Transport and collective dynamics in suspensions of confined swimming particles

Direct simulations of large populations of confined hydrodynamically interacting swimming particles at low Reynolds number are performed. Hydrodynamic coupling between the swimmers leads to large-scale coherent vortex motions in the flow and regimes of anomalous diffusion that are consistent with ex...

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Bibliographic Details
Published in:Physical review letters 2005-11, Vol.95 (20), p.204501.1-204501.4, Article 204501
Main Authors: HEMANDEZ-ORTIZ, Juan P, STOLTZ, Christopher G, GRAHAM, Michael D
Format: Article
Language:English
Subjects:
Biological and medical sciences
Exact sciences and technology
Fluid dynamics
Fundamental and applied biological sciences. Psychology
Fundamental areas of phenomenology (including applications)
Mammalian male genital system
Morphology. Physiology
Multiphase and particle-laden flows
Nonhomogeneous flows
Physics
Vertebrates: reproduction
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Summary:Direct simulations of large populations of confined hydrodynamically interacting swimming particles at low Reynolds number are performed. Hydrodynamic coupling between the swimmers leads to large-scale coherent vortex motions in the flow and regimes of anomalous diffusion that are consistent with experimental observations. At low concentrations, swimmers propelled from behind (like spermatazoa) strongly migrate toward solid surfaces in agreement with simple theoretical considerations; at higher concentrations this localization is disrupted by the large-scale coherent motions.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.95.204501