Oregonator Spiral Waves
Simplified BZ reaction model — Tyson-Fife reduction
Parameters
ε (time scale):
0.10
δ (activator diff.):
0.002
f (stoichiometry):
1.4
q (reaction ratio):
0.002
Add Spiral Seed
Break Wave Front
Clear
Pause
Chemistry
Oregonator (3-variable BZ):
εu̇ = u(1-u) − fv(u-q)/(u+q)
v̇ = u − v
u = [HBrO₂] activator
v = [Ce⁴⁺] inhibitor
Spiral tip rotates at ω
λ ∝ √(D/ω)
BZ reaction: Belousov–
Zhabotinsky (1951/1961)
Classic excitable medium
Color Map
High u (excited)
Medium
Low u (rest)