There are several Single-Phase Flow interfaces available with the Polymer Flow Module. These are grouped by type and found under the
Fluid Flow >
Single-Phase Flow branch (

) when adding a physics interface. See
Modeling Polymer Flow to help you select which physics interface to use.
See The Single-Phase Flow, Laminar Flow Interface in the
COMSOL Multiphysics Reference Manual for other Fluid Flow interface and feature node settings.