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Article Dans Une Revue EPL - Europhysics Letters Année : 2003

Timescales in shear banding of wormlike micelles

Résumé

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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hal-00136480 , version 1 (14-03-2007)

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Ovidiu Radulescu, Peter D. Olmsted, Jean-Paul Decruppe, Sandra Lerouge, Jean-François Berret, et al.. Timescales in shear banding of wormlike micelles. EPL - Europhysics Letters, 2003, 62 (2), pp.230-236. ⟨10.1209/epl/i2003-00351-x⟩. ⟨hal-00136480⟩
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