Initiation Front and Annihilation Center of Convection Waves Developing in Spiral Structures of Belousov-Zhabotinsky Reaction.

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  • Sakurai Tatsunari
    Faculty of Engineering, Yamaguchi University, Tokiwadai 2557, Ube 755
  • Miike Hidetoshi
    Faculty of Engineering, Yamaguchi University, Tokiwadai 2557, Ube 755
  • Yokoyama Etsuro
    Faculty of Engineering, Yamaguchi University, Tokiwadai 2557, Ube 755
  • Müller Stefan C.
    Abteilung Biophysik, Institut für Experimentelle Physik, Otto–von–Guericke–Universität Magdeburg, Universitätsplatz 2, D–39016 Magdeburg, Germany

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  • Initiation Front and Annihilation Cente

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Abstract

Spiral patterns are representative dissipative structures that can be observed in reaction-diffusion systems such as Belousov-Zhabotinsky (BZ) reactions. We found periodic initiation of moving structures of convection from the collision line of the fronts of two spiral patterns triggered in a shallow layer of a BZ solution. The waves of convection propagated toward the respective centers of the spirals, and were annihilated there. The flow direction of the convection waves reversed every 15--16 s. These curious pattern dynamics can be interpreted as a demonstration of a hierarchical and/or a functional order in the complex system of reaction, diffusion and convection.

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