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2006.193: Spatio-temporal oscillations and rheochaos in a simple model of shear banding

2006.193: S.M. Fielding and P.D. Olmsted (2004) Spatio-temporal oscillations and rheochaos in a simple model of shear banding. Physical Review Letters, 92 (084502). pp. 1-4. ISSN 0031-9007

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DOI: 10.1103/PhysRevLett.92.084502

Abstract

We study a simple model of shear banding in which the flow-induced phase is destabilized by coupling between flow and microstructure (wormlike micellar length). By varying the strength of instability and the applied shear rate, we find a rich variety of oscillatory and chaotic shear banded flows. At low shear and weak instability, the induced phase pulsates next to one wall of the flow cell. For stronger instability, high shear pulses ricochet across the cell. At high shear we see oscillating bands on either side of central defects. We discuss our results in the context of recent experiments.

Item Type:Article
Subjects:MSC 2000 > 76 Fluid mechanics
MSC 2000 > 82 Statistical mechanics, structure of matter
MIMS number:2006.193
Deposited By:Miss Louise Stait
Deposited On:17 July 2006

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