Density wave propagation of a wave train in a closed excitable medium

Nobuhiko J. Suematsu, Taisuke Sato, Ikuko N. Motoike, Kenji Kashima, Satoshi Nakata

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


A wave train in an excitable reaction-diffusion medium shows a variety of spatiotemporal patterns as a result of interactions between the individual waves. In this paper, we report a novel spatiotemporal pattern in a wave train in a closed excitable medium. We carried out experiments using a photosensitive Belousov-Zhabotinsky reaction with Ru(bpy)32+ as a catalyst and a numerical calculation using the FitzHugh-Nagumo equation. A wave train was locally distributed as an initial condition and the number of waves was systematically varied. In both the experiment and numerical calculation, density wave propagation was formed in a wave train during relaxation with a large number of waves. Our results suggest that density wave propagation originates from inhibitory interaction between the waves.

Original languageEnglish
Article number046203
JournalPhysical Review E
Issue number4
Publication statusPublished - 2011 Oct 5


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