XIONG, Yong Liang; BRUNEAU, Charles-Henri; KELLAY, Hamid

doi:10.1209/0295-5075/95/64003

Métadonnées

Afficher la notice complète

Licence d’utilisation du document

XIONG, Yong Liang
Institut de Mathématiques de Bordeaux [IMB]
Modélisation, contrôle et calcul [MC2]

BRUNEAU, Charles-Henri
Institut de Mathématiques de Bordeaux [IMB]
Modélisation, contrôle et calcul [MC2]

KELLAY, Hamid
Laboratoire Ondes et Matière d'Aquitaine [LOMA]

Langue

Article de revue

Ce document a été publié dans

EPL - Europhysics Letters. 2011, vol. 95, n° 6

European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing

Résumé en anglais

We here use direct numerical simulations to describe the flow of a viscoelastic fluid, modeled using the so-called Oldroyd B model, around a cylinder in two dimensions. A wide range of flow parameters is covered in these simulations allowing to draw definitive conclusions as to the effect of viscoelasticity on such a flow situation. Both drag enhancement and drag reduction are observed and a phase diagram is proposed in the parameter space Reynolds number vs. Weissenberg number. While only drag enhancement is observed below a Reynolds number of 40, both drag enhancement and drag reduction are observed for higher Reynolds numbers indicating that drag reduction is a feature associated with the shedding of vortices behind the cylinder. An interesting observation accompanies the onset of drag enhancement in the vortex-shedding regime: the shedding is suppressed.< Réduire

Métadonnées

Licence d’utilisation du document

Direct numerical simulation of 2D channel flows in the presence of polymers

Langue

Ce document a été publié dans

Résumé en anglais

DOI

Origine

Unités de recherche