Nonequilibrium clustering of self-propelled rods
Motivated by aggregation phenomena in gliding bacteria, we study collective motion in a two-dimensional model of active, self-propelled rods interacting through volume exclusion. In simulations with individual particles, we find that particle clustering is facilitated by a sufficiently large packing...
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Published in | Physical review. E, Statistical, nonlinear, and soft matter physics Vol. 74; no. 3 Pt 1; p. 030904 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
01.09.2006
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Subjects | |
Online Access | Get more information |
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Summary: | Motivated by aggregation phenomena in gliding bacteria, we study collective motion in a two-dimensional model of active, self-propelled rods interacting through volume exclusion. In simulations with individual particles, we find that particle clustering is facilitated by a sufficiently large packing fraction eta or length-to-width ratio kappa . The transition to clustering in simulations is well captured by a mean-field model for the cluster size distribution, which predicts that the transition values kappac of the aspect ratio for a fixed packing fraction eta are given by kappac=Ceta-1 where C is a constant. |
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ISSN: | 1539-3755 |
DOI: | 10.1103/PhysRevE.74.030904 |