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Article Dans Une Revue Physical Review Letters Année : 2010

Effective Viscosity of Microswimmer Suspensions

Résumé

The measurement of a quantitative and macroscopic parameter to estimate the global motility of a large population of swimming biological cells is a challenge. Experiments on the rheology of active suspensions have been performed. Effective viscosity of sheared suspensions of live unicellular motile microalgae (Chlamydomonas Reinhardtii) is far greater than for suspensions containing the same volume fraction of dead cells. In addition, suspensions show shear thinning behavior. We relate these macroscopic measurements to the orientation of individual swimming cells under flow and discuss our results in the light of several existing models.
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Dates et versions

hal-00471216 , version 1 (15-04-2010)

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Salima Rafaï, Philippe Peyla, Jibuti Levan. Effective Viscosity of Microswimmer Suspensions. Physical Review Letters, 2010, 104 (9), pp.098102. ⟨10.1103/PhysRevLett.104.098102⟩. ⟨hal-00471216⟩

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