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Gyrotaxis in a steady vortical flow

Durham, William M. and Climent, Eric and Stocker, Roman Gyrotaxis in a steady vortical flow. (2011) Physical Review Letters (PRL), vol. 106 (n° 3). pp. 238102-1-238102-4. ISSN 0031-9007

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Official URL: http://dx.doi.org/10.1103/PhysRevLett.106.238102

Abstract

We show that gyrotactic motility within a steady vortical flow leads to tightly clustered aggregations of microorganisms. Two dimensionless numbers, characterizing the relative swimming speed and stability against overturning by vorticity, govern the coupling between motility and flow. Exploration of parameter space reveals a striking array of patchiness regimes. Aggregations are found to form within a few overturning time scales, suggesting that vortical flows might be capable of efficiently separating species with different motility characteristics.

Item Type:Article
Additional Information:Thanks to American Physical Society editor. The definitive version is available at
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Massachusetts Institute of Technology - MIT (USA)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: Eric CLIMENT
Deposited On:29 Nov 2012 10:11

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