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.
|Number of pages||7|
|Journal||Physica A: Statistical Mechanics and its Applications|
|State||Published - 1 Oct 2005|
|Event||Nonequilibrium Statistical Mechanics and Nonlinear Physics (MEDYFINOL'04) - |
Duration: 2 Dec 2004 → 4 Dec 2004
- Belousov-Zhabotinsky reaction
- Pattern formation