The basic steps for setting up a problem involving wall surface reactions are the same as those presented in Section 14.1.2 for setting up a problem with only fluid-phase reactions, with a few additions:
Define Models Species Transport & Reaction...
Mixture properties include the following:
| You will find all species (including the solid/bulk and site species) in the list of
Fluent Fluid Materials. For a species such as Si, you will find both Si(g) and Si(s) in
the materials list for the
fluid material type.
Note that if you were modeling the silicon deposition reactions in the example in Section 14.2.1, you would need to include both Si species (gas and solid) in the mixture.
| Note that the
final gas phase species named in the
Selected Species list should be the carrier gas
if your model includes species in dilute mixtures. (This is because
FLUENT will not solve the transport equation for the final species.) Note also that any
reordering, adding or deleting of species should be handled with caution, as described in Section
Define Boundary Conditions...
In addition to the boundary conditions described in Section 14.1.5, you will first need to indicate whether or not surface reactions are in effect on each wall. If so, you will then need to assign a reaction mechanism to the wall. To enable the effect of surface reaction on a wall, turn on the Reaction option in the Species section of the Wall panel.
| If you have enabled the global
Low-Pressure Boundary Slip option in the
Viscous Model panel, the
Shear Condition for each wall will be reset to
No Slip even though the slip model will be in effect. Note that the
Low-Pressure Boundary Slip option is available only when the
Laminar model is selected in the
Viscous Model panel.
See Section 7.13.1 for details about boundary condition inputs for walls. See Section 7.19.6 for details about boundary condition inputs for porous media.