Convective chemical-wave propagation in the Belousov-Zhabotinsky reaction.

Pattern Formation and Wave Propagation in the Belousov-Zhabotinskii Reaction

Critical conditions of chemical wave propagation in gel layers with an immobilized catalyst

Autowaves spreading in a thin layer of the Belousov-Zhabotinsky reaction with ferroin catalyst immobilized in silica gel have been studied. It is found that there is a critical thickness of this layer such that autowaves could not propagate in thinner layers. The results of computer simulations in the two-variable Rovinsky model qualitatively fit the experimental data for the temperature range ...

Excitation waves in reaction–diffusion media with non-monotonic dispersion relations

We report results on chemical wave propagation obtained from experiments with a modified Belousov–Zhabotinsky reaction. Under pseudo-onedimensional reaction conditions, excitation pulses either form closely stacked, stable wavepackets or merge with a slow leading pulse in front-to-back collisions. Moreover, wave stacking can involve the cascading formation of metastable clusters. These phenomen...

Convective effects on a propagating reaction front

Unstable concentration gradients inherent in traveling chemical waves can give rise to buoyancy-driven convection, altering the speed of the wave. When an excitable Belousov– Zhabotinsky reaction system is confined within a sufficiently narrow, vertical two-dimensional channel, convection arises at a symmetry-breaking bifurcation point. The observed linear rate of change of wave speed with the ...

Microfluidic Systems for the Belousov-Zhabotinsky Reaction

We describe an experimental methodology for the study of chemical self-organization in micropatterned reaction systems. Our approach is based on office-printer-assisted soft lithography and allows the fabrication of centimeter-scale devices with reactor units as small as 50 μm. The devices are made from the elastomeric material poly(dimethylsiloxane) and are filled with a modified Belousov-Zhab...