Gambit Meshing

Shayankhan · December 18, 2016, 07:33

Sir i have prepared a channel domain like a cube in Gambit. There is one cylinder in it, which i have subtracted from cube. I have meshed the edges and faces prepared. But i am facing the problem in meshing the volume. Its giving an error while meshing. The problem do not appears if i do not subtract the cylinder volume from the main volume. The error appears as " Some of the face meshes are unstructured or the mapper not able to find the face nodes in order. Mapping of volume volume.1 failed"
Kindly tell me what i have to do in order to overcome this problem ?

KevinZ09 · December 19, 2016, 08:55

You should give some more details about your geometry and especially the kind of mesh you want to create before I can really help you out. Do you want a hex or tet mesh? And does the cylinder extend from top to bottom inside the cube/channel?

Either way, the reason Gambit is giving you problems with meshing the cube with cylinder subtracted is probably because you meshed the cylinders faces and Gambit isn't able to map the cube's flat faces onto the cylinders curved faces. Therefore, in general, don't mesh all faces before meshing a volume. Mesh some, and perhaps some edges, and let Gambit do the rest.

But that all depends on your geometry and desired mesh structure too, hence the need for additional info, and perhaps some figures.

December 18, 2016, 07:33	Gambit Meshing	#1
Shayankhan New Member Naveed Join Date: Dec 2016 Location: Saitama, Japan Posts: 11 Rep Power: 9	Sir i have prepared a channel domain like a cube in Gambit. There is one cylinder in it, which i have subtracted from cube. I have meshed the edges and faces prepared. But i am facing the problem in meshing the volume. Its giving an error while meshing. The problem do not appears if i do not subtract the cylinder volume from the main volume. The error appears as " Some of the face meshes are unstructured or the mapper not able to find the face nodes in order. Mapping of volume volume.1 failed" Kindly tell me what i have to do in order to overcome this problem ?

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December 19, 2016, 08:55		#2
KevinZ09 Senior Member Kevin Join Date: Dec 2016 Posts: 138 Rep Power: 9	You should give some more details about your geometry and especially the kind of mesh you want to create before I can really help you out. Do you want a hex or tet mesh? And does the cylinder extend from top to bottom inside the cube/channel? Either way, the reason Gambit is giving you problems with meshing the cube with cylinder subtracted is probably because you meshed the cylinders faces and Gambit isn't able to map the cube's flat faces onto the cylinders curved faces. Therefore, in general, don't mesh all faces before meshing a volume. Mesh some, and perhaps some edges, and let Gambit do the rest. But that all depends on your geometry and desired mesh structure too, hence the need for additional info, and perhaps some figures.