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[blockMesh] How to make a cylinder mesh that the cells dense inside and sparse outside

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Old   April 11, 2024, 10:33
Default How to make a cylinder mesh that the cells dense inside and sparse outside
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Huang, Ching-Chan
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How to make a cylinder mesh that is Dense inside and sparse outside, I have try this video but there were some error when I used checkMesh. https://youtu.be/3v50ev75aDw?si=LvcrGvT77deIaMp1
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Old   April 12, 2024, 05:59
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If I understand your target correctly, you cannot do that with blockMesh alone. It is very basic with snappyHexMesh, though. Just create a big blockMesh (cube) with the spacing you want to have "on the outside" and then you can use a searchableCylinder source in snappyHexMesh (defined in the geometry section of the snappyHexMeshDict) and add a volumetric refinement for that region inside the refinementRegions section of the snappyHexMeshDict. This is a very basic thing and should be easily found in tutorials online.
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blockmesh, blockmesh cylinder, cylinder, negative

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