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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