De Cuyper, Anaïs
Promoteur(s) : Dewals, Benjamin ; Erpicum, Sébastien
Date de soutenance : 2015 • URL permanente : http://hdl.handle.net/2268.2/2367
Détails
Titre : | Hydrodynamic instabilities in shallow reservoirs |
Auteur : | De Cuyper, Anaïs |
Date de soutenance : | 2015 |
Promoteur(s) : | Dewals, Benjamin
Erpicum, Sébastien |
Membre(s) du jury : | Pirotton, Michel
Andrianne, Thomas |
Langue : | Anglais |
Nombre de pages : | 85 |
Discipline(s) : | Ingénierie, informatique & technologie > Ingénierie civile |
Institution(s) : | Université de Liège, Liège, Belgique |
Diplôme : | Master en ingénieur civil des constructions, à finalité |
Faculté : | Mémoires de la Faculté des Sciences appliquées |
Résumé
[fr] This Master's thesis is devoted to the study of ?ows in shallow reservoirs. The main
purpose is to enhance the knowledge of the di?erent ?ow regimes in order to improve the
prediction of deposits and thus the reservoir management. To do this, two points are covered
in this thesis: the in?uence of geometric parameters (length and width of the reservoir) on
main characteristics of meandering ?ows and the applicability of thermodynamic principles
to predict the ?ow regime in reservoirs. Concerning the ?rst point, three experiments were
performed in a shallow horizontal ?ume, the ?rst experiment being used to validate the
experimental protocol. For each experiment, the surface velocity ?elds were measured by
Large-Scale Particle Image Velocimetry (LSPIV) and the main characteristics of measured
meandering ?ows such as the characteristic lengths or the Strouhal number were obtained
using a Proper Orthogonal Decomposition (POD). Finally, it was shown that for a given
?ow regime, the characteristics of the ?ow do not depend on the geometry but only on
the shallowness of the reservoir. In the second part, two analytical models were developed
to model symmetric and asymmetric ?ows. Mass and momentum balance equations were
established and the power developed by the shear force was determined for each model and
compared. Based on this comparison, it was shown that the principle of maximum power
could be used to determine the ?ow regime in reservoirs.
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