SPHysics – development of a free-surface fluid solver – Part 1: Theory and formulations

Gesteira, Moncho Gómez; Rogers, Benedict D.; Crespo, A. J. C.; Dalrymple, Robert A.; Narayanaswamy, Muthukumar

doi:10.1016/j.cageo.2012.02.029

Cited by 307 publications

(157 citation statements)

References 37 publications

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“…Therefore, high pressure accompanied by high, dammed-up flows may damage the bridge girder via the action of a strong fluid force. Note that some differences of pressure distributions immediately in front of the bridge girder were blank owing to the removal of particles whose pressures were abnormal or oscillated, likely because of the weak compressibility treatment 19) . In further analysis of the effect of the pressure distribution on the bridge, we obtained vertical profiles of pressure in terms of the height from channel the bottom (i.e., depth, H(Z)) immediately in front of the bridge (Fig.…”

Section: Results and Discusionmentioning

confidence: 99%

Simulation of Driftwood-induced Flooding during High-intensity Rainfall using Smoothed Particle Hydrodynamics Method

2014

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Worldwide climate change has resulted in severe flooding in Japan in the last decade. Some floods were likely caused by the substantial accumulation of driftwood or debris at bridges crossing rivers in mountainous areas. In this study, for a two-dimensional open channel, we conducted a laboratory experiment and numerical simulation with and without driftwood modeling to clarify the physical mechanism of a flood event resulting from driftwood accumulation at a bridge. Open-source software SPHysics, implementing a smoothed particle hydrodynamics method, was calibrated with data of the water level measured near a miniature bridge in the laboratory experiment. The simulation clearly showed that the particle-like flow was scattered by the bridge girder and dammed up by the bridge in the upstream direction. By changing the quantity of driftwood, we analyzed the effect of a flood on a bridge. For the largest quantity of driftwood, the higher pressure pushing against the bridge may damage the bridge.

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Section: Results and Discusionmentioning

confidence: 99%

Simulation of Driftwood-induced Flooding during High-intensity Rainfall using Smoothed Particle Hydrodynamics Method

2014

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“…DualSPHysics [98][99][100] is an open-source code developed by the University of Vigo (Spain) and the University of Manchester (UK) in collaboration with experts from all around the globe that can be freely downloaded from www.dual.sphysics.org. The code, written in two languages, namely, C++ and CUDA, is capable of using the parallel processing power of either CPUs or GPUs making the study of real engineering problems possible.…”

Section: The Dualsphysics Codementioning

confidence: 99%

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

Altomare¹,

Viccione²,

Tagliafierro³

et al. 2018

Computational Fluid Dynamics - Basic Instruments and Applications in Science

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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.

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“…There are several methods to sample particles on a mesh. The platform of open source SPH codes, e.g., SPHysics [33], provides a preprocessor [34] that allows users to use Blender (http://www.blender.org) to create the meshes representing the surfaces of the entire scene. Next, each mesh face is subdivided until the newly created vertices on the face are distributed such that the length of any mesh edge does not exceed a given threshold d 0 (usually the initial fluid particle spacing).…”

Section: On Complex Surfacesmentioning

confidence: 99%

Particle-based fluids for viscous jet buckling

Andrade

Sandim

Petronetto

et al. 2015

Computers & Graphics

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SPHysics – development of a free-surface fluid solver – Part 1: Theory and formulations

Cited by 307 publications

References 37 publications

Simulation of Driftwood-induced Flooding during High-intensity Rainfall using Smoothed Particle Hydrodynamics Method

Simulation of Driftwood-induced Flooding during High-intensity Rainfall using Smoothed Particle Hydrodynamics Method

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

Particle-based fluids for viscous jet buckling

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