[article] 
inJournal of hydraulic research > Vol. 50 N° 3 (Mai/Juin 2012) . - pp. 312-319

Titre :	Three-phase bi-layer model for simulating mixed flows
Type de document :	texte imprimé
Auteurs :	François Kerger, Auteur ; Pierre Archambeau, Auteur ; Benjamin J. Dewals, Auteur
Année de publication :	2012
Article en page(s) :	pp. 312-319
Note générale :	Hydraulique
Langues :	Anglais (eng)
Mots-clés :	Air entrapment entrainment Air–water flow Drift-flux model Multiphase
Résumé :	Mixed flows characterized by a simultaneous occurrence of free surface and pressurized flows are often encountered in hydraulic engineering. Numerous researches have been dedicated to unify the mathematical description of both flows. Herein, shock-capturing models succeed in giving a unique set of equations. However, no method accounts for both air-entrapment and air-entrainment. This study proposes an original model to simulate air–water interactions in mixed flows. The new approach relies on the area-integration of a three-phase model over two layers. The applicability of this free surface model is extended to pressurized flows by a modified pressure term accounting for the dispersed air. The derived modelling system WOLF IMPack is then validated. The code successfully simulates open channel flows, mixed flows and water hammer in a unified framework, including air–water interactions, in structures like the drainage network.
ISSN :	0022-1686
En ligne :	http://www.tandfonline.com/doi/full/10.1080/00221686.2012.684454

[article] Three-phase bi-layer model for simulating mixed flows [texte imprimé] / François Kerger, Auteur ; Pierre Archambeau, Auteur ; Benjamin J. Dewals, Auteur . - 2012 . - pp. 312-319.
Hydraulique
Langues : Anglais (eng)
in Journal of hydraulic research > Vol. 50 N° 3 (Mai/Juin 2012) . - pp. 312-319

Mots-clés :	Air entrapment entrainment Air–water flow Drift-flux model Multiphase
Résumé :	Mixed flows characterized by a simultaneous occurrence of free surface and pressurized flows are often encountered in hydraulic engineering. Numerous researches have been dedicated to unify the mathematical description of both flows. Herein, shock-capturing models succeed in giving a unique set of equations. However, no method accounts for both air-entrapment and air-entrainment. This study proposes an original model to simulate air–water interactions in mixed flows. The new approach relies on the area-integration of a three-phase model over two layers. The applicability of this free surface model is extended to pressurized flows by a modified pressure term accounting for the dispersed air. The derived modelling system WOLF IMPack is then validated. The code successfully simulates open channel flows, mixed flows and water hammer in a unified framework, including air–water interactions, in structures like the drainage network.
ISSN :	0022-1686
En ligne :	http://www.tandfonline.com/doi/full/10.1080/00221686.2012.684454