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snappy - duplicate faces, non-consecutive shared points ++

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Old   June 24, 2014, 04:18
Default snappy - duplicate faces, non-consecutive shared points ++
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Petr Furmanek
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Hi all,

when meshing with snappy (a bit comlicated area - underhood ), the checkMesh reports the following errors:

--
<<Number of duplicate (not baffle) faces found: 22. This might indicate a problem.
<<Number of faces with non-consecutive shared points: 26. This might indicate a problem.
<<Writing 76 faces with non-standard edge connectivity to set edgeFaces
<<Writing 1 cells with two non-boundary faces to set twoInternalFacesCells

Number of regions: 1 (OK).

Checking patch topology for multiply connected surfaces...
Patch Faces Points Surface topology
ffminx 0 0 ok (empty)
ffmaxx 0 0 ok (empty)
ffminy 0 0 ok (empty)
ffmaxy 0 0 ok (empty)
ffminz 0 0 ok (empty)
ffmaxz 0 0 ok (empty)
atmosphere 47880 53403 ok (non-closed singly connected)
inlet 18310 26322 ok (non-closed singly connected)
outletHVAC 1955 2892 ok (non-closed singly connected)
outletValve01 212 240 ok (non-closed singly connected)
outletValve02 222 265 ok (non-closed singly connected)
outletValve03 213 256 ok (non-closed singly connected)
outletValve04 220 260 ok (non-closed singly connected)
outletValve05 220 250 ok (non-closed singly connected)
outletValve06 221 241 ok (non-closed singly connected)
topWall 69468 83231 ok (non-closed singly connected)
wallLargeCells 156898 188065 ok (non-closed singly connected)
wallSmallCells 484344 563698 multiply connected (shared edge)
<<Writing 2 conflicting points to set nonManifoldPoints
--

I can't get rid of it no matter what snapping features, number of prism layers of quality settings I use. Does that mean the problem is in the underlying stl geometry?

P.
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Old   June 5, 2015, 12:02
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Louis Gagnon
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In case someone is reading on this old post..

Quote:
Originally Posted by petr.f. View Post
<<Number of faces with non-consecutive shared points: 26. This might indicate a problem.
I had a similar problem using snappyHexMesh and I was able to mitigate it by using the faceType baffle; condition and then using mergeOrSplitBaffles to properly separate the baffles, which snappy was apparently not able to do properly due to the highly complex geometry I'm using.

-Louis
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