Bloch-front turbulence: theory and experiments

Aric Hagberg, Bradley Marts, Anna L. Lin and Ehud Meron

Physica A: Statistical Mechanics and its Applications, 2005, vol. 356, issue 1, 88-94

Abstract: We report on experimental and theoretical findings of front destabilization that causes spontaneous spiral–vortex nucleation and produces a state of spatio-temporal disorder. The experiments were carried out on an oscillatory photosensitive Belousov–Zhabotinsky reaction that is periodically forced in time. Numerical studies were carried out on a modified Complex Ginzburg–Landau equation and on the FitzHugh–Nagumo model. Using velocity–curvature relations for fronts we associate the onset of spatio-temporal disorder with the Nonequilibrium Ising Bloch (NIB) bifurcation, and study the generic patterns that form on both sides of the bifurcation as the distance from it is increased.

Keywords: Pattern formation; Belousov–Zhabotinsky reaction; Ginzburg–Landau (search for similar items in EconPapers)
Date: 2005
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:356:y:2005:i:1:p:88-94

DOI: 10.1016/j.physa.2005.05.018

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