[Paraview] adaptively refined unstructured mesh

[Andy Bauer]

Hi Manav,

Currently there is no way to do this in parallel as VTK doesn't have the
concept of a hanging node. Thus when a cell looks to see if there is a
neighbor on its side it sees if any other cell's sides matches those same
points. If no other cell's sides has those same set of points then it
assumes that it's a boundary. Also, we can't do it by an "external"
technique as then we wouldn't pick up interior boundaries such as holes in
the domain.

To do what you want you'd need to break the cells that have a hanging node
in the middle of the cell's side into triangles or tets and get rid of the
hanging nodes.

Andy


On Sun, Mar 31, 2013 at 11:06 PM, Manav Bhatia <bhatiamanav at gmail.com>wrote:

> Hi,
>
>    I have an unstructured mesh dataset with adaptively refined mesh that I
> am attempting to visualize with Paraview.
>
>    One of the most common operations that I do is the use of Feature Edges
> to get the domain boundaries, so that I can extract that dataset for
> various purposes. This works fine with a mesh that has not been refined.
>
>     The problem that I am facing is that the element edges with hanging
> nodes are being treated as boundaries, which is messing up this procedure.
> Using Feature Edges also includes the element edges with hanging nodes. Is
> there a way to tell Paraview to include only the external boundaries in
>  this case?
>
> Thanks,
> Manav
>
>
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