Effective Viscosity of Microswimmer Suspensions

Salima Rafaï 1 Philippe Peyla 2 Jibuti Levan 3
1 LIPHY-DYFCOM
LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]
2 DYFCOM
LIPhy - Laboratoire Interdisciplinaire de Physique [Saint Martin d’Hères]
Abstract : 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.
Complete list of metadatas

Cited literature [8 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-00471216
Contributor : Salima Rafaï <>
Submitted on : Thursday, April 15, 2010 - 4:00:15 PM
Last modification on : Tuesday, September 11, 2018 - 9:24:02 AM
Long-term archiving on : Tuesday, September 14, 2010 - 5:29:36 PM

File

RAFAI_HAL.pdf
Files produced by the author(s)

Identifiers

Collections

Citation

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

Share

Metrics

Record views

395

Files downloads

525