In this paper, we show by means of numerical simulations how new patterns can emerge in a system with wave instability when a unidirectional advective flow (plug flow) is added to the system. First, we introduce a three variable model with one activator and two inhibitors with similar kinetics to those of the Oregonator model of the Belousov-Zhabotinsky reaction. For this model, we explore the type of patterns that can be obtained without advection, and then explore the effect of different velocities of the advective flow for different patterns. We observe standing waves, and with flow there is a transition from out of phase oscillations between neighboring units to in-phase oscillations with a doubling in frequency. Also mixed and clustered states are generated at higher velocities of the advective flow. There is also a regime of “waving Turing patterns” (quasi-stationary structures that come close and separate periodically), where low advective flow is able to stabilize the stationary Turing pattern. At higher velocities, superposition and interaction of patterns are observed. For both types of patterns, at high velocities of the advective field, the known flow distributed oscillations are observed.
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June 2012
Research Article|
April 19 2012
Pattern formation in a reaction-diffusion-advection system with wave instability
Igal Berenstein
Igal Berenstein
Institut für Physik und Astronomie, Universität Potsdam
, Karl-Liebknecht-Str. 24/25, 14476 Potsdam, Germany
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Chaos 22, 023112 (2012)
Article history
Received:
December 16 2011
Accepted:
March 31 2012
Citation
Igal Berenstein; Pattern formation in a reaction-diffusion-advection system with wave instability. Chaos 1 June 2012; 22 (2): 023112. https://doi.org/10.1063/1.4704809
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