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Nonequilibrium clustering of self-propelled rods

Fernando Peruani, Andreas Deutsch, and Markus Bär
Phys. Rev. E 74, 030904(R) – Published 15 September 2006

Abstract

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 η or length-to-width ratio κ. 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 κc of the aspect ratio for a fixed packing fraction η are given by κc=Cη1 where C is a constant.

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  • Received 12 April 2006

DOI:https://doi.org/10.1103/PhysRevE.74.030904

©2006 American Physical Society

Authors & Affiliations

Fernando Peruani1,2, Andreas Deutsch2, and Markus Bär3

  • 1Max Planck Institute for Physics of Complex Systems, Nöthnitzer Strasse 38, 01187 Dresden, Germany
  • 2ZIH, TU Dresden, Zellescher Weg 12, 01069 Dresden, Germany
  • 3Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, 10587 Berlin, Germany

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Issue

Vol. 74, Iss. 3 — September 2006

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