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Overset rotating domain

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Old   August 7, 2021, 15:08
Lightbulb Overset rotating domain
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Hi everyone!

I am simulating 2 propellers with overset mesh. I have a mesh for each prop and a background box mesh.
When I simulate only one prop, I have good quality of the solution, when I simulate both I have this kind of bad resolution.
Could you please help me? Do you know if I have to set something else? My turbulence model + near wall treatment is compatible with my case (the results I am having with the single propeller confirm that).

Maybe I have to set something else?
Thank you in advance!
E.G
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Old   August 10, 2021, 15:10
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Please post any evidence for "bad resolution"?. Are you referring to convergence issues due to mesh?.
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Old   August 10, 2021, 15:22
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The convergence is ok and even the thrust and power report files are what I expected, but then when I display contour of velocity field, for example, I have this kind of field (image attached). It is just where I have the other mesh appended.
I have a perfect field when I simulate with the same meshes only one propeller. In this case I have 2 meshes, one for each propeller , which overset each other, and then the background box.
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File Type: jpg EC01A35E-FD3F-478F-B33B-3B4481C7D989.jpg (109.1 KB, 13 views)
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