CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   OpenFOAM Meshing Format & General Technical (http://www.cfd-online.com/Forums/openfoam-meshing-technical/)
-   -   Mesh generation from dirty surface meshes (http://www.cfd-online.com/Forums/openfoam-meshing-technical/61924-mesh-generation-dirty-surface-meshes.html)

bastil December 9, 2007 17:41

Hi all, I want to collect s
 
Hi all,

I want to collect some ideas about my aim to run a case from which I only have dirty surface meshes. I do not have any geometry. Surface meshes represents geometry perfectly, however have free edges, overlappings,... From a commercial point of view this is good for surface wrapping or a tool like Harpoon. However, I want to use free software. Any ideas?
Gmsh could be possible: maybe convert into volumes and group them, mesh afterwards. However I do not know how to do. What oter ideas?

hsieh December 9, 2007 22:19

Hi, Without knowing the det
 
Hi,

Without knowing the details of your mesh, you can try tetgen. It can take surface mesh and generate a volume mesh from it.

pei

benru December 10, 2007 04:35

Or you can try SALOME www.salo
 
Or you can try SALOME www.salome-platform.org

bastil December 10, 2007 06:46

Hi, both tools as far as I
 
Hi,

both tools as far as I know have the disadvantage that surface mesh has to be absolutely clean (no interesections, free edges,...) My surface mesh is dirty. I need to repair this e.g. by wrapping or performing boolean operations on surfacemesh not on geometry (!) or I need to reconstruct geometry...

dmoroian December 10, 2007 06:53

Hm, to perform CAD cleaning as
 
Hm, to perform CAD cleaning as a prestep towards meshing.... that's tough. One tool would be ANSA, another Gambit, but both are commercial so... not good for you.
I saw that Blender is able to read iges file formats. I think it has boolean operations with different primitives, but when I asked on their discussion list if it is appropriate to use it as CAD clean software.... I got no answer (at least until now).

Dragos

bastil December 10, 2007 08:29

Hi, please read my requirem
 
Hi,

please read my requirements carefully: I do not have geometry, only dirty (intersecting, free edges,...) surface meshes from which I need to start volume meshing. Maybe one way would be to do geometry cleanup, however: Therefore a surface reconstruction is essential first.

dmoroian December 10, 2007 11:31

Sorry, my bad! But still thos
 
Sorry, my bad!
But still those above should help you since they are able to read stl file formats too, and work with them.

Dragos

bastil December 10, 2007 11:34

So Tetgen and Salome can perfo
 
So Tetgen and Salome can perform boolean operations on surface meshes or do surface reconstruction? That are really good news...

tog December 10, 2007 11:48

You can also have a look to jc
 
You can also have a look to jcae (http://jcae.sf.net)

bastil December 10, 2007 12:17

jcae does not seem to be able
 
jcae does not seem to be able to do boolean operations on meshes or surface reconstruction, does it?


All times are GMT -4. The time now is 01:52.