17.3.4 Initializing the Progress Variable

Often, it is sufficient to initialize the progress variable $c$ to 1 (burnt) everywhere and allow the unburnt ( $c=0$) mixture entering the domain from the inlets to blow the flame back to the stabilizer. A better initialization is to patch an initial value of 0 (unburnt) upstream of the flame holder and a value of 1 (burnt) in the downstream region (after initializing the flow field in the Solution Initialization task page).

Solution Initialization Patch...

See Section  26.9.2 for details about patching values of solution variables.