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autoPatch creates too many patches on O-mesh

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Old   March 20, 2015, 21:23
Default autoPatch creates too many patches on O-mesh
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Klaus
Join Date: Mar 2009
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Hello,

I created an O-mesh using construct2d, converted it into GMSH format as plot3dToFoam for the native construct2d file format didn't work (streaming issues/errors...), gmshToFoam worked fine, checkMesh is happy with the mesh as well.

In order to create the boundary patches I used autoPatch - overwrite 59 (and a number of other angles in an attempt to fix the issue).

The problem is, that I end up with 6 patches instead of 4. There are always 2 band like strips of 136 faces starting at the trailing edge of the airfoil, leading to the farfield boundary. These two bands are very close together.

How should I deal with this?


The boundaries are:

6
(
auto0
{
type patch;
nFaces 136;
startFace 81164;
}
front //auto1
{
type patch;
nFaces 40800;
startFace 81300;
}
back //auto2
{
type patch;
nFaces 40800;
startFace 122100;
}
airfoil //auto3
{
type patch;
nFaces 300;
startFace 162900;
}
farfield //auto4
{
type patch;
nFaces 300;
startFace 163200;
}
auto5
{
type patch;
nFaces 136;
startFace 163500;
}
)
Attached Images
File Type: jpg problem_patches.jpg (31.3 KB, 10 views)
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