Boundary Conditions
 

I have confusion on the BC's to be used for the below cases when I have fluid flowing through the pipe.

1. when the gas is superheat at 80C.

2.when it is two phase at 60C and

3. when it is subcooled at 50C.


Im using Fluent, what kind of BC do I use. I believe using wall temps with the above gas temp will be incorrect.

Appreciate your help.
Thanks.