Dynamic regimes in a periodically forced reaction cell with oscillatory chemical reaction

Abstract

Periodic and aperiodic regimes in a forced chemical system are studied experimentally and the observations are interpreted on the basis of phase transition curves evaluated both from the model equations and experimentally. The periodically oscillating system of the Belousov-Zhabotinski reaction in a flow-through stirred reaction cell exhibited phase transition curves both of the type 1 and 0 when a single pulse perturbation by bromide ions was used. This behaviour is only partly described by the mathematical models studied. Phase synchronization, intermittency and chaos were observed when the frequency and amplitude of concentration perturbations were varied in continuous forcing experiments. A one-dimensional deterministic model based on the experimental phase curves describes results of continuous forcing relatively well; better agreement was reached when effects of experimental noise were included in the model.