Species Properties
Use this node to define parameters specific to each of the species. It is available when the Migration in electric field checkbox is selected in the Transport Mechanisms section of the interface.
The node will change its label depending on what inputs are available in the node. If only Charge is available, it will be labeled “Species charges”.
Charge
Enter the charge number zc (dimensionless, but requires a plus or minus sign) for each species.
Activity
This section is available when the Species Activity combo box is set to Debye–Hückel or User defined.
If Debye–Hückel is selected, enter the ion size number, a0, for each species. If User defined is selected, enter the activity coefficient, f, for each species.