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Dynamic regimes of hydrodynamically coupled self-propelling particles

I. Llopis and I. Pagonabarraga

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We analyze the collective dynamics of self-propelling particles (spps) which move at small Reynolds numbers including the hydrodynamic coupling to the suspending solvent through numerical simulations. The velocity distribution functions show marked deviations from Gaussian behavior at short times, and the mean-square displacement at long times shows a transition from diffusive to ballistic motion for appropriate driving mechanism at low concentrations. We discuss the structures the spps form at long times and how they correlate to their dynamic behavior.


PACS

05.10.-a Computational methods in statistical physics and nonlinear dynamics

82.70.Dd Colloids

87.18.Hf Spatiotemporal pattern formation in cellular populations

Subjects

Soft matter, liquids and polymers

Computational physics

Biological physics

Statistical physics and nonlinear systems

Chemical physics and physical chemistry

Dates

Issue 6 (September 2006)

Received 9 February 2006, accepted for publication 24 July 2006, in final form 24 July 2006

Published 23 August 2006



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