walls that should be interior
 

hi guys. i'm working in a VAWT. i did make the mesh in gambit and imported it into fluent. the problem is that i have some interior faces and when i imported the mesh i have walls instead of interior bc.

i have two main zones: the one that its' close to the blades and the other one that's away. i set up a interface in between this two because the interior one is moving while the exterior is fixed. (first attachment)

the problem is in the interior zone. i split the interior face into a lot of faces, so i can have control on the mesh close the airfoil. i liked every straight edges in around the blades so i have "interior bc" when i import the mesh into fluent.
but, with the circular edges i can not link it (because they are not coincident). so as result i have a wal (like this in red thick line in the second attachment).

one solution is to set it as interface without setting the periodic or coupled options. as result i have a lot of errors concerning to this interfase (third screenshot)

what shoul i do? can anybody help me?
thanks!

One problem could be that you have 2 overlapping surfaces at that region and hence FLUENT considers both as walls, try and locate these 2 surfaces and fuse them, FLUENT will automatically create the fused surface as an interior.

Regards
Luke

the solution! and extra question
 

i could not do that, in the zone list to fuse, i just have the options for inlet, oulet, blades, interfase1, interfase2 and the wall (the inner edges close the blades). so, because i don't have the interior fluid zone in this list i can not fuse it with this walls.
i did do the next. i go back some steps in gambit, and split every circle of the fluid zone in such of parts as i have in the "close to the blades" zones. so i have a circle maded with some (5) arcs pieces. them, i linked every arc with the face's arc around the blade fluid zone. the result work fine when i imported it in fluent.

by the way, i did run the problem in fluent and i have like a error zone close to the interface (i think). i did make a mesh refinement and the weird velocity distribution persist. what should i do?

connection problem.
To persuade you: in gambit select one small disk and move it with a translation vector.
If gambit does it without error, then your 2 domains aren t connected (and then at the "interface" between both domains, you have superposed edges (circles) treated as wall in Fluent.

You have to connect the faces that are overlapping, otherwise when you export the mesh Fluent will treat the overlapping faces as wall.

hi guys
-mAx- : that's a good way to be sure about that. i did fix the problem (last post), but i'd try your suggestion and it's totally true: you can not move it if it is connected.
mali28: thanks. but i'd know which the problem was. the issue it was that i did not make any idea how to fix it. but i finally did.

so, muchas gracias chi@os. suerte con sus simulaciones!