Forum: OpenFOAM Meshing & Mesh Conversion
July 10, 2019, 18:56
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Replies: 67
Views: 21,499
Ashish,
From memory, my script refined an...
Ashish,
From memory, my script refined an existing single wall layer, so it needed to be created first by SHM. However, one key issue with the approach was that the OpenFOAM wall layer refinement...
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Forum: OpenFOAM Meshing & Mesh Conversion
May 5, 2015, 14:35
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Replies: 67
Views: 21,499
It sounds like you are trying to write to a...
It sounds like you are trying to write to a location where permissions don't allow you to do so, or execute a script that is lacking the executable attribute. Try chmod +x filename on the script to...
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Forum: OpenFOAM Meshing & Mesh Conversion
February 19, 2015, 17:38
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Replies: 67
Views: 21,499
Hello James,
In short, SHM is quite...
Hello James,
In short, SHM is quite atrocious when it comes to generating multiple layers, but producing one is normally feasible as long as the surrounding mesh is uniform regular hex, so you...
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Forum: OpenFOAM Meshing & Mesh Conversion
July 24, 2014, 20:26
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Replies: 67
Views: 21,499
Benoit,
Very fair comment, but then let's...
Benoit,
Very fair comment, but then let's view the matter from the other angle: as generating cell size related viscous layers in a mesh zone with variable refinement doesn't produce a useful...
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Forum: OpenFOAM Meshing & Mesh Conversion
July 23, 2014, 17:54
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Replies: 67
Views: 21,499
Dear Franjo,
I understand the temptation of...
Dear Franjo,
I understand the temptation of tying the layers thickness to the local cell size, but this makes it dependent on local mesh refinement. In the case of feature-based refinement, it...
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Forum: OpenFOAM Meshing & Mesh Conversion
July 16, 2014, 16:33
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Replies: 67
Views: 21,499
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Forum: OpenFOAM Meshing & Mesh Conversion
July 15, 2014, 21:57
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Replies: 67
Views: 21,499
It is an interesting concept and I have done...
It is an interesting concept and I have done quite a lot of incremental wall layer refinement myself as discussed earlier in this thread, for other reasons. I did generate y+ fields sometimes, but...
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Forum: OpenFOAM Meshing & Mesh Conversion
July 10, 2014, 21:45
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Replies: 67
Views: 21,499
Dear Franjo,
I certainly wouldn't expect you...
Dear Franjo,
I certainly wouldn't expect you to drop everything to alter cfMesh. If you wish to improve and develop it further, I would be very happy to push further towards using it in my...
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Forum: OpenFOAM Meshing & Mesh Conversion
July 6, 2014, 23:07
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Replies: 67
Views: 21,499
I have uploaded here...
I have uploaded here (https://onedrive.live.com/?cid=F01F55B19BBBEF87&id=F01F55B19BBBEF87!156) a stripped down test case showing how far I have got experimenting with cfMesh using the type of...
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Forum: OpenFOAM Meshing & Mesh Conversion
July 2, 2014, 17:22
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Replies: 67
Views: 21,499
Franjo,
Fantastic effort, many thanks for...
Franjo,
Fantastic effort, many thanks for releasing your code as open source.
Regarding anisotropic refinement, basic shapes would be very adequate in my view. For my application, even just a...
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Forum: OpenFOAM Meshing & Mesh Conversion
June 26, 2014, 17:04
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Replies: 67
Views: 21,499
I have manually crafted a STL file this way...
I have manually crafted a STL file this way indeed, by STL-meshing each patch in CAD, naming the solid-endsolid entities and concatenating the lot.
The mesher complains that the geometry is...
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Forum: OpenFOAM Meshing & Mesh Conversion
June 23, 2014, 18:06
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Replies: 67
Views: 21,499
I can only add a bit to Pete's reply. I was...
I can only add a bit to Pete's reply. I was unable to do mesh convergence studies with SHM either, precisely because I couldn't produce enough meshes for that, the slightest change to anything caused...
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Forum: OpenFOAM Meshing & Mesh Conversion
June 22, 2014, 17:23
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Replies: 67
Views: 21,499
Hello Benoit,
I obtained nice layers on some...
Hello Benoit,
I obtained nice layers on some trivial 3D shapes when I was trying to assess whether I could use Salome, but when I introduced actual geometries, I ran into reliability issues with...
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Forum: OpenFOAM Meshing & Mesh Conversion
June 9, 2014, 17:23
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Replies: 67
Views: 21,499
Pete,
It might have got easier in the more...
Pete,
It might have got easier in the more recent versions. In a nutshell, you mesh your volume with a suitable algorithm (tets or hexa i,j,k) and viscous layers are added as an "additional...
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Forum: OpenFOAM Meshing & Mesh Conversion
June 8, 2014, 21:44
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Replies: 67
Views: 21,499
A few more words in the way of a temporary...
A few more words in the way of a temporary conclusion... while the approach I described earlier delivered some encouraging results, in the end meshing still wasn't robust enough overall. Not only the...
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Forum: OpenFOAM Meshing & Mesh Conversion
May 14, 2014, 17:19
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Replies: 67
Views: 21,499
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Forum: OpenFOAM Meshing & Mesh Conversion
May 13, 2014, 17:10
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Replies: 67
Views: 21,499
Robo,
I have never run into this error so...
Robo,
I have never run into this error so far within this context. Is it a result of refining to an extremely thin inner layer (it almost sounds like it), i.e. near the end of the process, or does...
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Forum: OpenFOAM Meshing & Mesh Conversion
May 12, 2014, 19:43
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Replies: 67
Views: 21,499
refineLayerMesh script for wall mesh generation
I scripted the above equation as part of my numerical towing tank setup, I am attaching the result here for those who might want to experiment with the method.
Bash scripts tend to look like some...
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Forum: OpenFOAM Meshing & Mesh Conversion
May 6, 2014, 18:01
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Replies: 67
Views: 21,499
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Forum: OpenFOAM Meshing & Mesh Conversion
May 1, 2014, 19:12
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Replies: 67
Views: 21,499
Pete,
I generate a hex mesh with cubic cells...
Pete,
I generate a hex mesh with cubic cells of 0.015m around the geometry and then I grow one layer in SHM with a size relative to the background mesh and set to 2.
My STL geometry is about 2m...
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Forum: OpenFOAM Meshing & Mesh Conversion
May 1, 2014, 17:09
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Replies: 67
Views: 21,499
fedvasu,
I refine the single grown layer...
fedvasu,
I refine the single grown layer using a series of scripted calls to refineWallLayer with strategically defined refinement ratios:
# Strategic wall refinement of a single grown layer
#...
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Forum: OpenFOAM Meshing & Mesh Conversion
April 30, 2014, 23:38
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Replies: 67
Views: 21,499
Improving snappyHexMesh
I have had a 3-week long battle with SHM to try and obtain good reliable layers for resolving the boundary layer around yacht hulls and... lost it in some way: I was forced to devise a workaround. I...
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