[Ledeniso]

Good evening,
i am new here and this is my first post.
I would like to simulate a pressure drop in a flow but i dont really know how to do it
I've tried to do that with a fan like in the tutorial TJunctionFan. So combine tjunction and pitzDaily, but i do not really understand what the patches the baffles abd so on is...( i still red a lot on the openfoam website an on the web, but nothing is clearly explained)
So i tried another solution, i tried to do my own solver with my own geometry but its remains very complicate...
How can i work efficiently with openfoam, what are the first things to know before starting with my simulation


thank you
Leden...