17.4.2 Setting Boundary Conditions for the ECFM Transport

For the ECFM transport equation option for the premixed combustion models, you will need to set an additional boundary condition at flow inlets and exits: the flame area density, $\Sigma$. Valid inputs for the Flame Area Density are as follows:

• $\Sigma = 0$: no flame area (unburned)

• $\Sigma > 0$: burning with nonzero flame area