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How to mirror two boundaries for cyclic patches?

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Old   November 20, 2013, 08:24
Default How to mirror two boundaries for cyclic patches?
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Frank Ubber
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Hi everyone,

I am new in meshing with blockMesh/snappyHexMesh and I am having trouble with achieving a mesh with 100% matching surfaces on two cyclic boundaries. Can anyone tell me what's the best way to mirror two meshed surfaces using Open Source software (preferably blockMesh/snappyHexMesh)? The surface area of the boundaries is the same, the created cell number (and node positions) is just different. My domain exists as a STEP/STL/OBJ file.

Thank you and best regards,

Frank Ubber
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Old   November 20, 2013, 14:49
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Marco A. Turcios
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What you are asking is a difficult proposition. Besides defining the cyclics as boundaries with more refinement and aligning your mesh symetrically, these isn't a whole lot you can do. You can always reduct the matching tolerance
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Old   November 20, 2013, 18:00
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So, how are meshes for use with cyclic patches usually made since you need a perfect patching partner face?
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Old   November 20, 2013, 18:16
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Marco A. Turcios
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Well, it doesn't have to be 100% perfect, but it helps with the results. To do 100% matching you need to use a tool like blockMesh or similar that can create the faces explicitly based on your input. Also using binary format in your input files helps, since you can keep more precision.
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