Lateral migration and segregation of vesicles with viscosity contrast in simple shear and Poiseuille flows

G. Coupier, N. Callens, B. Kaoui, C. Minetti, F. Dubois, C. Misbah, T. Podgorski

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    Lateral migration of vesicles (closed lipidic membranes) in a flow is characterized as a function of the relevant flow parameters and mechanical properties of the vesicles. We consider low Reynolds number flows, and migration is only due to viscous effects. Through experiments and simulations, we exhibit two different origins for such cross streamline migration: the presence of a wall, and a non1constant shear rate, as for instance in a Poiseuille flow. Such migration modifies the distribution of vesicles in a sheared polydisperse suspension; we present preliminary results proving that the hydrodynamic interactions between vesicles greatly modify the distribution of vesicles according to their sizes and deflation.
    Original languageEnglish
    Title of host publicationMechanics of Biological and Biomedical Materials
    EditorsK. Katti, C. Hellmich, U.G.K. Wegst, R. Narayan
    Place of PublicationWarrendale PA
    PublisherMaterials Research Society
    Pages1132-Z02-09-
    DOIs
    Publication statusPublished - 2009

    Publication series

    NameMaterials Research Society Symposium Proceedings
    Volume1132E
    ISSN (Print)0272-9172

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