Taylor-like vortices in shear-banding flow of giant micelles

Using flow visualizations in Couette geometry, we demonstrate the existence of Taylor-like vortices in the shear-banding flow of a giant micelles system. We show that vortices stacked along the vorticity direction develop concomitantly with interfacial undulations. These cellular structures are main...

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Published inPhysical review letters Vol. 103; no. 2; p. 028302
Main Authors Fardin, M A, Lasne, B, Cardoso, O, Grégoire, G, Argentina, M, Decruppe, J P, Lerouge, S
Format Journal Article
LanguageEnglish
Published United States 10.07.2009
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Summary:Using flow visualizations in Couette geometry, we demonstrate the existence of Taylor-like vortices in the shear-banding flow of a giant micelles system. We show that vortices stacked along the vorticity direction develop concomitantly with interfacial undulations. These cellular structures are mainly localized in the induced band and their dynamics is fully correlated with that of the interface. As the control parameter increases, we observe a transition from a steady vortex flow to a state where pairs of vortices are continuously created and destroyed. Normal stress effects are discussed as potential mechanisms driving the three-dimensional flow.
ISSN:0031-9007
DOI:10.1103/PhysRevLett.103.028302