Dresden 2006 – wissenschaftliches Programm
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AKB: Biologische Physik
AKB 17: Population Dynamics
AKB 17.1: Vortrag
Mittwoch, 29. März 2006, 14:30–14:45, ZEU 260
Swarm formation of anisotropic self-propelled particles — •Fernando Peruani1,2, Markus Baer3, and Andreas Deutsch2 — 1Max-Planck Institute for the Physics of Complex Systems — 2ZIH, Technische Universität Dresden — 3Physikalisch-Technische Bundesanstalt
We study clustering (swarming) in biologically motivated systems of asymmetric self-propelled particles interacting through volume exclusion. Through simulations, we give numerical evidence of a transition to swarming. At the same time, we show that clustering effects can be captured by a mean field approach. We find that clustering is controlled by the particle aspect ratio κ and the packing fraction η. We report a transition from unimodal to bimodal cluster size distribution which is triggered by a critical κc. We show κc is a function of the packing fraction η. The applicability of these finding to bacterial swarming is also discussed.