Free-Surface Flow Simulations with Smoothed Particle Hydrodynamics Method using High-Performance Computing

Abstract

Today, the use of modern high-performance computing (HPC) systems, such as clusters equipped with graphics processing units (GPUs), allows solving problems with resolutions unthinkable only a decade ago. The demand for high computational power is certainly an issue when simulating free-surface flows. However, taking the advantage of GPU's parallel computing techniques, simulations involving up to 10 9 particles can be achieved. In this framework, this chapter shows some numerical results of typical coastal engineering problems obtained by means of the GPU-based computing servers maintained at the Environmental Physics Laboratory (EPhysLab) from Vigo University in Ourense (Spain) and the Tier-1 Galileo cluster of the Italian computing centre CINECA. The DualSPHysics free package based on smoothed particle hydrodynamics (SPH) technique was used for the purpose. SPH is a meshless particle method based on Lagrangian formulation by which the fluid domain is discretized as a collection of computing fluid particles. Speedup and efficiency of calculations are studied in terms of the initial interparticle distance and by coupling DualSPHysics with a NLSW wave propagation model. Water free-surface elevation, orbital velocities and wave forces are compared with results from experimental campaigns and theoretical solutions.

Efficiency and survivability analysis of a point-absorber wave energy converter using DualSPHysics

“…DualSPHysics is open-source (www.dual.sphysics.org) and allows applying the SPH method to real engineering problems. It can be executed not only on CPUs, but also on GPU (Graphics Processing Unit) cards with powerful parallel computing that can be installed in a personal computer (Altomare et al, 2018). The DualSPHysics code has been applied in this work since it includes the coupling with the opensource multiphysics platform Project Chrono (Tasora et al, 2016), which is capable of simulating collisions and kinematic restrictions such as springs, hinges, pulleys, etc.…”

Performance Assessment of a Planing Hull Using the Smoothed Particle Hydrodynamics Method

“…The recent growth in using CFD simulations can be generally credited to the fastgrowing computational capacity of entry-level solutions, which presently can balance the high demand for resources of such methods [32]. The SPH-based DualSPHysics code [33] is an open-source solver (LGPL license), developed mainly for coastal engineering applications.…”