In this paper, a modified MPS (Moving Particle Semi-Implicit) method is applied into 3D liquid sloshing to show its capability in modeling 3D sloshing flows. Violent sloshing flow in 3D rectangular is investigated. Furthermore, impact pressure value obtained by 2D and 3D simulation is compared, which indicates that 3D MPS simulation is able to produce smoother pressure field and thus makes better agreement with experiment than 2D MPS simulation. In addition, the snapshots of free surface deformation and velocity field are compared between experiment, 2D and 3D MPS simulation. Results show that the details of free surface deformation, such as the breaking region of the wave and the splash of liquid fluid can be capsized by 3D MPS method effectively.

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