17.4.1 Modifying the Constants for the ECFM Flame Speed Closure

In general, you will not need to modify the constants used in the equations presented in this section in the separate Theory Guide. The default values are suitable for a wide range of premixed flames.

Select the ITNFS Treatment. You have a choice of constant-delta, meneveau, blint, poinsot, or as a constant. The various ITNFS treatments are described in detail in this section in the separate Theory Guide. You can set the ITNFS Flame Thickness (in this equation in the separate Theory Guide), the ITNFS Value ( $A$ in this equation in the separate Theory Guide), the Turbulent Schmidt Number (Sc $_t$), and the Wall Flux Coefficient in the Species Model dialog box.

Figure 17.4.1: The Species Model Dialog Box for ECFM