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Chaos / Volume 1 / Issue 4

Chaos 1, 411 (1991); http://dx.doi.org/10.1063/1.165851 (10 pages)

Transition to chemical turbulence

Q. Ouyang and Harry L. Swinney

Center for Nonlinear Dynamics and Department of Physics, University of Texas, Austin, Texas 78712

(Received 12 August 1991; accepted 30 September 1991)

Experiments have been conducted on Turing‐type chemical spatial patterns and their variants in a quasi‐two‐dimensional open spatial reactor with a chlorite–iodide–malonic acid reaction. A variety of stationary spatial structures−hexagons, stripes, and mixed states−were observed, and transitions to these states were studied. For conditions beyond those corresponding to the emergence of patterns, a transition was observed from stationary spatial patterns to chemical turbulence, which is marked by a continuous motion of the pattern within a domain and of the grain boundaries between domains. The transition to chemical turbulence was analyzed by measuring the correlation length, the average pattern speed, and the total length of the domain boundaries. The emergence of chemical turbulence is accompanied by a large increase in the defects in the pattern, which suggests that this is an example of defect‐mediated turbulence.

KEYWORDS and PACS

Keywords

CHEMICAL REACTIONS, TURBULENCE, SPATIAL DISTRIBUTION, HEXAGONAL CONFIGURATION, POLYACRYLATES, STEADY−STATE CONDITIONS, CONCENTRATION RATIO, IODIDES, MALONIC ACID, CORRELATIONS, GRAIN BOUNDARIES, BIFURCATION, CHLORITES, CORRELATION LENGTH, DEFECT STRUCTURE

PACS

  • 82.40.-g

    Chemical kinetics and reactions: special regimes and techniques

  • 47.27.Cn

    Transition to turbulence

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.165851

PUBLICATION DATA

ISSN

1054-1500 (print)  
1089-7682 (online)

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