[Paraview] Extracting boundary regions

[Berk Geveci]

Wouldn't extract surface -> clip work? You may need 6 clip filters
now. We are going to add the functionality of clipping with a box back
in soon. You also be able to use the selection stuff. Select the cells
and extract them maybe?

-berk


On Wed, Apr 9, 2008 at 12:09 PM, Renato N. Elias <rnelias at nacad.ufrj.br> wrote:
>
>  I'm looking for a way to extract boundary regions from solid unstructured
> meshes (tetrahedra). The purpose of this is simple: use ParaView to set
> boundary conditions for a CFD code. In PV 2.6.2 I'm able to extract plane
> aligned regions using the following pipeline: (as an example, let's consider
> I'm extracting those boundary nodes lying on the maximum X coordinate:)
>
>  Unstructured mesh (tetrahedra) --> Extract surface --> Calculator (get
> coords_0 scalar per point values) --> Threshould (Scalars = Result of the
> calculator filter, Lower and Upper set to the maximum value).
>
>  Ok, it works just fine. My problem is regarding non aligned boundaries.
> Here is an example of what I'm trying to do
> http://www.nacad.ufrj.br/~rnelias/paraview/regions.jpg . In this example, I
> can extract the plane boundary regions but I can't extract the cylinder at
> the middle of the domain. Any idea?
>
>  Regards
>
>  Renato.
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