Enhanced weakly-compressible MPS method for violent free-surface flows: Role of particle regularization techniques

This paper develops a consistent particle method for capturing the highly non-linear behavior of violent free-surface flows, based on an Enhanced Weakly Compressible Moving Particle Semi-implicit (EWC-MPS) method. It pays special attention to evaluation and improvement two regularization techniques, namely, pairwise collision (PC) shifting (PS). To improve effectiveness PC in removing noisy pressure field, volume conservation issue PS, we propose evaluate several enhancements these including novel dynamic technique, PS algorithm with new boundary treatments additional terms (in continuity momentum equations). Besides, introduce modified higher-order anti-symmetric operators diffusive shear force terms. Evaluation proposed developments flow benchmark cases (2D dam-break, 3D water sloshing, dam-break obstacle) confirms accurate prediction evolution rigid body impact, as well long-term stability simulations. The reduces noises low energy dissipation, conserves even extreme deformations. Comparing role techniques demonstrates both assuring uniformity distribution fields; nevertheless, implementation is found be more complex time-consuming, mainly due its need free surface detection tuning parameters.