SPH Numerical Simulation of Interaction Between Different Types of Baffles and Liquid Sloshing

Liquid sloshiness refers to the movement of liquid in a container due to external force or its own gravity, and there is a free surface that can move freely and has strong nonlinear and random characteristics. With the development of oil, gas, and Marine mining and Marine aquaculture in offshore engineering, more and more floating production and storage tankers, liquefied natural gas carriers (LNG) and other liquid-carrying vessels are used to store offshore oil and transport natural gas. 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. In this paper, the numerical simulation of liquid sloshing under different baffles is carried out based on the smoothed particle hydrodynamics (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. A physical experiment platform is used to verify the feasibility and effectiveness of the numerical model. 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.