Phase change
 

I am trying to model water vapor condensation.

Its a pipe flow with 50 % air and 50 % Vapor(which will condense due to outside cold temp). How should i define the materials and how should i have a combination of them to use phase change models?

The outlet should show the mass fraction of condensate,vapor & air.

Can anybody sort this out?

Thanks and Regards, Pankaj.