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Proceedings Paper

Pattern formation in random walks with inertia
Author(s): Werner Horsthemke
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Paper Abstract

We study the Turing instability to stationary spatial patterns in reaction-transport systems with inertia. After a brief discussion of hyperbolic reaction-diffusion equations and reaction-Cattaneo equations we focus on reaction random walks, which are the most natural generalization of reaction-diffusion equations. We analyze the effect of inertia in the transport on spatial instabilities of the homogeneous steady state. Direction-dependent reaction walks, where the interaction between particles depends on the direction in which the particles are moving, allow us to take account of an energy requirement for reactive interactions, i.e., an activation energy, in the reaction-transport equation. We compare bifurcation conditions for direction-independent reaction walks and for direction-dependent reaction walks to assess the effect of inertia in the transport and the effect of activation energies in the kinetics on the Turing instability.

Paper Details

Date Published: 23 May 2005
PDF: 15 pages
Proc. SPIE 5845, Noise in Complex Systems and Stochastic Dynamics III, (23 May 2005); doi: 10.1117/12.610253
Show Author Affiliations
Werner Horsthemke, Southern Methodist Univ. (United States)

Published in SPIE Proceedings Vol. 5845:
Noise in Complex Systems and Stochastic Dynamics III
Laszlo B. Kish; Katja Lindenberg; Zoltan Gingl, Editor(s)

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