[bastil]

Hello all,

I have a stl-File with multiple volume regions in. CfMesh warns me about non-manifoldness which is caused by the multi-regions present.
However, it just meshes one of the regions - and an unimportant one. I want to have the choice which region to be meshed or to keep all regions and delete the unrequired once afterwards.

Thanks for your hints.

[carsten]

Hi Bastil,

I have the same request, as I quite often use STLs which form multiple "volumes", but I found no way in cartesianMesh to define a "region of interest" by a seed point or the like.

Apart from that I think that cfmesh is really nice. It works much better than snappyHexMesh at difficult curved surfaces, IMHO.

Best,

Carsten

[franjo_j]

Hello,

In the current form, cfMesh generates a mesh in a single domain. If there exist multiple disconnected parts, it will only keep the part with most cells and remove cells from the other ones.
The warning "Surface is not a manifold" is just a warning that the topology of the surface mesh cannot be preserved in the volume mesh.
The functionality to capture all domains is not in the official release. There is a branch feature-multiMaterial in the git repository containing some basic work towards multi-material meshing. It allows for using allowDisconnectedDomains 1 in meshDict, and the mesher then preserves the mesh inside all volumes and meshes them independently, and it does not ensure conformal connection between the domains. This serves as a temporary solution.
I hope this helps.

Regards,

Franjo

[aminem]

Dear Franjo,
I have download and compiled a cfMesh-code to test the feature-multiMaterial by adding allowDisconnectedDomains 1 in my meshDict but it's doesn't work!!!
Do I have something wrong with my approach?
Thanks

[itsme_kit]

Hi Franjo

I have followed your solution to generate mesh independently.

I'm wondering if we have a solution to build a conformal mesh up to now.

Looking forward to hearing from you.

Best Regards,

Kit

Originally Posted by franjo_j

Hello,

In the current form, cfMesh generates a mesh in a single domain. If there exist multiple disconnected parts, it will only keep the part with most cells and remove cells from the other ones.
The warning "Surface is not a manifold" is just a warning that the topology of the surface mesh cannot be preserved in the volume mesh.
The functionality to capture all domains is not in the official release. There is a branch feature-multiMaterial in the git repository containing some basic work towards multi-material meshing. It allows for using allowDisconnectedDomains 1 in meshDict, and the mesher then preserves the mesh inside all volumes and meshes them independently, and it does not ensure conformal connection between the domains. This serves as a temporary solution.
I hope this helps.

Regards,

Franjo