Article (Scientific journals)
Numerical investigation of flow patterns in rectangular shallow reservoirs
Dufresne, Matthieu; Dewals, Benjamin; Erpicum, Sébastien et al.
2011In Engineering Applications of Computational Fluid Mechanics, 5 (2), p. 247-258
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Keywords :
shallow reservoirs; flow instability; sedimentation
Abstract :
[en] The present work gives findings profitable for the person who wants to evaluate an asymmetric detach-reattach flow. In this study, the capability of a two-dimensional shallow-water numerical model to simulate the symmetric and asymmetric flows that can take place in rectangular shallow reservoirs varying the lateral expansion ratio and the dimensionless length is investigated. For a large lateral expansion ratio, the use of two protocols of simulation highlighted a high sensitivity of the simulated flow pattern to the initial condition. Comparison between simulated results and experimental data showed a good agreement for the critical shape parameter (combination of the lateral expansion ratio and the dimensionless length) between symmetric and asymmetric flows. A good agreement was also found for the value of the shorter reattachment length of asymmetric flows. For small lateral expansion ratios, the agreement was not so good. The model was used for even larger lateral expansion ratios in order to numerically extend the experimental dataset. This predictive work showed that the shape parameter, whose expression was only based on experiments carried out for small lateral expansion ratios, was also relevant for larger values. Moreover, the predicted values of the shorter reattachment length were also consistent with a regression only based on experimental results.
Research center :
Aquapôle - ULiège
Disciplines :
Civil engineering
Author, co-author :
Dufresne, Matthieu
Dewals, Benjamin  ;  Université de Liège - ULiège > Département Argenco : Secteur MS2F > Hydrodynamique appl. et constructions hydrauliques (HACH)
Erpicum, Sébastien  ;  Université de Liège - ULiège > Services généraux (Faculté des sciences appliquées) > Scientifiques attachés au Doyen (Sc.appliquées)
Archambeau, Pierre  ;  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)
Language :
English
Title :
Numerical investigation of flow patterns in rectangular shallow reservoirs
Publication date :
May 2011
Journal title :
Engineering Applications of Computational Fluid Mechanics
ISSN :
1994-2060
eISSN :
1997-003X
Publisher :
Hong Kong Polytechnic University, Hong Kong, China
Volume :
5
Issue :
2
Pages :
247-258
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
Available on ORBi :
since 10 January 2011

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