Transient Shear Banding in a Simple Yield Stress Fluid

Abstract : We report a large set of experimental data which demonstrates that a simple yield stress fluid, i.e. which does not present aging or thixotropy, exhibits transient shear banding before reaching a steady state characterized by a homogeneous, linear velocity profile. The duration of the transient regime decreases as a power law with the applied shear rate $\dot\gamma$. This power law behavior, observed here in carbopol dispersions, does not depend on the gap width and on the boundary conditions for a given sample preparation. For $\dot\gamma\lesssim 0.1$~s$^{-1}$, heterogeneous flows could be observed for as long as 10$^5$~s. These local dynamics account for the ultraslow stress relaxation observed at low shear rates.
Type de document :
Article dans une revue
Physical Review Letters, American Physical Society, 2010, 104 (20), pp.208301. 〈10.1103/PhysRevLett.104.208301〉
Liste complète des métadonnées

Littérature citée [22 références]  Voir  Masquer  Télécharger

https://hal-ens-lyon.archives-ouvertes.fr/ensl-00459317
Contributeur : Sébastien Manneville <>
Soumis le : mardi 23 février 2010 - 16:13:48
Dernière modification le : jeudi 19 avril 2018 - 14:54:03
Document(s) archivé(s) le : vendredi 18 juin 2010 - 21:46:53

Fichiers

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

Identifiants

Collections

Citation

Thibaut Divoux, David Tamarii, Catherine Barentin, Sébastien Manneville. Transient Shear Banding in a Simple Yield Stress Fluid. Physical Review Letters, American Physical Society, 2010, 104 (20), pp.208301. 〈10.1103/PhysRevLett.104.208301〉. 〈ensl-00459317〉

Partager

Métriques

Consultations de la notice

191

Téléchargements de fichiers

159