a vesselmotion program in time domain to investigate their dynamiccoupling effects. In case of multiple liquid layers, there exists a variety of sloshing natural frequencies for respective interfaces, so the relevant physics can be much more complicated compared with the singleliquidtank case. The simulation program can also reproduce the detailed smallscale interface phenomenon called Kelvin–Helmholtz instability. The numerical simulations also show that properly designed liquid cargo tank can also function as a beneficial antirolling device.