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Open Access item Self-propelled non-linearly diffusing particles. Aggregation and continuum description.

Authors:López, Cristóbal
Keywords:Aggregation, Brownian motion, Diffusion, Numerical analysis, Density
Issue Date:22-Apr-2005
Publisher:American Physical Society
Citation:Physical Review E 72, 061109 (1-5) (2005)
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.
Description:5 pages, 5 figures.-- PACS nrs.: 05.40.-a, 89.75.Kd.-- PMID: 16485933 [PubMed].-- ArXiv pre-print available: http://arxiv.org/abs/cond-mat/0505203
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevE.72.061109
Appears in Collections:(IFISC) Artículos

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