In order to account for consumption or production of species in porous domains, the Species Source node adds source terms expressions
Si to the right-hand side of the species transport equations.
From the Selection list, choose the domains on which to define rate expression or expressions that govern the source term in the transport equations.
Add a source term Si (SI unit: mol/(m
3·s)) for each of the species solved for. Enter a value or expression in the field of the corresponding species.