Elastic Turbulence in Shear Banding Wormlike Micelles

被引：77

作者：

Fardin, M. A. ^{[1
,2
]}

Lopez, D. ^{[1
]}

Croso, J. ^{[1
]}

Gregoire, G. ^{[1
]}

Cardoso, O. ^{[1
]}

McKinley, G. H. ^{[2
]}

Lerouge, S. ^{[1
]}

机构：

[1] Univ Paris Diderot, Lab Mat & Syst Complexes, CNRS, UMR 7057, 10 Rue Alice Domon & Leonie Duquet, F-75205 Paris 13, France

[2] MIT, Dept Mech Engn, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 104卷 / 17期

关键词：

DYNAMICS; INSTABILITIES; FLOW; RHEOLOGY;

D O I：

10.1103/PhysRevLett.104.178303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the dynamics of the Taylor-Couette flow of shear banding wormlike micelles. We focus on the high shear rate branch of the flow curve and show that for sufficiently high Weissenberg numbers, this branch becomes unstable. This instability is strongly subcritical and is associated with a shear stress jump. We find that this increase of the flow resistance is related to the nucleation of turbulence. The flow pattern shows similarities with the elastic turbulence, so far only observed for polymer solutions. The unstable character of this branch led us to propose a scenario that could account for the recent observations of Taylor-like vortices during the shear banding flow of wormlike micelles.

引用

页数：4

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