State-of-the-art of classical SPH for free-surface flows

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

doi:10.1080/00221686.2010.9641242

Cited by 286 publications

(109 citation statements)

References 69 publications

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“…Smoothed-particle hydrodynamics (SPH) is also a mesh-free method which can be used to describe accurately the 3D surf zone hydrodynamics, as recently shown by Farahani and Dalrymple (2014) who investigated some novel coherent turbulent vortical structures under broken solitary waves. The state-of-the-art is detailed by Gomez-Gesteira et al (2010) and Violeau and Rogers (2016), who detailed a number of examples in which SPH simulations have been successfully used in fluid flow research and hydraulic engineering. Numerical models still rely on experimental data.…”

Section: Introductionmentioning

confidence: 99%

Are breaking waves, bores, surges and jumps the same flow?

Lubin

Chanson

2016

Environ Fluid Mech

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The flow structure in the aerated region of the roller generated by breaking waves remains a great challenge to study, with large quantities of entrained air and turbulence interactions making it very difficult to investigate in details. A number of analogies were proposed between breaking waves in deep or shallow water, tidal bores and hydraulic jumps. Many numerical models used to simulate waves in the surf zone do not implicitly simulate the breaking process of the waves, but are required to parameterise the wave-breaking effects, thus relying on experimental data. Analogies are also assumed to quantify the roller dynamics and the energy dissipation. The scope of this paper is to review the different analogies proposed in the literature and to discuss current practices. A thorough survey is offered and a discussion is developed an aimed at improving the use of possible breaking proxies. The most recent data are revisited and scrutinised for the use of most advanced numerical models to educe the surf zone hydrodynamics. In particular, the roller dynamics and geometrical characteristics are discussed. An open discussion is proposed to explore the actual practices and propose perspectives based on the most appropriate analogy, namely the tidal bore.

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Section: Introductionmentioning

confidence: 99%

Are breaking waves, bores, surges and jumps the same flow?

Lubin

Chanson

2016

Environ Fluid Mech

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“…Free surface elevations of the considered case studies are presented in Figs. 8,9,10,11,12,13. As seen in these plots, asymmetry wedge water entry has lead to asymmetry free surface shape.…”

Section: Asymmetry Water Entrymentioning

confidence: 90%

Simulation of 2D symmetry and asymmetry wedge water entry by smoothed particle hydrodynamics method

Farsi

Ghadimi

2014

J Braz. Soc. Mech. Sci. Eng.

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This article presents a study of fluid-solid interaction in a free surface flow by smoothed particles hydrodynamics method. Different cases of symmetry and asymmetry wedge water entries are presented. All cases are performed at constant speed, considering the effect of gravity. First-order density filter, turbulence modeling and a pressure filter have been utilized. Through these compiling options, low-pass pressure filter has been able to eliminate the undesirable fluctuation of pressure, and good results have been achieved. Pressure distribution and free surface profiles have been produced in all cases. In the cases of symmetry wedge water entries, the obtained results were compared against the results of BEM, similarity and asymptotic solutions, but in the cases of asymmetry wedge water entry, the obtained results were compared against those of analytical work. Through these comparisons, it was found that although the general trend of the computed pressure distributions follows the results of the previous studies, there still exist some differences among them. Main difference between the obtained results and other studies is related to the position of the pressure peak. It was concluded that this may indeed be attributed to the nature of the applied methods and due to the methodology of cutting the edges in schemes like BEM to overcome the abrupt flow at the edge. Vertical force in particular symmetry and asymmetry cases was also computed and presented. It was found that the global behavior of the vertical force in both the symmetry and asymmetry wedge water entry is the same and that there are some differences among them in terms of decreasing rate as well as the maximum value of the force.

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“…Recent comprehensive reviews and related applications of the SPH method are given in [84][85][86][87][88][89]. Governing equations describing the motion of fluids are usually given as a set of partial differential equations (PDEs).…”

Section: Sph Fundamentalsmentioning

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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State-of-the-art of classical SPH for free-surface flows

Cited by 286 publications

References 69 publications

Are breaking waves, bores, surges and jumps the same flow?

Are breaking waves, bores, surges and jumps the same flow?

Simulation of 2D symmetry and asymmetry wedge water entry by smoothed particle hydrodynamics method

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

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