Abstract
We use an open two-dimensional spatial reactor, to create sustained crescent-shaped excitation waves (“excyclons”) propagating in the same azimuthal direction in a thin annular layer of BZ medium. They can produce formerly unknown two-dimensional wavetrain patterns. Excyclons spread evenly around the annulus, as is often the case for pulse trains on ring fibres. However, depending on their number, the resulting rotating wavetrain structures may present either the highest symmetry or topological defects that develop in the radial direction. These defects may be locked in relative position or permanently exchanged from one excyclon to another. A dispersion relation is established. Numerical simulations based on a two-variable Tyson-Fife model of the reaction exhibit good qualitative agreement with experimental observations.
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Dulos, E., Boissonade, J., De Kepper, P. (1991). Excyclon Dynamics. In: Holden, A.V., Markus, M., Othmer, H.G. (eds) Nonlinear Wave Processes in Excitable Media. NATO ASI Series, vol 244. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-3683-7_38
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DOI: https://doi.org/10.1007/978-1-4899-3683-7_38
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