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Centrifugal Fan - Left handed faces

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Old   December 28, 2021, 06:37
Default Centrifugal Fan - Left handed faces
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I did a frozen rotor simulation of a centrifugal fan in CFX, which worked pretty fine (impeller meshed with turbogrid). But afterwards I noticed that CFX doesn't support the eulerian wall film model, which is what I need in further investigations. So I changed to Fluent und the problems began...
I imported the CFX case in fluent. When I define the interface between the impeller and the volute Fluent says that there are overlapping zones and left handed faces are present. I have already tried all commands to fix these left handed cells. The solution diverges after a view interations, because (I think so) Fluent cannot handle these cells well.

I also tried to set up a new case without dependecies to CFX (impeller meshed with ansys mesher) but there the same problem appears.

What I looked up: The diameters of impeller and volute are the same for sure. Additionally the allignment of the rotation axis is the same.

I do not know how to continue. Anybody has an idea?
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cfx, fluent, frozen rotor, left-handed faces, mfr

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