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Pattern Formation in the Belousov−Zhabotinsky Reaction with Photochemical Global Feedback

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journal contribution
posted on 17.11.2000, 00:00 by Vladimir K. Vanag, Anatol M. Zhabotinsky, Irving R. Epstein
We have found a variety of oscillating patterns in the Belousov−Zhabotinsky (BZ) reaction−diffusion system with global negative feedback. Bulk oscillations and wave patterns arise at low values of the feedback strength. When the feedback exceeds a critical value, cluster patterns arise. Besides the standing, irregular, and localized clusters observed earlier, we have found new types of clusters:  three-phase, localized irregular, and localized oscillatory clusters. A model of three identical Oregonators with global negative coupling yields the same bifurcation scenario as found in our experiments.