Reply To: No Flow Through Inner Domain — wind turbine

[Nate K.]

Hmm... I made a reply the other day but apparently it did not get sent... bummer, well here is a similar reply:

That worked! Excellent. And looking back I see the issue, and just to summarize our journey here for you and others that may have a similar issue in the future... in Fluent, in the mesh "map" (not sure the name), when clicking on the tiny red circle / line / that is surrounds the inner domain, it lists it as "wall-interior" and when clicking on the upper and lower edges of the outer domain, Fluent mesh calls these two "wall-exterior"....fine, makes sense. However, the confusion was, and since I was not aware, that I had to click on both edges of that TEENY red circle -- right on the edge of the line itself (and this is not an easy task... especially when you are not aware to do so... you have to zoom in greatly and keep moving / clicking till you get them) -- to see if there was two sides... and indeed there was two sides. Knowing this I could then choose them both -- they were both listed in the list of boundary zones afterall -- to make the interface. So not knowing to click on both edges of the TEENY circle, and since clicking on the circle and seeing "wall-interior" and then clicking on the upper and lower walls to the outer domain and seeing "wall-exterior", logically one would think, ok, two completely different sets of walls being in completely different locations so I definitely cannot -- nor do I want to -- make an iterface between them... so I didnt even try. Skip forward and through all the talking with you, and playing around lots with clicking in the mesh etc, and eventually I found out there was two sides to the inner circle / wall. 

Lesson: a wall between two face zones will have two sides.

Also, kinda still wondering, and kinda a rhetorical question [unless you know and want to answer! :-)] why the heck would Fluent make the upper and lower edges to the outer domain named the same and one side of the interior domain wall? Seems like when making the interface as I did that it would somehow also apply to the upper and lower walls of the outer domain, no? Maybe I still have not done something correct... well, at least I have flow inside the inner domain now... 

Thanks, Federico, for your help so far... I could not have done it without you!