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Spatial cooperativity in soft glassy flows

Author

Listed:
  • J. Goyon

    (LOF, Université Bordeaux 1, UMR CNRS-Rhodia-Bordeaux 1 5258, 33608 Pessac cedex, France)

  • A. Colin

    (LOF, Université Bordeaux 1, UMR CNRS-Rhodia-Bordeaux 1 5258, 33608 Pessac cedex, France)

  • G. Ovarlez

    (Institut Navier, Université Paris Est, LMSGC, 77420 Champs sur Marne, France)

  • A. Ajdari

    (Gulliver, UMR CNRS – ESPCI 7083, 75005 Paris, France)

  • L. Bocquet

    (Laboratoire PMCN, Université Lyon 1, Université de Lyon, UMR CNRS 5586, 69622 Villeurbanne, France
    Technical University Munich)

Abstract

Emulsions and pastes: The importance of being thin The spreading of a paste or emulsion on a surface is a familiar everyday process — for example, the application of skin cream. Yet the underlying physics is complex. If too 'liquid' or too 'solid', the cream will not do the job. The properties of these materials lie somewhere between those of solids and liquids, and the relationship between the stresses and strains in the resulting flows are not trivial. Now Goyon et al. show that these thin films exhibit behaviour very different from that of the material in its bulk form, because of the influence of film thickness and the roughness of the surface on which they are flowing. For example, a thin creamy film may spread much more easily than predicted from its bulk flow properties. Such behaviour should be relevant in contexts ranging from the industrial processing of food and cosmetics to the geophysical hazards associated with debris flows.

Suggested Citation

  • J. Goyon & A. Colin & G. Ovarlez & A. Ajdari & L. Bocquet, 2008. "Spatial cooperativity in soft glassy flows," Nature, Nature, vol. 454(7200), pages 84-87, July.
    • Handle: RePEc:nat:nature:v:454:y:2008:i:7200:d:10.1038_nature07026
    DOI: 10.1038/nature07026
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