Oregonator — Belousov-Zhabotinsky Oscillator

Reduced chemical oscillator model: the mathematical heart of the BZ reaction

Parameters

f (stoichiometry) 1.0 ε (time scale X) 0.04 q (activation) 0.0008 ε' (time scale Z) 0.005

Chemical Species

X = HBrO₂ (autocatalytic intermediate)
drives the fast excursions

Y = Br⁻ (inhibitor)
suppresses X, resets oscillation

Z = Ce⁴⁺ (oxidized catalyst)
color indicator of BZ reaction

Equations

        ε dX/dt = qY − XY + X(1−X)

        dY/dt = −qY − XY + fZ

        ε' dZ/dt = X − Z

        Field-Körös-Noyes (1972)

        Tyson reduction of the BZ mechanism.