Abstract
AbstractLongtime measurements in a isothermal CSTR over 25–30 residence times (100 oscillations) showed that at least two oscillators (attractors) exist together with their combination bands in the Fourier spectrum of the unperturbed (constant in‐flow) Belousov‐Zhabotinsky (BZ) oscillations. Slow and large fluctuations in successive power spectra were observed. They are due to transitions between attractors and do not represent chaos. Such slow fluctuations were also observed in the quasi‐periodic region but not in the entrained state of the sinusoidally perturbed BZ reaction. From previous experiments we show entrainment of order 2 (superharmonic) and 1/2 (subharmonic) as examples. The extreme sensitivity of the Fourier spectra with respect to slight changes in the forcing period (0.2–0.3%) is noteworthy.
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More From: Berichte der Bunsengesellschaft für physikalische Chemie
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