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[snappyHexMesh] Ugly layer addition around corners

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Old   October 20, 2014, 14:18
Question Ugly layer addition around corners
Yuanchuan Liu
Join Date: Oct 2012
Posts: 31
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SailorLiu is on a distinguished road
Hi, foamers.

I have been using SHM in OpenFOAM-2.3.0 to help me generate mesh but something ugly shows up, mainly the layer around corners, when I use it to add layers.

My geometry is a column with a heave plate, shown as an attachment.

The second image demonstrates a slice of the mesh after the snapping process.

The third and fourth images show the mesh after the layer addition process, form which you may see the mesh is distorted around the corner. I use the expansionRatio and firstLayerThickness to control the layer thickness while the relativeSizes parameter is set to false. I am wondering how the layer thickness is defined in SHM. As far as I am concerned, the thickness of the layer decreases when it comes to the corners, resulting in the distortion of the exterior mesh.

Any help is appreciated. Thank you very much!

My SHMDict, blockMeshDict and STL for my geometry are also attached here.
Attached Images
File Type: png geometry.png (7.9 KB, 124 views)
File Type: png snapped.png (4.1 KB, 244 views)
File Type: png layer.png (11.6 KB, 275 views)
File Type: png layer-detail.png (9.7 KB, 280 views)
Attached Files
File Type: zip (14.2 KB, 55 views)
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corners, layer addition

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