Nonlinear effects on Turing patterns: Time oscillations and chaos

J. L. Aragón, R. A. Barrio, T. E. Woolley, R. E. Baker, P. K. Maini

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22 Scopus citations

Abstract

We show that a model reaction-diffusion system with two species in a monostable regime and over a large region of parameter space produces Turing patterns coexisting with a limit cycle which cannot be discerned from the linear analysis. As a consequence, the patterns oscillate in time. When varying a single parameter, a series of bifurcations leads to period doubling, quasiperiodic, and chaotic oscillations without modifying the underlying Turing pattern. A Ruelle-Takens-Newhouse route to chaos is identified. We also examine the Turing conditions for obtaining a diffusion-driven instability and show that the patterns obtained are not necessarily stationary for certain values of the diffusion coefficients. These results demonstrate the limitations of the linear analysis for reaction-diffusion systems. © 2012 American Physical Society.
Original languageEnglish (US)
JournalPhysical Review E
Volume86
Issue number2
DOIs
StatePublished - Aug 8 2012
Externally publishedYes

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