An improved MPS method for simulating multiphase flows characterized by high-density ratios and violent deformation of interface

Abstract

An improved Moving-Particle Semi-Implicit (MPS) method is proposed for multiphase flows with high-density ratios and violent deformation of the interface. First, a particle number density compensation (PNDC) model is developed to remove the ghost particles out of the boundary thoroughly. The model is verified via static pressure simulations. Then, based on previous works (Shakibaeinia et al., 2012; Khayyer et al., 2013; Duan et al., 2017 [1]; Duan et al., 2017 [2]; Sun et al., 2015), the MPS method is extended to a multiphase flow solver. Finally, the improved MPS method is applied to model static pressure, Rayleigh–Taylor instability, sloshing flow, and two-phase dam-break. The comparative analysis with the available experimental datum and other published numerical results proved the applicability and accuracy of the proposed MPS method for simulating multiphase flows with high-density ratios and violent deformation of interface.