The Stationary, One-Way MF and Time Dependent, One-Way MF preset studies are available with the Moisture Flow interfaces. They solve for the fluid flow and moisture transport variables in two separated steps, Stationary for the former preset study, and Time Dependent for the latter.

For a fully-coupled approach, use the Stationary, Time Dependent, Stationary with Initialization, or Time Dependent with Initialization studies.

See Studies and Solvers in the COMSOL Multiphysics Reference Manual for more details.