A two-phase consistent particle method for wave impact problems with entrapped air pockets

Abstract

The wave impact problem with entrapped air pockets is a significant phenomenon in engineering, but has been rarely addressed due to the great complexities. In this context, this study proposes a two-phase model that can accurately simulate this problem based on the recently developed Consistent Particle Method. The novelty of this model lies in three key aspects: (1) rational treatment of density discontinuity at the water-air interface without any smoothing or smearing scheme, (2) a thermodynamics-based compressible solver for modelling compressible air that eliminates the need of determining the artificial sound speed, and (3) two-phase coupling of compressible air solver and incompressible water solver without iteration between the two solvers. This method is shown to be robust and accurate in the simulation of two-phase incompressible and compressible flows with large density difference. For validation purpose, in addition to compare with the published results in the literature, experimental studies are conducted.