3D GPU-based SPH simulation of water waves impacting on a floating object

Abstract

Smoothed particle hydrodynamics (SPH) is meshless-based numerical method to simulate free-surface flow problems. In this paper, water wave impact on a floating object is studied by implementing SPH method. An open-source DualSPHysics code which is developed based on SPH theory is used to simulate three-dimensional (3D) free-surface flow with floating object. Graphical processing units (GPUs) parallel computing is applied to accelerate computational time of SPH method. The simulation is aimed to investigate the effect of water wave impact on floating object. The water wave is generated by piston-type wave maker in a flume. The frequency of piston is varied from 0.1 Hz to 0.6 Hz to evaluate vertical displacement of floating object. The simulation of free-surface flow and its interaction with floating object mimics a physically realistic phenomenon. It is obtained that the highest vertical displacement of floating object is achieved when piston frequency is 0.3 Hz. The piston frequency of 0.4 Hz–0.6 Hz yields high impact which makes the floating object is drowned and pushed to shoreline faster than other frequencies.