Neighbour lists in smoothed particle hydrodynamics

Domínguez, José M.; Crespo, A. J. C.; Marongiu, Jean-Christophe

doi:10.1002/fld.2481

Cited by 136 publications

(85 citation statements)

References 41 publications

(53 reference statements)

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“…For a particle that is located inside a cell, only the interactions with particles of neighboring cells must be In each step of the SPH method, the interactions between different particles are calculated using traversal paired searches for certain particles in the computation domain, and this leads to an increased computation time. In this paper, a cell-linked list search method is used to construct the computation framework, and the computation domain is divided into "background cells" shown in Figure 2 [34].…”

Section: Model Framework and Simulation Methodsmentioning

confidence: 99%

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

Wan

Gualtieri

et al. 2017

Water

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Aerated flows are characterized by complex hydrodynamics and mass-transfer processes. As a Lagrangian method, smoothed particle hydrodynamics (SPH) has a significant advantage in tracking the air-water interface in turbulent flows. This paper presents the application of an SPH method to investigate hydrodynamics and reaeration over stepped spillways. In the SPH method, the entrainment of dissolved oxygen (DO) is studied using a multiphase mass transfer SPH method for reaeration. The numerical results are compared with the hydrodynamics data from Chanson and DO data from Cheng. The simulation results show that velocity distribution and the location of free-surface aeration inception agree with the experimental results. Compared with the experimental results, the distribution of DO concentration over the stepped spillway is consistent with the measurement results. The study shows that the two-phase DO mass transfer SPH model is reliable and reasonable for simulating the hydrodynamics characteristics and reaeration process.

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Section: Model Framework and Simulation Methodsmentioning

confidence: 99%

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

Wan

Gualtieri

et al. 2017

Water

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“…The cell-linked list described in Ref. [54] is implemented in DualSPHysics. This approach is preferred to the traditional approach, named Verlet list [101] that implies higher memory requirements than the cell-linked list.…”

Section: The Dualsphysics Codementioning

confidence: 99%

“…This approach is preferred to the traditional approach, named Verlet list [101] that implies higher memory requirements than the cell-linked list. Besides, [54] proposed an innovative searching procedure based on a dynamic updating of the Verlet list and analyzed the efficiency of all the algorithms in terms of computational time and memory requirements.…”

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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“…Note that the neighbor list is updated every time step while the potential neighbor list is updated every N time steps. The value of N was suggested to be taken as 7, r c and r s can be taken as 2.5r and 3.2r respectively, where r is the radius of the interacting particles (Verlet, 1967;Dominguez et al, 2011).…”

Section: Neighboring Particle Searching Algorithmmentioning

confidence: 99%

SPH-based numerical modeling for the post-failure behavior of the landslides triggered by the 2016 Kumamoto earthquake

Dai

Wang

Huang

et al. 2016

Geoenviron Disasters

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Background: The 2016 Kumamoto earthquake triggered many fast landslides in Kyushu Region, Japan, which caused great damages and increased difficulty of rescue after the earthquake. The post-failure behavior analysis of the earthquake-triggered landslides is of great importance to determine the hazardous areas and estimate the extent of damage. Results: The features of the landslides triggered by the Kumamoto earthquake were presented and the damages caused were described based on the field investigation. Then, a mesh-free particle method called smoothed particle hydrodynamics (SPH) was introduced and a 3D numerical model was established based on a Bingham flow model and the equations of continuity and motion. Applying this model, two typical fast landslides in the Kumamoto earthquake zone were simulated. Their propagations were reproduced and the time histories of the velocity and run-out distance were obtained. Conclusions:The run-out distances simulated matched the in-situ evidences, thus verifying the calculation accuracy of the SPH model. The SPH-based approach presented in this work for the post-failure behavior analysis should contribute to the prevention and mitigation of fast landslide disaster.

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Neighbour lists in smoothed particle hydrodynamics

Cited by 136 publications

References 41 publications

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

Numerical Simulation of Hydrodynamics and Reaeration over a Stepped Spillway by the SPH Method

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

SPH-based numerical modeling for the post-failure behavior of the landslides triggered by the 2016 Kumamoto earthquake

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