Period-adding bifurcations in mixed-mode oscillations in the Belousov-Zhabotinsky reaction at various residence times in a CSTR

Periodic patterns of mixed-mode oscillations with successive numbers of sma ll-amplitude oscillations followed by one large-amplitude oscillation (peri od-adding phenomenon) have been observed in the asymptotic regime of the Be lousov-Zhabotinsky reaction (bromate-malonic acid-ferroin) in a CSTR (conti nuously stirred tank reactor) at decreasing residence times. Such period ad ding has been predicted by a simple model proposed recently for a qualitati ve description of asymptotic and transient oscillations observed in the BZ system. Patterns qualitatively corresponding to the experimental ones are o btained in this model.