[Paraview] Native OpenFOAM reader for ParaView 5.3.0 has some weird visualization issues.

[Tom Fahner]

Hi Mark,

I have no polyhedral cells (hybrid tetrahedron/prism mesh), so I guess
changing "decompose polyhedral on/off" does not make sense. In fact the
smaller mesh that I tested with before did show the correct visualization
and that mesh had polyhedral/hexagonal cells. It did not matter whether I
used decompose polyhedral on/off. I also have experienced the slicing
issues from time to time with various paraview versions with polyhedral
meshes, but the effect was typically much less severe than in the current
situation.

Using foamToVTK (with and without the -poly option) does indeed work and
provides the correct visualization. So yes this can be a workaround for
now, but I than rather go back to 5.1.2.

Regards,
Tom

2017-03-16 11:44 GMT+01:00 Mark Olesen <Mark.Olesen at esi-group.com>:

> Hi Tom,
>
> Sorry, no answers - only questions/ideas:
>
> Is decompose polyhedral on or off? How do things look using the other
> setting?
> If the number of cells corresponds to checkMesh - then you either have no
> polyhedra, or decompose polyhedral is off.
> If you use foamToVTK (with and without -poly) and then read the VTK file
> back in, how does that compare?
> Using foamToEnsight could be yet another check, but without the option to
> decompose polyhedra.
>
> In most paraview versions I've had issues with slicing through polyhedron
> (eg, from the motorBike tutorial).
> The symptoms are either holes in the visual (like you have) or crashing
> the program. I haven't checked if this is better/worse in 5.3.0.
>
> Cheers,
> /mark
> ________________________________________
> From: ParaView <paraview-bounces at paraview.org> on behalf of Tom Fahner <
> tom.fahner at gmail.com>
> Sent: Thursday, March 16, 2017 9:39:49 AM
> To: ParaView
> Subject: [Paraview] Native OpenFOAM reader for ParaView 5.3.0 has some
> weird visualization issues.
>
> Dear all,
>
> Please find attached two images that show my OpenFOAM model in ParaView
> 5.3.0. It was the standard Binary Installers package downloaded from the
> website for 64 bit linux (OpenSUSE Leap 42.1).
>
> The correct number of cells is reported in the information tab (when
> compared to OpenFOAM's checkMesh result). The patches are
> all rendered nicely, but it looks like some cells are missing in the
> domain/volume.
>
> Is there some setting that I need to apply?
>
> Please note that the mesh has about 25.8 million cells, for smaller meshes
> this was not a problem. A colleague had similar issues.
> ParaView version 5.1.2 did not have this problem, ParaView 5.2 was not
> able to open the OpenFOAM files at all.
>
> Best regards,
> Tom
>
> --
> T.C. Fahner
> e: tom.fahner at gmail.com<mailto:tom.fahner at gmail.com>
>
>


-- 
T.C. Fahner
e: tom.fahner at gmail.com
t: +31-6-52642814
a: Groene Woud 48
    4834 BC Delft
    Netherlands
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