If I want to use the Homogeneous Gas Mixture as a material, I need to set the
turbulent Schmidt number.
What should be set as turbulent Schmidt number?
The characteristics of the flow field typically determine the turbulent Schmidt
number. For air and its constituents, in a variety of cases, an average value
of 0.7 is used. Of course, if more precise values are known, from measurement
or otherwise, they can be used.