A comparison between Smoothed-Particle Hydrodynamics and RANS Volume of Fluid method in modelling slamming

Sasson, Marcus; Chai, Shuhong; Beck, G; Jin, Yuting; Rafieshahraki, Jalal

doi:10.1016/j.joes.2016.03.004

Cited by 23 publications

(7 citation statements)

References 11 publications

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“…The smaller the SPH particles, the smoother the reaction curve, but no major difference in trend or order of magnitude was noted between the results obtained with r = 1 mm, r = 2 mm and r = 3 mm. It was also noted by other authors that increasing the SPH domain resolution beyond a certain point only helps smoothening the results, with marginal accuracy improvements Korzani et al (2017); Sasson et al (2016). Simulations with r = 1mm allowed achieving a penetration depth of 10 mm or less before the cut off time of 48 hours, which was not suitable for our study.…”

Section: Geometry Interfaces and Boundary Conditionsmentioning

confidence: 78%

Simulation of compound anchor intrusion in dry sand by a hybrid FEM+SPH method

Karsai

Liu

et al. 2023

Computers and Geotechnics

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Section: Geometry Interfaces and Boundary Conditionsmentioning

confidence: 78%

Simulation of compound anchor intrusion in dry sand by a hybrid FEM+SPH method

Karsai

Liu

et al. 2023

Computers and Geotechnics

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“…The turbulence is represented by the instantaneous values of the flow properties [8]. The equations for turbulence fluctuation are obtained by Reynolds de-composition, which substitutes instantaneous velocity and pressure fields for a mean value and a fluctuating component [27]. These components are substituted into the non-dimensional continuity and momentum equations using the time averaging:…”

Section: Reynolds-averaged Navier-stokes Equations (Rans)mentioning

confidence: 99%

“…The k-ω was also used by Zhou et al to study the response of a floating offshore wind turbine (FOWT) for a first-order irregular waves group [3]. Besides, some researchers have compared both methods in order to define their differences and see how the selection of each one affects to the final result [27].…”

Section: Introductionmentioning

confidence: 99%

Performance Assessment of Three Turbulence Models Validated through an Experimental Wave Flume under Different Scenarios of Wave Generation

Galera-Calero¹,

Ilzarbe

Izquierdo³

et al. 2020

JMSE

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This study aimed to adjust the turbulence models to the real behavior of the numerical wave flume (NWF) and the future research that will be carried out on it, according to the turbulence model that best adjusts to each particular case study. The k-ε, k-ω and large-eddy simulation (LES) models, using the volume of fluid (VOF) method, were analyzed and compared respectively. The wavemaker theory was followed to faithfully reproduce the waves, which were measured in an experimental wave flume (EWF) and compared with the theory to validate each turbulence model. Besides, reflection was measured with the Mansard and Funke method, which has shown promising results when studying one of the most critical turbulent behaviors in the wave flume, called the breaking of the waves. The free surface displacement obtained with each turbulence model was compared with the recorded signals located at three points of the experimental wave flume, in the time domain of each run, respectively. Finally, the calculated reflection coefficients and the amplitudes of the reflected waves were compared, aiming to have a better understanding of the wave reflection process at the extinction zone. The research showed good agreement between all the experimental signals and the numerical outcomes for all the turbulence models analyzed.

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“…Only a limited number of studies reported the effects of different values of particle spacing and smoothing length together. Sasson, et al [40] provided an investigation of different values for both the particle distance and the smoothing length ratio for a slamming body model. Different ratios were only tried on the finest particle distance value to find the most suitable ratio of 1.9.…”

Section: Introductionmentioning

confidence: 99%

Exploration of Two Different Length Scale Refinement Strategies on the Application of SPH Simulations on 3D Free-surface Flows

Tran,

Roberts,

Hastie

2024

Preprint

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A length scale refinement study is a standard practice to ensure the independence of a numerical model on spatial approximations. For smoothed particle hydrodynamics (SPH), the process of length scale refinement study tends to be conducted based on experience. A challenge of defining a universal length scale refinement strategy is the existence of two length scales – particle spacing and smoothing length. Despite the challenge, further investigations of the impact of different refinement strategies should be continually conducted to improve the reliability of practical SPH applications on 3D free-surface flows. In this study, a conventional strategy and a novel coupled refinement strategy are used to investigate the convergence of SPH simulations for free-surface flows using a standard SPH scheme available in an open-source framework. The two case studies are a dam break flow and a lesser-known stable regime water flow inside a rotating drum with lifters. Validations are conducted using existing literature data for the dam break flow and laser Doppler velocimetry (LDV) measurements for the rotating drum flow. The investigation shows that the proposed coupled length scale refinement strategy does not offer a significant improvement for the SPH model of the dam break flow comparing to the conventional strategy. On the other hand, the stable regime rotating drum fluid flow shows that both refinement strategies are not sufficient to tackle SPH’s on-going fundamental challenge of accurately predicting the flow field of complex 3D turbulent flows with free surfaces.

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A comparison between Smoothed-Particle Hydrodynamics and RANS Volume of Fluid method in modelling slamming

Cited by 23 publications

References 11 publications

Simulation of compound anchor intrusion in dry sand by a hybrid FEM+SPH method

Simulation of compound anchor intrusion in dry sand by a hybrid FEM+SPH method

Performance Assessment of Three Turbulence Models Validated through an Experimental Wave Flume under Different Scenarios of Wave Generation

Exploration of Two Different Length Scale Refinement Strategies on the Application of SPH Simulations on 3D Free-surface Flows

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