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Timescales in shear banding of wormlike micelles

O. Radulescu·P. D. Olmsted·J. P. Decruppe·S. Lerouge·J. F. Berret·G. Porte
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Abstract

We show the existence of three well defined time scales in the dynamics of wormlike micelles after a step between two shear rates on the stress plateau. These time scales are compatible with the presence of a structured interface between bands of different viscosities and correspond to the isotropic band destabilization during the stress overshoot, reconstruction of the interface after the overshoot and travel of a fully formed interface. The last stage can be used to estimate a stress diffusion coefficient.

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O. Radulescu, P. D. Olmsted, J. P. Decruppe, S. Lerouge, J. F. Berret, G. Porte. 2002-09-23. Timescales in shear banding of wormlike micelles. https://doi.org/10.1209/epl%2Fi2003-00351-x

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