Hey ! I (superficially) looked up the Belousov-Zhabotinsky reaction and can confirm it is related to the Gray-Scott model.

The Belousov-Zhabotinsky reaction involves an autocatalytic reaction and chemical species diffusing at different rates, just like in the Gray-Scott model. The main differences are related to constraints of doing actual chemistry instead of simulating it :

• The speed constant is (roughly) fixed for any given reaction (and temperature). Scientists cannot tune speed constants like I did in the simulation
• In the simulation, we constantly add some “food” and remove some catalyst. In an actual chemical reactor, there must be an process to achieve this. A real world implementation of the Gray-Scott model would probably use something like a semi-permeable membrane above/below the petri dish. In the Belousov-Zhabotinsky reaction, it is other chemical reactions that ensure “food” gets replenished and the catalyst gets consumed