Oscillations and turbulence induced by an activating agent in an active medium.
An excitable Belousov-Zhabotinsky reagent becomes oscillatory above a threshold of methanol concentration [Me]. The oscillation period decreases with increasing [Me]. A model describes these observations quantitatively. In a spatiotemporal setup, a [Me] gradient causes waves with spatially varying properties; this leads to wave breaks that end up in turbulence, both in experiments and in simulations with partial differential equations.
Woltering
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M
Max-Planck-Institut für Molekulare Physiologie, Postfach 500247, D-44202 Dortmund, Germany. markus@mpi-dortmund.mpg.de
Markus
M
M