A Comparison Between Weakly-Compressible Smoothed Particle Hydrodynamics (WCSPH) and Moving Particle Semi-Implicit (MPS) Methods for 3D Dam-Break Flows

Lagrangian particle-based methods have opened new perspectives for the investigation of complex problems with large free-surface deformation. Some well-known adopted to solve non-linear hydrodynamics are smoothed particle (SPH) and moving semi-implicit (MPS). Both modeled continuum by a system particles (points) but adopting distinct approaches numerical operators, pressure calculation, boundary conditions. Despite ability in modeling highly nonlinear hydrodynamics, some shortcomings, such as unstable computation high computational cost remains. In order assess performance these two methods, weaklycompressible SPH (WCSPH) parallel solver, DualSPHysics, an in-house incompressible MPS solver this work. Two test cases consisting threedimensional (3D) dam-break simulated, wave heights, pressures forces compared available experimental data. The influence artificial viscosity on accuracy WCSPH is investigated. Computational times both solvers also compared. Finally, relative benefits solving discussed, therefore providing directions their applicability.