The subnode can added from the context menu (right-click the Transport Properties parent node), as well as from the
Physics toolbar,
Attributes menu, provided that
Convection is selected as a transport mechanism.
Some physics interfaces provide the turbulent kinematic viscosity, and these appear as options in the Turbulent kinematic viscosity νT list. The list always contains the
User defined option where any value or expression can be entered.
See the section About Turbulent Mixing in the
CFD Module User’s Guide (this link is available online or if you have the CFD Module documentation installed).