Abstract
Within a light-sensitive Belousov-Zhabotinskii medium we study the interaction of meandering spiral waves. Using an open gel-reactor we find experimental evidence that a small pair of spiral waves undergoes a symmetry-breaking instability, where one member of the spiral pair overwhelms its neighbor and pushes it to the periphery of the medium. To avoid this instability we consider the interaction of a spiral wave with its virtual mirror image close to a plane boundary impermeable to diffusion. The drift of this pseudo-bound state parallel to the boundary occurs on a time scale up to two orders of magnitude larger than the rotation period. The experimental data agree qualitatively with results of numerical simulations obtained within a modified kinematic approach.
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Brandtstädter, H., Braune, M., Engel, H. (1998). Interaction of meandering spiral waves in active media. In: Parisi, J., Müller, S.C., Zimmermann, W. (eds) A Perspective Look at Nonlinear Media. Lecture Notes in Physics, vol 503. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0104968
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DOI: https://doi.org/10.1007/BFb0104968
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