Phototactic clustering of swimming microorganisms in a turbulent velocity field

Torney, Colin and Neufeld, Zoltan (2008) Phototactic clustering of swimming microorganisms in a turbulent velocity field. Physical Review Letters, 101 7: 1-4. doi:10.1103/PhysRevLett.101.078105

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Author Torney, Colin
Neufeld, Zoltan
Title Phototactic clustering of swimming microorganisms in a turbulent velocity field
Journal name Physical Review Letters   Check publisher's open access policy
ISSN 0031-9007
1079-7114
Publication date 2008-08-01
Year available 2008
Sub-type Article (original research)
DOI 10.1103/PhysRevLett.101.078105
Open Access Status File (Publisher version)
Volume 101
Issue 7
Start page 1
End page 4
Total pages 4
Place of publication College Park, MD, United States
Publisher American Physical Society
Language eng
Abstract We study the distribution of swimming microorganisms advected by a two-dimensional smooth turbulent flow and attracted towards a light source through phototaxis. It is shown that particles aggregate along a dynamical attractor with fractal measure whose dimension depends on the strength of the phototaxis. Using an effective diffusion approximation for the flow, we derive an analytic expression for the increase in light exposure over the aggregate and by extension an accurate prediction for the fractal dimension based on the properties of the advection and the statistics of the attracting field.
Keyword Particles
Flows
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
ERA 2012 Admin Only
 
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Citation counts: TR Web of Science Citation Count  Cited 12 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 12 times in Scopus Article | Citations
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Created: Tue, 31 Jan 2012, 21:43:50 EST by Kay Mackie on behalf of School of Mathematics & Physics