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Formation and evolution of scroll waves in photosensitive excitable media
Takashi Amemiya1, Petteri Kettunen, Sandor Kadar
1Department of Chemistry, West Virginia University, Morgantown, West Virginia 26506-6045Department of Chemical Systems, National Institute of Materials and Chemical Research, Tsukuba, Ibaraki 305, Japan.
Abstract:
Experimental and computational studies of the formation and evolution of scroll waves in three-dimensional excitable media are presented. Scroll waves are initiated in the photosensitive Belousov-Zhabotinsky reaction by perturbing traveling waves transverse to their direction of propagation. Scroll rings are generated by perturbing circular waves, which expand or contract depending on the strength of an imposed excitability gradient and its direction relative to the rotational direction of the scroll wave. (c) 1998 American Institute of Physics.