[Paraview] extract surface of multiblock mesh

[Paul Edwards]

Hi Chris,

Use the "Clean to Grid" filter to merge all the duplicate points before
extracting the surface.  So,

    MergeBlocks->Clean to Grid->ExtractSurface->FeatureEdges->Clip

Regards,
Paul

2009/3/27 Chris Kees <christopher.e.kees at usace.army.mil>

> Hi,
>
> I would like to extract the surface mesh of a 3D tetrahedral mesh and clip
> off one boundary to see what is inside. This is to visualize a flow
> simulation around an object inside a tank.  The tetrahedral mesh is
> partitioned into 512 subdomains so if you look in the information viewer you
> see
> Multiblock-DataSet
>        Block 0
>                0: UnstructredGrid
>                ...
>                511: UnstructuredGrid
>
> So far I've tried MergeBlocks->ExtractSurface->FeatureEdges->Clip and
> various permutations that I've seen in previous posts and the wiki, but I
> always end up with the  surfaces on the interior of the tank as if it still
> sees each subdomain as a closed surface.  I'm sure people do this all the
> time, but I can't seem to get it right. I'm wondering if I've written the
> data incorrectly so there is no simple way for paraview to eliminate
> internal processor boundaries from the domain.
>
> Chris
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