Concentration
The Concentration node adds a boundary condition for the species concentrations: for example the following condition specifies the concentration of species, ci:
Set the concentration of all species except the one computed from the electroneutrality condition, which ensures that the net charge is zero. See Species.
Concentration
Specify the concentration ci (SI unit: mol/m3) for each species individually. Select the check box for the species to specify the concentration, and 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 that species’ mass fraction.
Constraint Settings
To display this section, click the Show More Options button () and select Advanced Physics Options.