Abstract

With oil and gas extraction in offshore engineering, more and more floating production storage vessels and liquefied natural gas vessels (LNG) are being used for offshore oil storage and natural gas transportation. In order to ensure the transportation of oil and natural gas at sea, people pay more attention to the movement of multiphase flow and the fluid-solid coupling with the transport structure. Therefore, it is of great scientific significance and engineering application value to establish a suitable calculation and analysis method to solve the problem of liquid sloshing in multiphase flow under different baffles and reveal its anti-sloshing mechanism.

In this paper, the numerical simulation of liquid sloshing under different baffles is carried out based on SPH method. Based on the governing equations of continuum mechanics, a model for calculating the sloshing motion of gas-liquid two-phase flow in a tank is established and discretized by SPH kernel approximation and particle approximation techniques. The influence of the physical parameters of the baffle on the liquid swaying is studied, including the flexibility, height, width and shape of the baffle, which provides a reference for the selection of baffle parameters. The effects of different baffles on the motion of oil-gas interface and the load on bulkhead under the condition of 20% liquid loading rate are calculated and compared.

Keywords: Fluid sloshing; Fluid-structure coupling; A baffle plate; SPH, Numerical simulation