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3D Door Swing

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Old   July 21, 2011, 06:12
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Richard Wood
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Hello all,

I'm looking at modelling a door opening in a room. I started with a 2D (top-down) model, a UDF that opens to 45 degrees and the remeshing was absolutely fine. When I moved onto the problem in 3D, the remeshing is lacklustre at best. From my starting (unstrucutred) mesh with a max cell skew of about 0.75, when I preview the mesh motion, within about 0.001 seconds of flow time (of which I use 10 time steps at 0.0001) the cell skewness often exceeds 0.9 but will come back to around 0.8 and fluctuate around there. The simulation eventually crashes after 0.17 seconds of flow time due to a negative cell volume error. I've played around with the various remeshing and smoothing cettings but to no avail. If anyone has any information on remeshing using angular movements as opposed to the typical linear movements, it would be greatly appreciated.

Rich.
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Old   July 21, 2011, 09:52
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Neil
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Surely it would be easier to use a moving reference frame than use dynamic meshing for your problem.
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