Effective Viscosity of Microswimmer Suspensions
- 3 March 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 104 (9), 098102
- https://doi.org/10.1103/physrevlett.104.098102
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. DOI: http://dx.doi.org/10.1103/PhysRevLett.104.098102 © 2010 The American Physical SocietyKeywords
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This publication has 15 references indexed in Scilit:
- Reduction of Viscosity in Suspension of Swimming BacteriaPhysical Review Letters, 2009
- Chlamydomonas Swims with Two “Gears” in a Eukaryotic Version of Run-and-Tumble LocomotionScience, 2009
- Effective viscosity of dilute bacterial suspensions: a two-dimensional modelPhysical Biology, 2008
- Random walk models in biologyJournal of The Royal Society Interface, 2008
- Self-Concentration and Large-Scale Coherence in Bacterial DynamicsPhysical Review Letters, 2004
- Rheology of Active-Particle SuspensionsPhysical Review Letters, 2004
- Particle Diffusion in a Quasi-Two-Dimensional Bacterial BathPhysical Review Letters, 2000
- Methods of Digital Video Microscopy for Colloidal StudiesJournal of Colloid and Interface Science, 1996
- Hydrodynamic Phenomena in Suspensions of Swimming MicroorganismsAnnual Review of Fluid Mechanics, 1992
- A Mechanism for Non-Newtonian Flow in Suspensions of Rigid SpheresTransactions of the Society of Rheology, 1959