A famous oscillatory chemical reaction propagating across a petri dish. This image does not show the famous rotating spirals, which have to be made by splitting a front.

Chemistry by Michael Rogers

Tags:   patternformation pattern nonlinear instability formation experiment emergence belousov zhabotinsky bz reaction chemistry

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A famous oscillatory chemical reaction propagating across a petri dish. This image shows a few of the famous rotating spirals, which have to be made by splitting a front.

Chemistry by Michael Rogers

Tags:   zhabotinsky spiral pattern patternformation nonlinear formation autocatalytic experiment emergence chemical belousov bz reaction chemistry

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The BZ reaction with no front breaking or stirring.

This image has quite a different white balance and was made with a different camera than the more red-looking ones posted here.

Chemistry by Michael Rogers

Tags:   zhabotinsky red reaction physics patternformation pattern nonlinear formation experiment emergence chemistry chemical bz belousov automata autocatalytic

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The famous Belousov Zhabotinsky oscillatory chemical reaction in a petri dish. Images taken every 4 seconds are animated.

The somewhat messy areas that occur in the deeper parts of the dish are due to the extra effect of convection, most likely driven by gradients of surface tension.

Chemistry by Michael Rogers

See also
www.youtube.com/watch?v=i3jVO3dLrhY
for a different version.

Tags:   zhabotinsky waves wave ring reaction physics patternformation pattern nonlinear movie instability formation experiment emergence chemistry chemical bz belousov automata autocatalytic

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The famous Belousov Zhabotinsky chemical reaction in a petri dish. The action is speeded up 8 x from real life. Pacemaker nucleation sites emit circular waves. Breaking the wavefront with a wire triggers pairs of spiral defects which emit more closely spaced waves which eventually fill the container.

Chemistry by Michael Rogers, camera by Stephen Morris.

Tags:   zhabotinsky waves wave spiral ring reaction physics patternformation pattern nonlinear instability experiment emergence chemistry chemical bz belousov autocatalytic

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