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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2006

Nonequilibrium clustering of self-propelled rods

Résumé

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=C∕η−1 where C is a constant.
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Dates et versions

hal-00905230 , version 1 (18-11-2013)

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Fernando Peruani, Andreas Deutsch, Markus Baer. Nonequilibrium clustering of self-propelled rods. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2006, 74 (3), pp.030904(R). ⟨10.1103/PhysRevE.74.030904⟩. ⟨hal-00905230⟩

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