Ansys Employee

Break the setup into parts - it's easier to learn and troubleshoot on. I also suggest doing the test runs on a pipe bend. It's near enough the same but will run/fair far more quickly. 

For the boundaries review Profiles and Expressions. I think the latter would be better. Also consider whether you want to push or pull flow and in which direction. 

Look for humidity on here - it's simple but not set quite as you've asked for.