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Error in the rotor-diffuser interface when grid is refined

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Old   August 5, 2019, 06:09
Default Error in the rotor-diffuser interface when grid is refined
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Overijssel
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Hello everyone,

I have been encountering a problem. When I am doing simulation of a pump with a coarse mesh (cell size: 0.05 m) the simulation runs fine. There is an error warning that " Hard points are not supported and might be ignored in the 3D pre inflation " . I disregard this warning and it runs fine.

When I decrease the cell size to to 0.035 m, it gives me the same error warning plus error at the interface when i try to run the simulation. I had a similar error in the solver before but I reduced the impeller-volute domain interface tolerance to 1 mm and it worked fine. Now that I want to have a grid independent study, the solver does not let me.

The error is included in the attachment.
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Old   August 19, 2019, 15:13
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Can you add an image of said interface?
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Old   August 19, 2019, 17:08
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Hello.

Have You tried suggestion from error message?

Maybe You should try to use GGI with "no intersection allowed" or/and use bitmap instead of direct approach.


Best regards,
Oskar
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Old   August 19, 2019, 18:34
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Glenn Horrocks
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You should load the def file into CFD-Post and have a close look at the interface. There is probably something wrong with the interface elements, so have a look to find out what.
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