Similarity solution of dam-break flow on horizontal frictionless channel / Yunliang Chen 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. 384-387 Titre : Similarity solution of dam-break flow on horizontal frictionless channel Type de document : texte imprimé Auteurs : Yunliang Chen, Auteur ; Chao Wu, Auteur ; Bo Wang, Auteur Année de publication : 2011 Article en page(s) : pp. 384-387 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Dam-break flow Scale transformation Shock wave Similarity solution Triangular cross-section 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 : Compared with the Blasius similarity approach for the boundary layer theory, a similarity solution for dam-break flow on a horizontal channel with zero friction is considered by the theory of scale transformation. Time and space coordinates as the two independent variables are substituted by one independent dimensionless similarity variable, so that the governing partial differential equations can be transformed into a system of ordinary differential equations. The analytical similarity dam-break solution on a dry bed and the multinomial algebraic equation of shock wave on a wet bed are proposed for a prismatic channel of triangular cross-section. Basing on the similarity characteristic of dam-break flow, the flood propagation at any time and space can be described by a dimensionless curve. The dimensionless positions of strong and weak discontinuities for dam-break shock wave do not change with time, and the description of the dam-break hydrograph is therefore simplified. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.571537 [article] Similarity solution of dam-break flow on horizontal frictionless channel [texte imprimé] / Yunliang Chen, Auteur ; Chao Wu, Auteur ; Bo Wang, Auteur . - 2011 . - pp. 384-387. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 49 N° 3 (Mai/Juin 2011) . - pp. 384-387 Mots-clés : Dam-break flow Scale transformation Shock wave Similarity solution Triangular cross-section 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 : Compared with the Blasius similarity approach for the boundary layer theory, a similarity solution for dam-break flow on a horizontal channel with zero friction is considered by the theory of scale transformation. Time and space coordinates as the two independent variables are substituted by one independent dimensionless similarity variable, so that the governing partial differential equations can be transformed into a system of ordinary differential equations. The analytical similarity dam-break solution on a dry bed and the multinomial algebraic equation of shock wave on a wet bed are proposed for a prismatic channel of triangular cross-section. Basing on the similarity characteristic of dam-break flow, the flood propagation at any time and space can be described by a dimensionless curve. The dimensionless positions of strong and weak discontinuities for dam-break shock wave do not change with time, and the description of the dam-break hydrograph is therefore simplified. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.571537

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