Turbulent Mixing
Use this node to account for the turbulent mixing of the chemical species caused by the eddy diffusivity. This node should typically be used when the specified velocity field corresponds to a RANS solution.
This feature is only available in a limited set of add-on products. See https://www.comsol.com/products/specifications/ for more details on availability.
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.
Turbulent Mixing Parameters
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.
The default Turbulent Schmidt number ScT is 0.71 (dimensionless).
Further Reading
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).