Backfiring and nonannihilation collisions in the Belousov-Zhabotinsky medium

摘要

In this paper pattern formation and interactions in a spatially extended Belousov-Zhabotinsky reaction medium are investigated numberically.Backfiring,nonannihilation collisions and reflections at nonflux boundaries have been observed in the vicinity of three types of bifurcations including supercritical and subcritical Hopf-bifurcations and the Canard bifurcation.In the vicinity of a supercritical Hopf-Bifurcation,Backfiring and collision-stable behavior do not appear until the system exhibits small amplitude oscillations.In complement to earlier investgations,this study illustrates that the collision-stable behavior also exists under the dynamics where the system has only one stable attractor.The influence of relative molecular diffusivities on the backfiring and which shows that increasing the relative diffusivity of the activator favors the appearance of the above complex behavior.The transition from a supercritical Hopf-bifurcation to a Canard bifurcation has also been investigated.