Spatiotemporal Oscillations and Rheochaos in a Simple Model of Shear Banding

S. M. Fielding and P. D. Olmsted
Phys. Rev. Lett. 92, 084502 – Published 24 February 2004

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.

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  • Received 28 October 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.084502

©2004 American Physical Society

Authors & Affiliations

S. M. Fielding* and P. D. Olmsted

  • Polymer IRC and School of Physics & Astronomy, University of Leeds, Leeds LS2 9JT, United Kingdom

  • *Electronic address: s.m.fielding@leeds.ac.uk

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Issue

Vol. 92, Iss. 8 — 27 February 2004

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