I figured that you wouldn't have the exact building modeled there, but these pictures show how you want the air moving above and below them, but not at them. That is what it helped me to understand.
Here is the article I wish I had when I was designing ventilation in my coop. Let us know if you still have questions, too.
https://www.backyardchickens.com/articles/repecka-illustrates-coop-ventilation.77659/