ar X iv : 0 70 8 . 24 01 v 1 [ co nd - m at . s of t ] 1 7 A ug 2 00 7 Hydrodynamics of self - propelled hard rods
نویسنده
چکیده
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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