[Paraview] cannot get streamlines on unstructured meshes

[Berk Geveci]

If you have voxels that are not voxels (i.e. they are warped), the
interpolation is likely to fail. As Ken said, you should use hexahedra
instead. Having said that, is there a reason why you are not using a
structured grid (i.e. curvilinear grid)? It looks like the data is
structured. A structured grid would be much more efficient
memory-wise.

-berk

On Mon, Jan 4, 2010 at 5:05 PM, Moreland, Kenneth <kmorel at sandia.gov> wrote:
> It looks like your mesh comprises voxel elements instead of hexahedral
> elements.  I guess voxel elements are not really well supported in
> unstructured grids (you are supposed to use hexahedra instead).  How did you
> create this data set?  Did you start with a structured grid and convert it
> to an unstructured grid?
>
> -Ken
>
>
> On 12/29/09 6:18 PM, "Georg Stadler" <georgst at ices.utexas.edu> wrote:
>
> Hi,
>
>         While all paraview features work perfectly fine for my
> unstructured mesh output, I cannot get streamlines to show up (or they
> are too small to see). This only happens on warped geometries -- if the
> geometry is a Cartesian box, everything works.
> I've tried the CleanToGrid feature to align nodes and avoid holes due to
> roundoff in the mesh, but not had any success.
> It must be some simple problem, for instance caused by not perfectly
> aligned elements, but I do not see the problem. I'd highly appreciate
> any hint.
>
> Here is a small test example where I have the problem (I use v3.4 but
> have tried other versions as well)
> http://users.ices.utexas.edu/~georgst/files/chunk_velocity.vtu
>
>
> Thanks everybody,
>
> georg
>
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>    ****      Kenneth Moreland
>     ***      Sandia National Laboratories
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