[bastil]

Hi,

so far I did not use to much of the meshing Tools from Foam, only solvers. Now I found autoRefineMEsh after looking around a bit today.

I think it is very interestign. I used blockmesh to generate a course bounding box hexa mesh and did autoRefinement afterwards. But I am not sure what it exactly did. CheckMesh gives me Hexas and Polys afterwards, but Paraview shows more or less Tetrahedrals. Is there som example or additional documentation about it?

Basti

[eugene]

ParaView cannot display polys properly, so decomposes them into tetras for display purposes.

[bastil]

I expected that. I saw OpenDX is able to display the mesh properly?
What I am wondering: Is the mesh body fitted? Or is body-fitting possible with some of the Options which I dont understand?

[mattijs]

If you look at the patches (v.s. the internal mesh) you'll see the outside polyhedra correctly.

OpenDX has the same problem (and uses a similar decomposition) but can display the edges of the mesh correctly

The mesh is not body fitted and there is no option to do so.

[bastil]

Thanks for this, Mattijs. How can I look a the patches in paraview?

So what are the following options good for:

With them I dont see a difference, I always get three cell sets:
selectCut
selectInside
selectOutside

I thought this was for body fitting but whats it good for?
geometricCut false;
UseHexTopology yes;


Thanks Basti

[hartinger]

use foamToVTK, it writes separate files for each patch. use paraview to see the vtk-files

[mattijs]

The cellSets are to select part of the mesh. Use subsetMesh.

The default refinement method is to cut with a plane through the cell centre (geometricCut=true). For pure hexes (i.e. cells with 8 vertices and 6 quad faces) it can do a topological cut (UseHexTopology=true) since for hexes the concept of a direction actually makes sense.