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Phys Rev E Stat Nonlin Soft Matter Phys. 2008 Jan;77(1 Pt 1):011920. Epub 2008 Jan 25.

Hydrodynamics of self-propelled hard rods.

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Physics Department, Syracuse University, Syracuse, New York 13244, USA.


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 nonthermal 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.

[Indexed for MEDLINE]

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