### 9.11.3. Stoichiometric Mixture Fraction

The stoichiometric mixture fraction for the flamelet library is required for computing the local equivalence ratio of the mixture, which is an important input parameter for the laminar burning velocity.

#### 9.11.3.1. Value

Specify the value for stoichiometric mixture fraction, .

#### 9.11.3.2. Reactants

Specify the reactants and their stoichiometric coefficients for the global reaction. The setup is the same as if it were for the reactants of an equivalent global single-step reaction. For example, if the flamelet library is a single component fuel burnt with air, , then the stoichiometric coefficient for Fuel would be set to , and for component , the value would be set to .

#### 9.11.3.3. Automatic

Select the automatic option to let the solver determine the stoichiometric mixture fraction from the flamelet library. This is an approximate method; when used, you should check the calculated value reported to the solver output file. For details, see CFX-Solver Output File (Combustion Runs) in the CFX-Solver Manager User's Guide.

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