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MRF- rotor zone extended beyond the boundary wall

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Old   October 22, 2014, 10:13
Question MRF- rotor zone extended beyond the boundary wall
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Litao
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Hi foamers,

I'm trying to simulate the flow in a mixing tank. When I try to specify the rotor zone for rotating frame, I had some questions about its boundary.

My impeller is really close the outer wall, as you can see it in the attached image. So my question is: can I assign the rotor zone extended beyond the outer wall, like the red box in the first image; or do I have to assign a smaller zone, like the red box in the second image?

Thanks in advance!
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File Type: jpg rotorZone1.jpg (24.2 KB, 23 views)
File Type: jpg rotorZone2.jpg (24.0 KB, 20 views)
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Old   October 29, 2014, 06:50
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Julian Langowski
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DearLitao,

for my wind turbine rotor blade it worked to choose the rotationg zone too big, so that it exceeds the meshed space.

Best regards
Julian
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Old   October 30, 2014, 01:11
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Abhijit
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Hi ,

Assign a smaller rotor as shown in the second image and i think it should work
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Old   October 30, 2014, 01:52
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Yogesh Bapat
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Hello,

As said in previous post you can smaller rotating zone or otherwise if you want to use bigger zone you can try to use non-rotating patch specification in MRF zone.

Regards,
-Yogesh
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Old   November 6, 2014, 16:23
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Litao
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Thank you all.

I'm now using the smaller rotating zone, I think it works fine.
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