[snappyHexMesh] Combine snappyHexMesh with existing mesh

Saxwax · September 30, 2011, 00:00

Hello All,

I was wondering if there is anyway to use snappyHexMesh (sHM) in conjunction with an existing mesh?

I have a structured multi-block mesh that I created in Pointwise. At present the mesh only extends slightly beyond the boundary layer. The complexity of the geometry I am working with makes it difficult to "fill" the remainder of the domain with blocks. Also the range of flow orientations required means that I would need to re-mesh several times to keep the cells more or less aligned with the flow. I also need to think about the wake refinement for each of the flow orientations. There is the option of using tetrahedral cells to "fill" the remainder of the domain. I just had the idea that there might be a way to use sHM instead - especially now that there is feature handling in 2.0.*.

Has anyone tried anything like this before?

Regards,
D.

elvis · September 30, 2011, 02:56

=>There is the option of using tetrahedral cells to "fill" the remainder of the domain.

For me it looks like that polyDualMesh is the right tool for you

polyDualMesh: Creates the dual of a polyMesh, e.g. can be used to generate a “honeycomb” polyhedral mesh from a tetrahedral mesh.

from
http://www.openfoam.com/features/mesh-generation.php

September 30, 2011, 00:00	Combine snappyHexMesh with existing mesh	#1
Saxwax New Member Saxwax Join Date: Aug 2010 Posts: 17 Rep Power: 14	Hello All, I was wondering if there is anyway to use snappyHexMesh (sHM) in conjunction with an existing mesh? I have a structured multi-block mesh that I created in Pointwise. At present the mesh only extends slightly beyond the boundary layer. The complexity of the geometry I am working with makes it difficult to "fill" the remainder of the domain with blocks. Also the range of flow orientations required means that I would need to re-mesh several times to keep the cells more or less aligned with the flow. I also need to think about the wake refinement for each of the flow orientations. There is the option of using tetrahedral cells to "fill" the remainder of the domain. I just had the idea that there might be a way to use sHM instead - especially now that there is feature handling in 2.0.*. Has anyone tried anything like this before? Regards, D.

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September 30, 2011, 02:56		#2
elvis Senior Member Elvis Join Date: Mar 2009 Location: Sindelfingen, Germany Posts: 618 Blog Entries: 6 Rep Power: 23	=>There is the option of using tetrahedral cells to "fill" the remainder of the domain. For me it looks like that polyDualMesh is the right tool for you polyDualMesh: Creates the dual of a polyMesh, e.g. can be used to generate a “honeycomb” polyhedral mesh from a tetrahedral mesh. from http://www.openfoam.com/features/mesh-generation.php