16.2 Setting Up the Equilibrium Chemistry Model

In the equilibrium chemistry model, the concentrations of species of interest are determined from the mixture fraction using the assumption of chemical equilibrium (see this section in the separate Theory Guide). With this model, you can include the effects of intermediate species and dissociation reactions, producing more realistic predictions of flame temperatures than the Eddy-Dissipation model. When you choose the equilibrium chemistry option, you will have the opportunity to use the rich flammability limit (RFL) option.

To enable the equilibrium chemistry model

1.   Select Non-Premixed Combustion in the Species Model dialog box.

2.   Select Equilibrium in the Chemistry tab of the Species Model dialog box.

Figure 16.2.1: The Species Model Dialog Box ( Chemistry Tab)