Drag enhancement and drag reduction in viscoelastic fluid flow around a cylinder

Abstract : 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.
Type de document :
Article dans une revue
EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2010, 91 (6), 〈10.1209/0295-5075/91/64001〉
Liste complète des métadonnées

Littérature citée [5 références]  Voir  Masquer  Télécharger

https://hal.inria.fr/inria-00546810
Contributeur : Charles-Henri Bruneau <>
Soumis le : mercredi 20 décembre 2017 - 12:33:09
Dernière modification le : lundi 22 janvier 2018 - 11:02:05

Fichier

XiongEPL2010_Postprint.pdf
Fichiers produits par l'(les) auteur(s)

Licence


Distributed under a Creative Commons Paternité - Partage selon les Conditions Initiales 4.0 International License

Identifiants

Collections

IMB | LOMA

Citation

Yong Liang Xiong, Charles-Henri Bruneau, Hamid Kellay. Drag enhancement and drag reduction in viscoelastic fluid flow around a cylinder. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2010, 91 (6), 〈10.1209/0295-5075/91/64001〉. 〈inria-00546810〉

Partager

Métriques

Consultations de la notice

105

Téléchargements de fichiers

20