Freestream indicator
 

Hey everyone,

I was wondering, would any of you be aware of a good freestream indicator for CFD codes? (something that would go from 0 to 1).

I imagine I could just use something like tanh( (vorticityMag/Cst)^4 ), but I was wondering if there was something "cleaner" out there in the literature. I am working with a k-w based model, so I also have k and omega to play with.

Thank you very much! :D

Joachim