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.

If there are several types of domains, with subsequent and different reactions occurring within them, it might be necessary to remove some domains from the selection. These are then defined in an additional Species Source node.

Add a source term Si (SI unit: mol/(m3·s)) for each of the species solved for. Enter a value or expression in the field of the corresponding species.