Self-propelled non-linearly diffusing particles. Aggregation and continuum description
Statistical Mechanics
2009-11-11 v2
Abstract
We introduce a model of self-propelled particles carrying out a Brownian motion with a diffusion coefficient which depends on the local density of particles within a certain finite radius. Numerical simulations show that in a range of parameters the long-time spatial distribution of particles is non-homogeneous, and clusters can be observed. A number density equation, which explains the emergence of the aggregates and indicates the values of the parameters for which they appear, is derived. Numerical results of this continuum density equation are also shown.
Cite
@article{arxiv.cond-mat/0505203,
title = {Self-propelled non-linearly diffusing particles. Aggregation and continuum description},
author = {Cristobal Lopez},
journal= {arXiv preprint arXiv:cond-mat/0505203},
year = {2009}
}
Comments
5 pages, 5 figures. Major modifications. A new figure and some references added. Final version accepted for publication in Phys. Rev. E