### 9.8.2. Turbulent Burning Velocity

Select the model for the turbulent burning velocity. For many gas turbine applications, the Zimont model, which is the default, is a good choice.

#### 9.8.2.1. Value

Specify the value for the turbulent burning velocity. Typically, this will be an expression in terms of the laminar burning velocity.

#### 9.8.2.2. Zimont Correlation

Set the critical velocity gradient parameter to control the flame stretch and flame extinction under high turbulence. The default value of [1/s] is appropriate for methane/air combustion at standard conditions. At higher pressures, better results may be obtained by increasing the value. For details, see Adjusting Model Coefficients in the CFX-Solver Theory Guide.

Variable expressions (CEL) may be specified for Turbulent Burning Velocity Factor , Critical Velocity Gradient and Variance Coefficient .

#### 9.8.2.3. Peters Correlation

For details on the model coefficients, see Adjusting Model Coefficients in the CFX-Solver Theory Guide.

#### 9.8.2.4. Mueller Correlation

Set Critical Scalar Dissipation to control the amount of quenching occurring under rapid mixing. The default value is [1/s]. For details on the model coefficients, see Adjusting Model Coefficients in the CFX-Solver Theory Guide.

A variable expression (CEL) may be specified for Critical Scalar Dissipation.

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