Uploaded March 2010 | Updated September 2026, 1 week ago
This is a short movie of a thin glass capillary filled with CHD-BZ solution. Most of the reaction medium is dark meaning that it is chemically reduced (red in the actual experiment). Oxidation waves (bright bands; blue in the experiment) are triggered at the left end of the capillary tube and move rightwards. However, in this particular system and for certain ranges of initial concentrations, the leading frontier pulse always disappears and only wave pulses "protected" by the wake of a predecessor pulse are stable. Despite this unusual anomaly the wave-filled region expands. We refer to this phenomenon as "wave tracking". The underlying dispersion curve is limited to a finite wavelength band. As in all other BZ movies on this channel, waves result from reactions and diffusion only; there is no fluid motion.
This is a short movie of a thin glass capillary filled with CHD-BZ solution. Most of the reaction medium is dark meaning that it is chemically reduced (red in the actual experiment). Oxidation waves (bright bands; blue in the experiment) are triggered at the left end of the capillary tube and move rightwards. However, in this particular system and for certain ranges of initial concentrations, the leading frontier pulse always disappears and only wave pulses "protected" by the wake of a predecessor pulse are stable. Despite this unusual anomaly the wave-filled region expands. We refer to this phenomenon as "wave tracking". The underlying dispersion curve is limited to a finite wavelength band. As in all other BZ movies on this channel, waves result from reactions and diffusion only; there is no fluid motion.
