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Spiral Wave Pair in the Belousov-Zhabotinsky (BZ) Reaction Self-Annihilates

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Published on Feb 23, 2010

This video shows a chemical wave pattern in a thin layer of the 1,4-cyclohexanedione Belousov-Zhabotinsky (CHD-BZ) reaction. The waves are traveling color bands(blue on red). They are causes by the wildfire-like (isothermal) spreading of an autocatalytic reaction front. There is no fluid motion here; only reaction and diffusion. The CHD-BZ reaction is quite special and interesting as its chemical waves tend to show anomalous dispersion. In this specific example, two counter-rotating spirals move towards each other, collide and vanish. The collision wipes out the entire circular wave island.

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