Dépouillements

State-of-the-art of classical SPH for free-surface flows / Moncho Gomez-Gesteira in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 6-27 Titre : State-of-the-art of classical SPH for free-surface flows Titre original : Etat de l'art de la méthode SPH pour les écoulements à surface libre Type de document : texte imprimé Auteurs : Moncho Gomez-Gesteira, Auteur ; Benedict D. Rogers, Auteur ; Robert A. Dalrymple, Auteur Année de publication : 2010 Article en page(s) : pp. 6-27 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Computational  fluids  Dam  break  Density  correction  Kernel  correction  Smoothed  particle  hydrodynamics  SPH Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Smoothed Particle Hydrodynamics (SPH) is the most widely established mesh-free method which has been used in several fields as astrophysics, solids mechanics and fluid dynamics. In the particular case of computational fluid dynamics, the model is beginning to reach a maturity that allows carrying out detailed quantitative comparisons with laboratory experiments. Here the state-of-the-art of the classical SPH formulation for free-surface flow problems is described in detail. This is demonstrated using dam-break simulations in 2-D and 3-D. The foundations of the method will be presented using different derivations based on the method of interpolants and on the moving least-squares approach. Different methods to improve the classic SPH approach such as the use of density filters and the corrections of the kernel function and its gradient are examined and tested on some laboratory cases. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] State-of-the-art of classical SPH for free-surface flows = Etat de l'art de la méthode SPH pour les écoulements à surface libre [texte imprimé] / Moncho Gomez-Gesteira, Auteur ; Benedict D. Rogers, Auteur ; Robert A. Dalrymple, Auteur . - 2010 . - pp. 6-27. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 6-27 Mots-clés : Computational  fluids  Dam  break  Density  correction  Kernel  correction  Smoothed  particle  hydrodynamics  SPH Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Smoothed Particle Hydrodynamics (SPH) is the most widely established mesh-free method which has been used in several fields as astrophysics, solids mechanics and fluid dynamics. In the particular case of computational fluid dynamics, the model is beginning to reach a maturity that allows carrying out detailed quantitative comparisons with laboratory experiments. Here the state-of-the-art of the classical SPH formulation for free-surface flow problems is described in detail. This is demonstrated using dam-break simulations in 2-D and 3-D. The foundations of the method will be presented using different derivations based on the method of interpolants and on the moving least-squares approach. Different methods to improve the classic SPH approach such as the use of density filters and the corrections of the kernel function and its gradient are examined and tested on some laboratory cases. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

Smoothed particle hydrodynamics (SPH) simulation of a tuned liquid damper (TLD) with angular motion / Gabriele Bulian in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 28-39 Titre : Smoothed particle hydrodynamics (SPH) simulation of a tuned liquid damper (TLD) with angular motion Titre original : Simulation d'un amortisseur liquide (TLD) en rotation à l'aide de la méthode SPH Type de document : texte imprimé Auteurs : Gabriele Bulian, Auteur ; Antonio Souto-Iglesias, Auteur ; Louis Delorme, Auteur Année de publication : 2010 Article en page(s) : pp. 28-39 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Roll  SDOF  Single  degree  of  freedom  systems  Smoothed  particle  hydrodynamics  SPH  TLD  Tuned  liquid  damper  Wave  breaking Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The roll motion response of a single degree of freedom (SDOF) structural system to which a rigid rectangular partially filled liquid tank has been attached is considered. The SDOF structural system with the empty tank is first described with a mathematical model and this model is validated by performing decay experiments as well as experiments in which periodic excitations are applied to the system. The responses are accurately predicted by the model. The accuracy of these predictions allows us to study both experimentally and numerically, with weakly compressible SPH, the performance of the partially filled tank as a tuned liquid damper (TLD). The sloshing flows inside the tank comprise the onset of breaking waves which make the TLDs devices extremely difficult to model, especially for the potential flow multimodal approaches commonly used to simulate these sorts of coupled systems. In order to characterise the wave breaking effects on the response curves, tests have been performed with liquids of different viscosity, the increasing viscosity preventing the onset of breaking waves. The capabilities of SPH to treat this coupling problem are assessed and the results show that SPH is able to capture a substantial part of the physics involved in the addressed phenomena but further work remains still to be done relating to a more accurate treatment of the laminar viscosity and turbulence effects. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Smoothed particle hydrodynamics (SPH) simulation of a tuned liquid damper (TLD) with angular motion = Simulation d'un amortisseur liquide (TLD) en rotation à l'aide de la méthode SPH [texte imprimé] / Gabriele Bulian, Auteur ; Antonio Souto-Iglesias, Auteur ; Louis Delorme, Auteur . - 2010 . - pp. 28-39. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 28-39 Mots-clés : Roll  SDOF  Single  degree  of  freedom  systems  Smoothed  particle  hydrodynamics  SPH  TLD  Tuned  liquid  damper  Wave  breaking Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The roll motion response of a single degree of freedom (SDOF) structural system to which a rigid rectangular partially filled liquid tank has been attached is considered. The SDOF structural system with the empty tank is first described with a mathematical model and this model is validated by performing decay experiments as well as experiments in which periodic excitations are applied to the system. The responses are accurately predicted by the model. The accuracy of these predictions allows us to study both experimentally and numerically, with weakly compressible SPH, the performance of the partially filled tank as a tuned liquid damper (TLD). The sloshing flows inside the tank comprise the onset of breaking waves which make the TLDs devices extremely difficult to model, especially for the potential flow multimodal approaches commonly used to simulate these sorts of coupled systems. In order to characterise the wave breaking effects on the response curves, tests have been performed with liquids of different viscosity, the increasing viscosity preventing the onset of breaking waves. The capabilities of SPH to treat this coupling problem are assessed and the results show that SPH is able to capture a substantial part of the physics involved in the addressed phenomena but further work remains still to be done relating to a more accurate treatment of the laminar viscosity and turbulence effects. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

Free surface flows simulations in Pelton turbines using an hybrid SPH-ALE method / Jean-Christophe Marongiu in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 40-49 Titre : Free surface flows simulations in Pelton turbines using an hybrid SPH-ALE method Titre original : Simulation des écoulements à surface libre dans les turbines Pelton par une méthode hybride SPH-ALE Type de document : texte imprimé Auteurs : Jean-Christophe Marongiu, Auteur ; Francis Leboeuf, Auteur ; Joelle Caro, Auteur Année de publication : 2010 Article en page(s) : pp. 40-49 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Hyperbolic  equations  Pelton  turbine  Preconditioning  Riemann  problem  SPH  ALE  Upwind  scheme  Water  impacts Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : An Arbitrary Lagrange Euler (ALE) description of fluid flows is used together with the meshless numerical method Smoothed Particle Hydrodynamics (SPH) to simulate free surface flows. The ALE description leads to an hybrid method that can be closely connected to the finite volume approach. It is then possible to adapt some common techniques like upwind schemes and preconditioning to remedy some of the well known drawbacks of SPH like stability and accuracy. An efficient boundary treatment based on a proper upwinding of fluid information at the boundary surface is settled. The resulting SPH-ALE numerical method is applied to simulate free surface flows encountered in Pelton turbines. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Free surface flows simulations in Pelton turbines using an hybrid SPH-ALE method = Simulation des écoulements à surface libre dans les turbines Pelton par une méthode hybride SPH-ALE [texte imprimé] / Jean-Christophe Marongiu, Auteur ; Francis Leboeuf, Auteur ; Joelle Caro, Auteur . - 2010 . - pp. 40-49. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 40-49 Mots-clés : Hyperbolic  equations  Pelton  turbine  Preconditioning  Riemann  problem  SPH  ALE  Upwind  scheme  Water  impacts Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : An Arbitrary Lagrange Euler (ALE) description of fluid flows is used together with the meshless numerical method Smoothed Particle Hydrodynamics (SPH) to simulate free surface flows. The ALE description leads to an hybrid method that can be closely connected to the finite volume approach. It is then possible to adapt some common techniques like upwind schemes and preconditioning to remedy some of the well known drawbacks of SPH like stability and accuracy. An efficient boundary treatment based on a proper upwinding of fluid information at the boundary surface is settled. The resulting SPH-ALE numerical method is applied to simulate free surface flows encountered in Pelton turbines. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

Application of weakly compressible and truly incompressible SPH to 3-D water collapse in waterworks / Eun-Sug Lee in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 50-60 Titre : Application of weakly compressible and truly incompressible SPH to 3-D water collapse in waterworks Titre original : Application de SPH faiblement compressible et vraiment incompressibles à l'écrassement 3D de l'eau sur des ouvrages hydrauliques Type de document : texte imprimé Auteurs : Eun-Sug Lee, Auteur ; Violeau, Damien, Auteur ; Réza Issa, Auteur Année de publication : 2010 Article en page(s) : pp. 50-60 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Dam-break  Lagrangian  methods  Numerical  modeling  Reservoir  Spillway  SPH Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Two algorithms of the SPH Lagrangian numerical method, the first weakly compressible, the second truly incompressible, are presented and applied to two free-surface three-dimensional flows. The first (schematic) case consists of a water column collapsing in a rectangular tank with a central rectangular obstacle, and allows the comparison and validation of both algorithms. It appears that the incompressible method is superior to predict the total strength experienced by the obstacle, while the weakly compressible method shows weaknesses under this criterion. The second application case, very close to an industrial study, represents a “ski-jump” spillway connecting the reservoir of a river dam to a valley with complex bottom shape. The global flow pattern is compared to laboratory observations from a physical model, leading to satisfactory conclusions which prove SPH has the potential to be a promising method for the design of complex waterworks. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Application of weakly compressible and truly incompressible SPH to 3-D water collapse in waterworks = Application de SPH faiblement compressible et vraiment incompressibles à l'écrassement 3D de l'eau sur des ouvrages hydrauliques [texte imprimé] / Eun-Sug Lee, Auteur ; Violeau, Damien, Auteur ; Réza Issa, Auteur . - 2010 . - pp. 50-60. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 50-60 Mots-clés : Dam-break  Lagrangian  methods  Numerical  modeling  Reservoir  Spillway  SPH Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Two algorithms of the SPH Lagrangian numerical method, the first weakly compressible, the second truly incompressible, are presented and applied to two free-surface three-dimensional flows. The first (schematic) case consists of a water column collapsing in a rectangular tank with a central rectangular obstacle, and allows the comparison and validation of both algorithms. It appears that the incompressible method is superior to predict the total strength experienced by the obstacle, while the weakly compressible method shows weaknesses under this criterion. The second application case, very close to an industrial study, represents a “ski-jump” spillway connecting the reservoir of a river dam to a valley with complex bottom shape. The global flow pattern is compared to laboratory observations from a physical model, leading to satisfactory conclusions which prove SPH has the potential to be a promising method for the design of complex waterworks. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

Hydrodynamics and fluid-structure interaction by coupled SPH-FE method / Paul H.L. Groenenboom in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 61-73 Titre : Hydrodynamics and fluid-structure interaction by coupled SPH-FE method Titre original : Hydrodynamique et interaction fluide-structure par la méthode couplée SPH-FE Type de document : texte imprimé Auteurs : Paul H.L. Groenenboom, Auteur ; Bruce K. Cartwright, Auteur Année de publication : 2010 Article en page(s) : pp. 61-73 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Finite  elements  Fluid-structure  interaction  Smoothed  particle  hydrodynamics  Waves Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In this contribution the coupling of the Smoothed Particle Hydrodynamics (SPH) method for fluid dynamics to Finite Elements (FE) for structures is discussed. The accuracy of the SPH method for hydrodynamics will be demonstrated by the case of a dam break in a container in which it will be made plausible that the experimentally observed free surface profile is influenced by a wet floor. The application of the coupled SPH-FE method to fluid-structure interaction is proven by the simulation of the drop of a flexible cylinder in water. A novel approach to generate free surface waves in an arbitrary domain and validation for second-order Stokes’ waves will be presented. Practical application of the methodology will be demonstrated by a study on waves inside flooded docks of an Amphibious Transport Ship and by the drop of a large canister into waves. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Hydrodynamics and fluid-structure interaction by coupled SPH-FE method = Hydrodynamique et interaction fluide-structure par la méthode couplée SPH-FE [texte imprimé] / Paul H.L. Groenenboom, Auteur ; Bruce K. Cartwright, Auteur . - 2010 . - pp. 61-73. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 61-73 Mots-clés : Finite  elements  Fluid-structure  interaction  Smoothed  particle  hydrodynamics  Waves Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In this contribution the coupling of the Smoothed Particle Hydrodynamics (SPH) method for fluid dynamics to Finite Elements (FE) for structures is discussed. The accuracy of the SPH method for hydrodynamics will be demonstrated by the case of a dam break in a container in which it will be made plausible that the experimentally observed free surface profile is influenced by a wet floor. The application of the coupled SPH-FE method to fluid-structure interaction is proven by the simulation of the drop of a flexible cylinder in water. A novel approach to generate free surface waves in an arbitrary domain and validation for second-order Stokes’ waves will be presented. Practical application of the methodology will be demonstrated by a study on waves inside flooded docks of an Amphibious Transport Ship and by the drop of a large canister into waves. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

SPH on GPU with CUDA / Alexis Hérault in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 74-79 Titre : SPH on GPU with CUDA Titre original : SPH sur GPU avec CUDA Type de document : texte imprimé Auteurs : Alexis Hérault, Auteur ; Giuseppe Bilotta, Auteur ; Robert A. Dalrymple, Auteur Année de publication : 2010 Article en page(s) : pp. 74-79 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : CUDA  Fluid  simulation  GPGPU  GPU  Particle  methods  Smoothed  particle  hydodynamics Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : A Smoothed Particle Hydrodynamics (SPH) method for free surface flows has been implemented on a graphical processing unit (GPU) using the Compute Unified Device Architecture (CUDA) developed by Nvidia, resulting in tremendous speed-ups. The entire SPH code, with its three main components: neighbor list construction, force computation, and integration of the equation of motion, is computed on the GPU, fully exploiting its computational power. The simulation speed achieved is one to two orders of magnitude faster than the equivalent CPU code. Example applications are shown for paddle-generated waves in a basin and a dam-break wave impact on a structure. GPU implementation of SPH permits high resolution SPH modeling in hours and days rather than weeks and months on inexpensive and readily available hardware. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] SPH on GPU with CUDA = SPH sur GPU avec CUDA [texte imprimé] / Alexis Hérault, Auteur ; Giuseppe Bilotta, Auteur ; Robert A. Dalrymple, Auteur . - 2010 . - pp. 74-79. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 74-79 Mots-clés : CUDA  Fluid  simulation  GPGPU  GPU  Particle  methods  Smoothed  particle  hydodynamics Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : A Smoothed Particle Hydrodynamics (SPH) method for free surface flows has been implemented on a graphical processing unit (GPU) using the Compute Unified Device Architecture (CUDA) developed by Nvidia, resulting in tremendous speed-ups. The entire SPH code, with its three main components: neighbor list construction, force computation, and integration of the equation of motion, is computed on the GPU, fully exploiting its computational power. The simulation speed achieved is one to two orders of magnitude faster than the equivalent CPU code. Example applications are shown for paddle-generated waves in a basin and a dam-break wave impact on a structure. GPU implementation of SPH permits high resolution SPH modeling in hours and days rather than weeks and months on inexpensive and readily available hardware. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

SPH modelling of water waves generated by submarine landslides / Tatiana Capone in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 80-84 Titre : SPH modelling of water waves generated by submarine landslides Type de document : texte imprimé Auteurs : Tatiana Capone, Auteur ; Andrea Panizzo, Auteur ; Joe J. Monagham, Auteur Année de publication : 2010 Article en page(s) : pp. 80-84 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Bingham  model  Numerical  simulation  Rheology  SPH  Submarine  landslides Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The present work introduces a numerical representation of the rheological non Newtonian Bingham model by means of the Smoothed Particle Hydrodynamics (SPH) approach. The model is first re-written using the SPH formalism. Then, it is tested using an annular viscometer test case. Finally, the generation of tsunami waves due to underwater landslide is faced, considering the experimental work of Rzadkiewicz et al. (1997). The implemented rheological SPH model is used to simulate the landslide deformation, and its interaction with water, thus simulating also the generation and propagation of surface tsunami waves. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] SPH modelling of water waves generated by submarine landslides [texte imprimé] / Tatiana Capone, Auteur ; Andrea Panizzo, Auteur ; Joe J. Monagham, Auteur . - 2010 . - pp. 80-84. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 80-84 Mots-clés : Bingham  model  Numerical  simulation  Rheology  SPH  Submarine  landslides Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The present work introduces a numerical representation of the rheological non Newtonian Bingham model by means of the Smoothed Particle Hydrodynamics (SPH) approach. The model is first re-written using the SPH formalism. Then, it is tested using an annular viscometer test case. Finally, the generation of tsunami waves due to underwater landslide is faced, considering the experimental work of Rzadkiewicz et al. (1997). The implemented rheological SPH model is used to simulate the landslide deformation, and its interaction with water, thus simulating also the generation and propagation of surface tsunami waves. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

SPHysics-FUNWAVE hybrid model for coastal wave propagation / Muthukumar Narayanaswamy in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 85-93 Titre : SPHysics-FUNWAVE hybrid model for coastal wave propagation Titre original : Modèle hybride SPHysics-FUNWAVE pour la propagation côtière des vagues Type de document : texte imprimé Auteurs : Muthukumar Narayanaswamy, Auteur ; Alejandro Jacobo Cabrera Crespo, Auteur ; Moncho Gomez-Gesteira, Auteur Année de publication : 2010 Article en page(s) : pp. 85-93 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Boussinesq  type  wave  propagation  model  Coupling  technique  FUNWAVE  Hybrid  model  Smoothed  particle  hydrodynamics  SPH  SPHysics Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : It is difficult to study the process of wave propagation from the deep ocean to the nearshore region using a single model due to the presence of multiple scales both in time and in space. Numerical models based on the Boussinesq equations are well known to accurately propagate waves from intermediate water depth to the nearshore region. Since they are 2D models, they are computationally efficient and can be applied to study wave transformations over large domains. Numerical models based on Smoothed Particle Hydrodynamics can inherently capture multiply connected free surfaces and hence can be naturally used to capture breaking free surfaces and estimate breaking induced runup and overtopping. Here, a hybrid model (SPHunwave) is developed combining the main advantages of a Boussinesq model (FUNWAVE) and a SPH model (SPHysics). The details of the coupling procedure along with preliminary validation tests are presented. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] SPHysics-FUNWAVE hybrid model for coastal wave propagation = Modèle hybride SPHysics-FUNWAVE pour la propagation côtière des vagues [texte imprimé] / Muthukumar Narayanaswamy, Auteur ; Alejandro Jacobo Cabrera Crespo, Auteur ; Moncho Gomez-Gesteira, Auteur . - 2010 . - pp. 85-93. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 85-93 Mots-clés : Boussinesq  type  wave  propagation  model  Coupling  technique  FUNWAVE  Hybrid  model  Smoothed  particle  hydrodynamics  SPH  SPHysics Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : It is difficult to study the process of wave propagation from the deep ocean to the nearshore region using a single model due to the presence of multiple scales both in time and in space. Numerical models based on the Boussinesq equations are well known to accurately propagate waves from intermediate water depth to the nearshore region. Since they are 2D models, they are computationally efficient and can be applied to study wave transformations over large domains. Numerical models based on Smoothed Particle Hydrodynamics can inherently capture multiply connected free surfaces and hence can be naturally used to capture breaking free surfaces and estimate breaking induced runup and overtopping. Here, a hybrid model (SPHunwave) is developed combining the main advantages of a Boussinesq model (FUNWAVE) and a SPH model (SPHysics). The details of the coupling procedure along with preliminary validation tests are presented. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

A study of violent sloshing wave impacts using an improved SPH method / Andrea Colagrossi in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 94-104 Titre : A study of violent sloshing wave impacts using an improved SPH method Titre original : Etude des impacts violents d'une onde oscillante par une méthode SPH améliorée Type de document : texte imprimé Auteurs : Andrea Colagrossi, Auteur ; Giuseppina Colicchio, Auteur ; Claudio Lugni Année de publication : 2010 Article en page(s) : pp. 94-104 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Flip-through  impact  Local  flow  features  MLS  integral  interpolators  Sloshing  flow  SPH Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The flip-through phenomenon has been observed in several conditions characterized by a steep wave approaching a vertical wall (Peregrine 2003). One of the cases where this phenomenon has been observed and studied experimentally is the sloshing in a partially filled tank. This case has been described in Lugni et al. (2006) and in Faltinsen and Timoka (2009). Those experiments detail the features of the flip-through dynamics with an ad hoc distributions of miniaturized pressure sensors and with the records of a fast video-camera. Here, the same flow conditions have been reproduced numerically with an improved SPH method (cSPH), i.e. with MLS integral interpolators (Fries and Matthies 2003). This allows to solve the Euler equations in the case of free surfaces impacting at a wall. The extremely intense local features of the phenomenon highlight the capabilities and limits of the numerical algorithms proposed. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] A study of violent sloshing wave impacts using an improved SPH method = Etude des impacts violents d'une onde oscillante par une méthode SPH améliorée [texte imprimé] / Andrea Colagrossi, Auteur ; Giuseppina Colicchio, Auteur ; Claudio Lugni . - 2010 . - pp. 94-104. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 94-104 Mots-clés : Flip-through  impact  Local  flow  features  MLS  integral  interpolators  Sloshing  flow  SPH Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The flip-through phenomenon has been observed in several conditions characterized by a steep wave approaching a vertical wall (Peregrine 2003). One of the cases where this phenomenon has been observed and studied experimentally is the sloshing in a partially filled tank. This case has been described in Lugni et al. (2006) and in Faltinsen and Timoka (2009). Those experiments detail the features of the flip-through dynamics with an ad hoc distributions of miniaturized pressure sensors and with the records of a fast video-camera. Here, the same flow conditions have been reproduced numerically with an improved SPH method (cSPH), i.e. with MLS integral interpolators (Fries and Matthies 2003). This allows to solve the Euler equations in the case of free surfaces impacting at a wall. The extremely intense local features of the phenomenon highlight the capabilities and limits of the numerical algorithms proposed. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

Comparison of incompressible and weakly-compressible SPH models for free-surface water flows / Jason P. Hughes in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 105-117 Titre : Comparison of incompressible and weakly-compressible SPH models for free-surface water flows Titre original : comparaison de modèles SPH incompressible et faiblement compressible pour les écoulements à surface libre Type de document : texte imprimé Auteurs : Jason P. Hughes, Auteur ; David I. Graham, Auteur Année de publication : 2010 Article en page(s) : pp. 105-117 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Incompressible  SPH  Weakly-compressible  SPH  Free-surface  Dam-break  Wave  impact Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Free surface flows represent a significant problem in computational fluid dynamics (CFD). The difficulties are multiplied when the free surfaces overturn or impact against solid surfaces, especially if air is entrapped in the process. Although many models capable of simulating such flows have been reported in the literature, particle-based methods such as SPH are arguably the most appealing conceptually and intuitively. In this paper, we model water flows with free surfaces.We assume that the flows are incompressible. There are many different implementations of SPH but there are two main approaches for modelling incompressible flows. In weakly-compressible SPH (WCSPH) computations of water flows, fluid pressure is related to particle density using a stiff equation of state. An alternative is incompressible SPH (ISPH). Here, a Poisson equation is solved to determine the pressure in an approach based upon the orthogonal decomposition method frequently used in grid-based methods. Recent work by Lee et al. (2008) has shown that, under certain circumstances, ISPH performs better than WCSPH for several flows. In this paper, we compare WCSPH and ISPH results for two standard dam-break problems and for regular water waves impacting against a vertical wall. Results are compared with experimental data where possible and show qualitative and quantitative agreement. In our version of WCSPH, MLS or Shephard filtering density ‘renormalisation’ methods are used and a variety of boundary condition formulations are tested and it is concluded that in the optimum configuration, WCSPH performs at least as well as ISPH, and in some respects clearly performs better. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Comparison of incompressible and weakly-compressible SPH models for free-surface water flows = comparaison de modèles SPH incompressible et faiblement compressible pour les écoulements à surface libre [texte imprimé] / Jason P. Hughes, Auteur ; David I. Graham, Auteur . - 2010 . - pp. 105-117. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 105-117 Mots-clés : Incompressible  SPH  Weakly-compressible  SPH  Free-surface  Dam-break  Wave  impact Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Free surface flows represent a significant problem in computational fluid dynamics (CFD). The difficulties are multiplied when the free surfaces overturn or impact against solid surfaces, especially if air is entrapped in the process. Although many models capable of simulating such flows have been reported in the literature, particle-based methods such as SPH are arguably the most appealing conceptually and intuitively. In this paper, we model water flows with free surfaces.We assume that the flows are incompressible. There are many different implementations of SPH but there are two main approaches for modelling incompressible flows. In weakly-compressible SPH (WCSPH) computations of water flows, fluid pressure is related to particle density using a stiff equation of state. An alternative is incompressible SPH (ISPH). Here, a Poisson equation is solved to determine the pressure in an approach based upon the orthogonal decomposition method frequently used in grid-based methods. Recent work by Lee et al. (2008) has shown that, under certain circumstances, ISPH performs better than WCSPH for several flows. In this paper, we compare WCSPH and ISPH results for two standard dam-break problems and for regular water waves impacting against a vertical wall. Results are compared with experimental data where possible and show qualitative and quantitative agreement. In our version of WCSPH, MLS or Shephard filtering density ‘renormalisation’ methods are used and a variety of boundary condition formulations are tested and it is concluded that in the optimum configuration, WCSPH performs at least as well as ISPH, and in some respects clearly performs better. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

SPH modeling of shallow-water coastal flows / Mathieu de Leffe in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 118-125 Titre : SPH modeling of shallow-water coastal flows Titre original : Modélisation SPH d'écoulements côtiers en eau peu profonde Type de document : texte imprimé Auteurs : Mathieu de Leffe, Auteur ; David le Touzé, Auteur ; Bertrand Alessandrini, Auteur Année de publication : 2010 Article en page(s) : pp. 118-125 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Coastal  area  flooding  Coastal  engineering  Shallow-water  flow  Smoothed  particle  hydrodynamics  Tsunami Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In the present paper, a Smoothed Particle Hydrodynamics (SPH) modeling of the shallow water equations is presented. The objective of this modeling is to perform flooding simulations involving complex bathymetries of sea bottom and dry land. The formulation is first detailed. Its implementation is then described, including specific procedures making possible to follow the expansion of the fluid domain during flooding simulations. An anisotropic kernel with variable smoothing length is especially used, as well as a periodic redistribution of the particles.A number of validation tests are performed. The model results are first checked on the case of a dam break on a flat dry bottom in one and two dimensions. Then more complex two-dimensional cases are simulated and compared to other models and experiments, e.g. a dam break flooding a slope of complex shape, and a solitary wave running up an island. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] SPH modeling of shallow-water coastal flows = Modélisation SPH d'écoulements côtiers en eau peu profonde [texte imprimé] / Mathieu de Leffe, Auteur ; David le Touzé, Auteur ; Bertrand Alessandrini, Auteur . - 2010 . - pp. 118-125. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 118-125 Mots-clés : Coastal  area  flooding  Coastal  engineering  Shallow-water  flow  Smoothed  particle  hydrodynamics  Tsunami Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : In the present paper, a Smoothed Particle Hydrodynamics (SPH) modeling of the shallow water equations is presented. The objective of this modeling is to perform flooding simulations involving complex bathymetries of sea bottom and dry land. The formulation is first detailed. Its implementation is then described, including specific procedures making possible to follow the expansion of the fluid domain during flooding simulations. An anisotropic kernel with variable smoothing length is especially used, as well as a periodic redistribution of the particles.A number of validation tests are performed. The model results are first checked on the case of a dam break on a flat dry bottom in one and two dimensions. Then more complex two-dimensional cases are simulated and compared to other models and experiments, e.g. a dam break flooding a slope of complex shape, and a solitary wave running up an island. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

SPH high-performance computing simulations of rigid solids impacting the free-surface of water / Pierre Maruzewski in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 126-134 Titre : SPH high-performance computing simulations of rigid solids impacting the free-surface of water Titre original : Calcul haute performance de l'impact de corps solides sur la surface libre de l'eau par la méthode SPH Type de document : texte imprimé Auteurs : Pierre Maruzewski, Auteur ; David le Touzé, Auteur ; Guillaume Oger, Auteur Année de publication : 2010 Article en page(s) : pp. 126-134 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Free-surface  flows  High  performance  computing  Hydrodynamic  impact  Parallelization  Scalability  Smoothed  particle  hydrodynamics  Water  entry Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Numerical simulations of water entries based on a three-dimensional parallelized Smoothed Particle Hydrodynamics (SPH) model developed by Ecole Centrale Nantes are presented. The aim of the paper is to show how such SPH simulations of complex 3D problems involving a free surface can be performed on a super computer like the IBM Blue Gene/L with 8,192 cores of Ecole polytechnique fédérale de Lausanne. The present paper thus presents the different techniques which had to be included into the SPH model to make possible such simulations. Memory handling, in particular, is a quite subtle issue because of constraints due to the use of a variable-h scheme. These improvements made possible the simulation of test cases involving hundreds of million particles computed by using thousands of cores. Speedup and efficiency of these parallel calculations are studied. The model capabilities are illustrated in the paper for two water entry problems, firstly, on a simple test case involving a sphere impacting the free surface at high velocity; and secondly, on a complex 3D geometry involving a ship hull impacting the free surface in forced motion. Sensitivity to spatial resolution is investigated as well in the case of the sphere water entry, and the flow analysis is performed by comparing both experimental and theoretical reference results. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] SPH high-performance computing simulations of rigid solids impacting the free-surface of water = Calcul haute performance de l'impact de corps solides sur la surface libre de l'eau par la méthode SPH [texte imprimé] / Pierre Maruzewski, Auteur ; David le Touzé, Auteur ; Guillaume Oger, Auteur . - 2010 . - pp. 126-134. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 126-134 Mots-clés : Free-surface  flows  High  performance  computing  Hydrodynamic  impact  Parallelization  Scalability  Smoothed  particle  hydrodynamics  Water  entry Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Numerical simulations of water entries based on a three-dimensional parallelized Smoothed Particle Hydrodynamics (SPH) model developed by Ecole Centrale Nantes are presented. The aim of the paper is to show how such SPH simulations of complex 3D problems involving a free surface can be performed on a super computer like the IBM Blue Gene/L with 8,192 cores of Ecole polytechnique fédérale de Lausanne. The present paper thus presents the different techniques which had to be included into the SPH model to make possible such simulations. Memory handling, in particular, is a quite subtle issue because of constraints due to the use of a variable-h scheme. These improvements made possible the simulation of test cases involving hundreds of million particles computed by using thousands of cores. Speedup and efficiency of these parallel calculations are studied. The model capabilities are illustrated in the paper for two water entry problems, firstly, on a simple test case involving a sphere impacting the free surface at high velocity; and secondly, on a complex 3D geometry involving a ship hull impacting the free surface in forced motion. Sensitivity to spatial resolution is investigated as well in the case of the sphere water entry, and the flow analysis is performed by comparing both experimental and theoretical reference results. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

Simulation of caisson breakwater movement using 2-D SPH / Benedict D. Rogers in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 135-141 Titre : Simulation of caisson breakwater movement using 2-D SPH Titre original : Simulation du mouvement d'un caisson de brise-lames avec SPH 2D Type de document : texte imprimé Auteurs : Benedict D. Rogers, Auteur ; Robert A. Dalrymple, Auteur ; Peter K. Stansby, Auteur Année de publication : 2010 Article en page(s) : pp. 135-141 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Caisson  breakwater  Displacement  Impact  forces  Periodic  waves  Smoothed  particle  hydrodynamics Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Smoothed Particle Hydrodynamics (SPH) is used to simulate the movement of a caisson breakwater in the surf zone. The open-source code SPHysics is used with a Riemann solver-based formulation. The friction force between the moving caisson and the bed is modelled with a transition from static to dynamic friction force. Results are presented for two-dimensional simulations and compared with experiments for the movement of a caisson breakwater under the forcing of periodic waves. Promising agreement with experimental data is obtained for the displacement and the horizontal forces on the caisson. It is demonstrated that the peak impact forces are better captured using finer resolution and that a Riemann solver-based formulation produces a better agreement with experiment for the predicted caisson displacement than conventional SPH. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Simulation of caisson breakwater movement using 2-D SPH = Simulation du mouvement d'un caisson de brise-lames avec SPH 2D [texte imprimé] / Benedict D. Rogers, Auteur ; Robert A. Dalrymple, Auteur ; Peter K. Stansby, Auteur . - 2010 . - pp. 135-141. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 135-141 Mots-clés : Caisson  breakwater  Displacement  Impact  forces  Periodic  waves  Smoothed  particle  hydrodynamics Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : Smoothed Particle Hydrodynamics (SPH) is used to simulate the movement of a caisson breakwater in the surf zone. The open-source code SPHysics is used with a Riemann solver-based formulation. The friction force between the moving caisson and the bed is modelled with a transition from static to dynamic friction force. Results are presented for two-dimensional simulations and compared with experiments for the movement of a caisson breakwater under the forcing of periodic waves. Promising agreement with experimental data is obtained for the displacement and the horizontal forces on the caisson. It is demonstrated that the peak impact forces are better captured using finer resolution and that a Riemann solver-based formulation produces a better agreement with experiment for the predicted caisson displacement than conventional SPH. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

Smoothed particle hydrodynamics model applied to hydraulic structures: a hydraulic jump test case / David Lopez in Journal of hydraulic research, Vol. 48 N° spécial (2010) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 142-158 Titre : Smoothed particle hydrodynamics model applied to hydraulic structures: a hydraulic jump test case Titre original : Modèle particulaire SPH appliqué aux ouvrages hydrauliques: un cas test de ressaut hydraulique Type de document : texte imprimé Auteurs : David Lopez, Auteur ; Roberto Marivela, Auteur ; Luis Garrote, Auteur Année de publication : 2010 Article en page(s) : pp. 142-158 Note générale : Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) Mots-clés : Free  surface  flow  Hydraulic  jump  SPH  Turbulence  Viscosity Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The capability of Smoothed Particle Hydrodynamics (SPH) to reproduce a mobile hydraulic jump was investigated.A similar case was used to generate different upstream Froude numbers to obtain several jump shapes. A physical model was then constructed in a test flume to check the SPH outcomes. The results showed good agreement for Froude numbers <5. Higher Froude numbers require more sophisticated turbulence closure models to obtain better results. Good outcomes can be achieved with k-ε models, but the computational cost is higher than for basic SPH. Instead, a simple method was implemented to increase the viscosity in areas of higher vorticity. In this case, the main difference is related to the dependence of the viscosity on the vorticity. This approach yielded better adjustment. Finally, it was found that SPH provides correct estimates of the average pressures at the boundaries, but exhibits large dispersion for instantaneous water height values. This problem was considerably attenuated by introduction of a turbulence model. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com [article] Smoothed particle hydrodynamics model applied to hydraulic structures: a hydraulic jump test case = Modèle particulaire SPH appliqué aux ouvrages hydrauliques: un cas test de ressaut hydraulique [texte imprimé] / David Lopez, Auteur ; Roberto Marivela, Auteur ; Luis Garrote, Auteur . - 2010 . - pp. 142-158. Hydraulique Résumés en Anglais et Français Langues : Anglais (eng) in Journal of hydraulic research > Vol. 48 N° spécial (2010) . - pp. 142-158 Mots-clés : Free  surface  flow  Hydraulic  jump  SPH  Turbulence  Viscosity Index. décimale : 627 Ingénierie des cours d'eau naturels, des ports, des rades et des cotes. Installations de navigation, de dragage, de récupération et de sauvetage. Barrages et centrales électriques hydrauliques Résumé : The capability of Smoothed Particle Hydrodynamics (SPH) to reproduce a mobile hydraulic jump was investigated.A similar case was used to generate different upstream Froude numbers to obtain several jump shapes. A physical model was then constructed in a test flume to check the SPH outcomes. The results showed good agreement for Froude numbers <5. Higher Froude numbers require more sophisticated turbulence closure models to obtain better results. Good outcomes can be achieved with k-ε models, but the computational cost is higher than for basic SPH. Instead, a simple method was implemented to increase the viscosity in areas of higher vorticity. In this case, the main difference is related to the dependence of the viscosity on the vorticity. This approach yielded better adjustment. Finally, it was found that SPH provides correct estimates of the average pressures at the boundaries, but exhibits large dispersion for instantaneous water height values. This problem was considerably attenuated by introduction of a turbulence model. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.journalhydraulicresearch.com

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