Elastic Turbulence in Shear Banding Wormlike Micelles
Author(s)Fardin, Marc-Antoine; Lopez, D.; Croso, J.; Gregoire, G.; Cardoso, O.; McKinley, Gareth H.; Lerouge, S.; ... Show more Show less
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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.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
Physical Review Letters
American Physical Society
Fardin, M.A. et al. "Elastic Turbulence in Shear Banding Wormlike Micelles." Physical Review Letters 104.17 (2010): 178303. © 2010 The American Physical Society.
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