Recirculation cells in a wide channel

Abstract : Secondary flow cells are commonly observed in straight laboratory channels, where they are often associated with duct corners. Here, we present velocity measurements acquired with an acoustic Doppler current profiler in a straight reach of the Seine river (France). We show that a remarkably regular series of stationary flow cells spans across the entire channel. They are arranged in pairs of counter-rotating vortices aligned with the primary flow. Their existence away from the river banks contradicts the usual interpretation of these secondary flow structures, which invokes the influence of boundaries. Based on these measurements, we use a depth-averaged model to evaluate the momentum transfer by these structures, and find that it is comparable with the classical turbulent transfer.
Type de document :
Article dans une revue
Physics of Fluids, American Institute of Physics, 2014, 26 (1), 17 p. 〈10.1063/1.4862442〉
Liste complète des métadonnées

Littérature citée [35 références]  Voir  Masquer  Télécharger

https://hal-univ-diderot.archives-ouvertes.fr/hal-01001919
Contributeur : Hugo Chauvet <>
Soumis le : jeudi 5 juin 2014 - 11:26:26
Dernière modification le : jeudi 11 janvier 2018 - 06:25:48
Document(s) archivé(s) le : vendredi 5 septembre 2014 - 11:30:34

Fichier

chauvet_pof_2014.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

INSU | UPMC | AFRIQ | IPGP | USPC

Citation

Hugo Chauvet, Olivier Devauchelle, François Métivier, Eric Lajeunesse, Angela Limare. Recirculation cells in a wide channel. Physics of Fluids, American Institute of Physics, 2014, 26 (1), 17 p. 〈10.1063/1.4862442〉. 〈hal-01001919〉

Partager

Métriques

Consultations de la notice

219

Téléchargements de fichiers

271