Flow-driven instabilities in the Belousov–Zhabotinsky reaction: Modelling and experiments
Literature Information
R. Tóth, A. Papp, V. Gáspár, J. H. Merkin, S. K. Scott, A. F. Taylor
The development of propagating patterns arising from the differential flow of reactants through a tubular reactor is investigated. The results from a series of experimental runs, using the BZ reaction, are presented to show how the wavelength and propagation speed of the patterns depend on the imposed flow velocity and the concentration of BrO3− in the inflow. A model for this system, based on a two-variable Oregonator model for the BZ reaction, is considered. A stability analysis of the model indicates that the mechanism for pattern formation is through a convective instability. Numerical simulations confirm the existence of propagating patterns and are in reasonable agreement with the experimental observations.
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