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Quasi 2D-numerical model of aerated flow over stepped chutes
André, Stéphanie; Dewals, Benjamin; Pirotton, Michel et al.
2003In Proc. 30th IAHR Congress
Peer reviewed
 

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Keywords :
Stepped-chutes; Self-aeration; Uneven vertical velocity distribution; Free surface waves; Finite volume; Depth-average; Navier-Stokes equations
Abstract :
[en] Aerated flow over stepped chutes is principally studied on laboratory models. Consequently, the obtained design relations have a limited field of application. In order to propose a more general description of the flow, a quasi-2D numerical model is developed. The fluid is considered as an air-water mixture governed by the shallow-water equations. Moreover, a transport equation for air concentration represents the self-aeration of the flow and a coefficient of uneven vertical velocity distribution integrates indirectly the turbulent structures. The paper includes a brief description of the flow behaviour, the quasi-2D model equations, and a comparison of the numerical results with the measured flow characteristics in a 30° stepped flume.
Disciplines :
Civil engineering
Author, co-author :
André, Stéphanie
Dewals, Benjamin  ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Pirotton, Michel ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Schleiss, Anton
Language :
English
Title :
Quasi 2D-numerical model of aerated flow over stepped chutes
Publication date :
2003
Event name :
30th IAHR Congress
Event place :
Thessaloniki, Greece
Audience :
International
Main work title :
Proc. 30th IAHR Congress
Publisher :
IAHR
Edition :
volume D
Pages :
671-678
Peer reviewed :
Peer reviewed
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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since 02 December 2008

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