Individually specify the concentration for each species. Select the check box for the Species to specify the concentration, and then enter a value or expression in the corresponding field. To use another boundary condition for a specific species, click to clear the check box for the concentration of that species.
To display this section, click the Show button (
) and select
Advanced Physics Options. You can find details about the different constraint settings in the section
Constraint Reaction Terms in the
COMSOL Multiphysics Reference Manual.