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Forma, Vol. 30 (Special Issue), pp. S33–S53, 2015
doi:10.5047/forma.2015.s006

Review

Chemically Driven Convection in the Belousov-Zhabotinsky Reaction—Evolutionary Pattern Dynamics—

Hidetoshi Miike1*, Tatsunari Sakurai2, Atsushi Nomura3 and Stefan C. Müller4

1Organization for Research Initiatives, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, Japan
2Faculty of Science, Chiba University, 1-33, Yayoi-cho, Inage, Chiba, Japan
3Faculty of Education, Yamaguchi University, 1677-1, Yoshida, Yamaguchi, Japan
4Institute for Experimental Physics, Otto-von-Guericke University Magdeburg, Universitätsplatz 2, D-39106 Magdeburg, Germany
*E-mail address: miike@yamaguchi-u.ac.jp

(Received December 9, 2014; Accepted January 20, 2015)

Abstract. In this work we review recent developments of experimental studies on chemically driven convection (CDC) emerging in a thin solution layer of the Belousov-Zhabotinsky reaction. Firstly, there are solitary waves due to convections and oscillatory or rotating convections accompanied by phase waves leading to global flowpattern dynamics (called “flow waves”). The mechanism to realize the coherency and/or synchrony of such hydrodynamic patterns has not been established yet. Secondly, we summarize several models explaining some of these dynamics and show problems of the models. Especially, we emphasize the role of synchrony among nonlinear oscillators to establish hierarchical pattern dynamics of chemical wave trains and the flow waves. Thirdly, we demonstrate several examples of evolutionary pattern dynamics induced by CDCs in a batch reactor. In the reactor, the emerging phenomena show temporal development and evolutionary pattern dynamics. The direction of this development is from simple to complex, which looks like an evolution emerging in a real reaction-diffusion-convection system.

Keywords: Chemical Wave, BZ-Reaction, Convection, Flow Waves


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