Oregonator Model with a Flow Term for the Belousov-Zhabotinskii Reaction Having Constant Feed. I ---Proposal of Model and Its Behavior---

A modified version of the Oregonator with a flow term is proposed to study experimental results on the Belousov-Zhabotinskii reaction having constant feed. Our model can properly exhibit the following three characteristic behaviors in oscillations of the concentration of Br(-) ; i.e., the existence of two oscillations with a large and a small amplitude, multipeak oscillations and a mixing of two types of oscillations which we call mixing phenomena. We have examined our model by simulations and shown how these characteristic behaviors occur. Especially a semi-global behavior around a stationary state is examined in connection with the mixing phenomena.