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[mimozas1]

Hallo!

I am conducting a 2D airfoil simullation on 90deg AoA. I have the domain divided into 2 bodies as shown next.

[Keyur Kanade]

It looks like you have non conformal mesh. You need to define interfaces.
Please check help document for defining interfaces.
Alternatively you can use share topology and create conformal mesh.
Regards Keyur
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[mimozas1]

Hallo!
Thanks for the response! In fact i made a manual mesh interface and selected this rectangle as Maching mesh. In fact i am not sure if the right option is matching, cosnidering i want fluid to run through the doimain. I think Mapped, Static, Coupled Wall would be wrong, if i understand the Fluent Users Guide correctly.
If this is not the case and i should change this option please let me know!
Thanks for your help!
MK

[Rob]

If you want flow it's definitely not a coupled wall! Check both zones are fluid too.