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Problem in overset postprocessing

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Old   July 14, 2018, 12:18
Default Problem in overset postprocessing
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Adrien
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Hi all,

I've run the simpleRotor case using overPimpleFoam solver.
Everything is fine during the calculation.
However, I have an issue when I want to display the results in paraview (see attached picture).
I think it's an issue in Paraview but I am not sure.
Do you have idea?
Thank you,
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File Type: png viewrotor.png (22.2 KB, 242 views)
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Old   July 14, 2018, 14:09
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Robin Kamenicky
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Hi Adrien,

To me it seems, that more parts overlays each other. It seems that all meshparts were chosen to be shown in paraview menu on the left side (patches and also internalMesh) at once or some similar problem. If that is the case, chose just patches or internalMesh at once to be shown.

Cheers,
Robin
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Old   July 14, 2018, 14:27
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Adrien
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Hi Robin,

Thanks for your reply.
I thought the same thing but only internalMesh is activated.
You can find attached another view of the mesh. It seems that the background is still fully present, even in the "hole" region.

Adrien
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File Type: png meshview.png (132.4 KB, 151 views)
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Old   July 14, 2018, 16:47
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Santiago Lopez Castano
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Quote:
Originally Posted by Adri54 View Post
Hi all,

I've run the simpleRotor case using overPimpleFoam solver.
Everything is fine during the calculation.
However, I have an issue when I want to display the results in paraview (see attached picture).
I think it's an issue in Paraview but I am not sure.
Do you have idea?
Thank you,
You have to do threshold or clip in order to eliminate the fringe (overlap) regions. I guess there is a kind of IBLANK attribute/variable that comes along with the solution...
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Old   July 14, 2018, 17:10
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Adrien
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Same result when I do a clip (see attachment).
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File Type: png clip.png (176.2 KB, 119 views)
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Old   July 14, 2018, 17:18
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Santiago Lopez Castano
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Quote:
Originally Posted by Adri54 View Post
Same result when I do a clip (see attachment).
You didnt remove the fringe region it seems to me, and tou need a hole in the background mesh. Have in mind that the background grid should also be clipped. Im not familiar with OF overset, but i have produced overset results and visualized with paraview. You should have a scalar field describing
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Old   July 15, 2018, 05:41
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Adrien
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It's a tutorial from Openfoam library.
$FOAM_TUTORIALS/incompressible/overPimpleDyMFoam/simpleRotor
I've just run the ./Allrun script.
I don't know how to remove this region.
The mesh region present are:
- internalmesh
- overset
- walls
- hole
- frontAndback
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Old   July 15, 2018, 06:09
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anonymous
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Hi!


Here you can find a brief explanation about the regions:
https://www.openfoam.com/releases/op...merics-overset


If you run the simulation, there will be a scalar field called cellTypes. This will tell you which cell is calculated, which is not, and which is interpolated of the background mesh. If you set a treshold for cellType between 0 and 1, you'll see only the calculated and the interpolated cells.
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Old   July 15, 2018, 08:55
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Adrien
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Ok, got it.
Thanks for your help.
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