Use the Surface Concentration node to set the surface concentrations for one or more species on an edge (3D components) or a point (2D and 2D axisymmetric components).

Select each species check box as needed and enter a value or expression for each species concentration, cs,0,cs1,cs2... (SI unit: mol/(m2·s)).

To display this section, click the Show button () and select Advanced Physics Options.