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"Unable to set source and target faces" in pimpleDyMFoam

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Old   January 27, 2016, 15:26
Default "Unable to set source and target faces" in pimpleDyMFoam
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R
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Hello,

I am trying to model a tidal turbine using the arbitrary mesh interface and pimpleDyMFoam. Right now I have everything meshing nicely (as far as I can tell), and it will run happily (again, as far as I can tell) for ~40-50 time steps, but then it crashes with the error "unable to set source and target faces." This happens right after "AMI: Creating addressing and weights between 122366 source faces and 123756 target faces" in the log, but those face numbers are consistent with every previous step. I am interpreting this as it's having a hard time solving across the rotating AMI boundary... maybe because they aren't meshed identically? But I don't know how to fix this (or even if it's the issue). The .stl files for the AMI and AMI_slave meshes are identical.

Any ideas would be greatly appreciated. Thanks,
R

Update: it seems like the two AMI meshes start out aligned and then start moving apart. Why??

Last edited by rbbarber; January 27, 2016 at 16:23. Reason: update
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Old   January 28, 2016, 03:12
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Hi R,

are you using solidBodyMotionFvMesh? Rotation?
To me it sounds like the rotational axis (if it's a rotation) isn't normal to the AMI faces and that's why they move apart.

regards

Elena
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Old   January 28, 2016, 20:16
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Yes, you're right. I had changed that in a previous simulation but forgot to in this one. Thank you,
R
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