A 2D shallow flow model for practical dam-break simulations / Yueling Wang in Journal of hydraulic research, Vol. 49 N° 3 (Mai/Juin 2011)  

Public ISBD [article]  inJournal of hydraulic research > Vol. 49 N° 3 (Mai/Juin 2011) . - pp. 307-316 Titre : A 2D shallow flow model for practical dam-break simulations Type de document : texte imprimé Auteurs : Yueling Wang, Auteur ; Liang, Qiuhua, Auteur ; Kesserwani, Georges, Auteur Année de publication : 2011 Article en page(s) : pp. 307-316 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Dam break Friction term Godunov-type method Shallow-water equation Well-balanced scheme Wetting and drying 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 : Dam-break flows usually occur in domains with complex geometric and topographic features and involve abrupt flow patterns. A dam-break model must therefore be able to effectively handle different flow types including transcritical flows or hydraulic jumps, deal with complex domain topography, capture repeating wet–dry interface and represent high roughness values in the floodplain. Herein, all of these objectives are achieved by extending a recent one-dimensional finite volume Godunov-type model into two dimensions for solving the shallow-water equations. While doing so, a much simplified condition to maintain well-balanced solutions around a wet–dry front is proposed and a two-dimensional friction source term discretization is derived under a suitable stability condition in relation to practical simulations. The two-dimensional model is successfully validated against three analytical benchmark tests and then assessed for predicting realistic dam-break flood events. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.566248 [article] A 2D shallow flow model for practical dam-break simulations [texte imprimé] / Yueling Wang, Auteur ; Liang, Qiuhua, Auteur ; Kesserwani, Georges, Auteur . - 2011 . - pp. 307-316. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 49 N° 3 (Mai/Juin 2011) . - pp. 307-316 Mots-clés : Dam break Friction term Godunov-type method Shallow-water equation Well-balanced scheme Wetting and drying 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 : Dam-break flows usually occur in domains with complex geometric and topographic features and involve abrupt flow patterns. A dam-break model must therefore be able to effectively handle different flow types including transcritical flows or hydraulic jumps, deal with complex domain topography, capture repeating wet–dry interface and represent high roughness values in the floodplain. Herein, all of these objectives are achieved by extending a recent one-dimensional finite volume Godunov-type model into two dimensions for solving the shallow-water equations. While doing so, a much simplified condition to maintain well-balanced solutions around a wet–dry front is proposed and a two-dimensional friction source term discretization is derived under a suitable stability condition in relation to practical simulations. The two-dimensional model is successfully validated against three analytical benchmark tests and then assessed for predicting realistic dam-break flood events. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.566248

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