Hydrodynamics of self-propelled hard rods

2007/08/17 by Aparna Baskaran, M. Cristina Marchetti · 2 citations
Physics and Astronomy · #cond-mat.soft #cond-mat.stat-mech

paper · pdf · doi:10.1103/physreve.77.011920

published as Phys. Rev. E Vol. 77, 031311 (2008) · 10 pages, 3 figures. Submitted to PRE

arxiv created 2007/08/17 · arxiv updated 2009/12/01

Abstract

Motivated by recent simulations and by experiments on aggregation of gliding bacteria, we study a model of the collective dynamics of self-propelled hard rods on a substrate in two dimensions. The rods have finite size, interact via excluded volume and their dynamics is overdamped by the interaction with the substrate. Starting from a microscopic model with non-thermal noise sources, a continuum description of the system is derived. The hydrodynamic equations are then used to characterize the possible steady states of the systems and their stability as a function of the particles packing fraction and the speed of self propulsion.

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