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Inhomogeneous flows in sheared complex fluids

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Abstract

Using dynamic light scattering in heterodyne mode, we measure velocity profiles in two complex fluids known to exhibit stress plateau behaviour under shear: a wormlike micelle solution and a lamellar phase. In both cases, our data provide evidence for the simplest shear-banding scenario, according to which the effective viscosity drop in the system is due to the nucleation and growth of a highly sheared band in the gap. We point out that the position of the interface between the two structures is stable at a fixed local shear stress σ*.

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Acknowledgments

The authors are deeply grateful to C. Gay and to B. Pouligny for many fruitful discussions and comments on this work. The authors would like to thank the Cellule Instrumentation at CRPP for the realization of the heterodyne DLS setup.

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Authors and Affiliations

  1. Centre de Recherche Paul Pascal, Avenue Schweitzer, 33600, Pessac, France

    Sébastien Manneville, Jean-Baptiste Salmon, Lydiane Bécu & Annie Colin

  2. Groupe de Dynamique des Phases Condensées, Université Montpellier II, Place E. Bataillon, 34095, Montpellier, France

    François Molino

Authors
  1. Sébastien Manneville
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  2. Jean-Baptiste Salmon
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  3. Lydiane Bécu
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  4. Annie Colin
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  5. François Molino
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Correspondence to Sébastien Manneville.

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Manneville, S., Salmon, JB., Bécu, L. et al. Inhomogeneous flows in sheared complex fluids. Rheol Acta 43, 408–416 (2004). https://doi.org/10.1007/s00397-004-0366-7

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  • DOI: https://doi.org/10.1007/s00397-004-0366-7

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