Validation of multiphase water wave propagation using smoothed particle hydrodynamics

Abstract

Water wave propagation is one of the classical problems in free surface flow that involved water and air. There are a lot of studies have been conducted on both experimental and numerical methods. One numerical method is computational fluid dynamics (CFD), which is divided into two major i.e. CFD mesh-based and meshfree. In this paper, smoothed particle hydrodynamics (SPH) is used to carry out a study of water wave propagation. SPH is a mesh-free CFD and Lagrangian approach that is suitable for free surface flow such as water waves. Two-phase SPH was used to reproduce long-distance propagation using a piston-type wavemaker. The wave probe was set 24.6 m in front of the wavemaker with a water depth is 0.75 m. The wave period is 1.15 s with an amplitude of the wavemaker is 33.0 mm. The simulation is carried out with a water and air phase (multiphase). The results indicate SPH is in reasonable agreement with experimental for the wave height, celerity, and amplitude.