Two-dimensional free-surface flow under gravity: A new benchmark case for SPH method

Wu, Jianzhao; Fang, Le

doi:10.1063/1.5021678

Cited by 2 publications

(1 citation statement)

References 37 publications

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“…Several Benchmark studies have been performed in free surface hydraulic flows e.g. flow over a weir [8] or very recently free surface jets impact [9]. As far as the authors are aware, this is the first application of SPH in simulating free-surface vortex flows.…”

Section: Physical Modelmentioning

confidence: 99%

Vortex Siphon – From 1:1 Scale Physical Model to SPH Simulation and Prototype

Bart

Macherel

Cesare

et al. 2020

Advances in Hydroinformatics

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The rail link between Geneva Cornavin Station, Eaux-Vives Station and Annemasse (CEVA) is currently under construction including a cut-and-cover tunnel built by slurry walls located in the alluvium of the Foron River. The covered trench cuts the groundwater table flow which causes a rise of the water table on one side of the tunnel. Thirty wells were built in order to convey water from the aquifer on one side of the tunnel to the other. For each well, traditional pumping has been replaced by a self-priming multiphase siphon in order to lower energy costs. The operating principle of the system is based on the sustaining of a free-surface vortex flow in a vacuum chamber. In this way, the multiphase siphon is primed to allow water to be transferred from either side of the tunnel. A physical model of the conveyance system has been constructed at a scale of 1:1 in order to avoid scale effects from the presence of air water mixture and due to the free-surface vortices sensitivity to scaling, particularly in a vacuum atmosphere. In this study, the results from the physical model are used to validate a Smoothed Particle Hydrodynamics (SPH) numerical simulation of the complex flow conditions. The DualSPHysics code is employed and the results presented herein regarding the depth discharge relationship are encouraging for further application in vortex flows and such devices where conventional Eulerian modelling approaches can be challenging. As far as the authors are aware, this is the first application of SPH in simulating vortex chamber flows and the result bodes well for further application in this area.

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Section: Physical Modelmentioning

confidence: 99%

Vortex Siphon – From 1:1 Scale Physical Model to SPH Simulation and Prototype

Bart

Macherel

Cesare

et al. 2020

Advances in Hydroinformatics

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On different calculation formulas of the pressure term in bi-phase SPH simulations

Chen

Wei

2018

AIP Advances

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The smoothed particle hydrodynamics (SPH) method is usually expected to be an efficient numerical tool for calculating the multiphase phenomena in compressors. However, numerical instability arises around the interfaces due to the pressure inconsistency. By analyzing different formula of the pressure term under SPH approximation, we show that the frequently-used formulation (n=-1) leads to the worst performance and is thus not recommended. By contrast, we suggest the formulas n=0 and 1 in future practical SPH applications.

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Two-dimensional free-surface flow under gravity: A new benchmark case for SPH method

Cited by 2 publications

References 37 publications

Vortex Siphon – From 1:1 Scale Physical Model to SPH Simulation and Prototype

Vortex Siphon – From 1:1 Scale Physical Model to SPH Simulation and Prototype

On different calculation formulas of the pressure term in bi-phase SPH simulations

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