June 1, 2020, 09:23
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mesh snapping at edge of patches created from .stl files
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#1
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New Member
Alexandra H
Join Date: May 2020
Posts: 4
Rep Power: 5
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Hello all, I hope you are well!
Backround:
- I am trying to simulate flow around a static aerofoil cascade (aka turning vanes) to direct flow around a 90deg corner.
- I am trying to reduce the yPlus value below 1 on the entire surface, while at the same time reducing computational requirements.
- To achieve this, I have split each aerofoil into 7 patches generated from stl files. The stl files are exported from solidworks and are waterproof (no overlap, no gaps).
Problem:
- During the snapping stage, the cells that are close to a patch edge snap correctly, but create a very small boundary face (see pictures).
- During the addLayers stage, this small face is extruding, leading to thin cells and a high Courant Number.
- Using a minArea limit is not possible, as the smallest problem cell is in refinement level 6 and the largest problem cell is in level 2. As such, their size magnitudes are different and cannot be captured by a minArea limit.
- The new "mergeAcrossPatches" option does not seem to solve this problem (it also does not seem to work well when I try to add layers).
I have spent a long time trying to fix this, so any suggestions would be more than welcome! Thanks in advance and regards,
Alex
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