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mixing plane model: too much backflow and does not converge

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Old   August 19, 2010, 23:11
Default mixing plane model: too much backflow and does not converge
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Hi Guys,

I am currently trying to setup a mixing plane model for an Axial flow Turbine model. Both the Stator and rotor have different number of blades at different stages. For example the stator has 4 blades in the 1st stage and 7 in the rest of the stages.

I was told by the ANSYS guys that i could extract a periodic volume even though the number of blades vary and use a mixing plane model to capture the interactions between the rotor and stator .

I have extracted the periodic volume and set up the mixing plane model in fluent. But when I run it see a lot of back flow at the rotor-stator interfaces (mixing planes) and the solution oscillates and never converges even after running for several iterations

My boundary conditions are as follows
velocity Inlet: 8.2m/s
Pressure outlet: 0Pa
pressure inlet-pressure outlet boundaries at the mixing planes

I would really appreciate any feedback on this.
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Old   December 4, 2014, 00:31
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Were you able to find the solution to this problem? I am facing the same problem (reverse flow at the interface).
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