- In the Physics Model Selection dialog, select either a Multi-Component Gas or a Multi-Component Liquid material model from the Material group.
- Specify that your problem requires chemical reaction simulation by selecting Reacting in the Reaction Regime group.
- Specify whether your combustion is premixed, non-premixed or partially premixed by selecting the corresponding radio button in the Combustion group.
The availability of specific combustion modeling options depends on this choice and on the material model chosen earlier.