Bloch-front turbulence: Theory and experiments

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

Research output: Contribution to journalConference articlepeer-review

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.

Original languageEnglish
Pages (from-to)88-94
Number of pages7
JournalPhysica A: Statistical Mechanics and its Applications
Volume356
Issue number1
DOIs
StatePublished - 1 Oct 2005
EventNonequilibrium Statistical Mechanics and Nonlinear Physics (MEDYFINOL'04) -
Duration: 2 Dec 20044 Dec 2004

Keywords

  • Belousov-Zhabotinsky reaction
  • Ginzburg-Landau
  • Pattern formation

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