The properties of each phase present are defined using the Liquid, the
Gas, and the
Porous Matrix subnodes respectively. The Unsaturated Porous Medium node supports material properties using a
Porous Material node (described in the
COMSOL Multiphysics Reference Manual), where properties are defined per phase in a similar manner.
Add an Adsorption or a
Dispersion subfeature to the
Unsaturated Porous Medium to account for the corresponding transport mechanism.