[Paraview] Triangulation of Mesh

[Utkarsh Ayachit]

Can you share a sample dataset to help reproduce the issue?

Thanks
Utkarsh

On Fri, May 31, 2013 at 8:59 AM, Gamble, Kyle <gamblek at aecl.ca> wrote:
> UNRESTRICTED | ILLIMITÉ
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> Hello All,
>
>
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> I am trying to understand why when I use show with surface with edges I am
> getting bizarre results.  I have used a program called cubit to create an
> exodus file of my mesh on my local machine with quad8 (quadratic) elements.
> To explain the behaviour, I have created a simple case called junk. When I
> open this exodus file (without results) into Paraview  on my local machine I
> obtain the mesh shown in the attached image JunkParaviewLocal.jpg.
>
>
>
> Now, I run my simulations remotely to another computer used by someone else
> because it is faster than the computer I currently use locally.  This is
> done through linux and ssh. If I secure copy the same exodus file to the
> remote machine and open it in Paraview on the remote machine I obtain the
> mesh shown in ParaviewJunkRemote.jpg, which is obviously the incorrect
> representation of the mesh.  I’ve run the simulation assuming the
> triangulation was just a graphics issue but the results were based upon the
> triangular mesh which is incorrect.
>
>
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> Why does paraview triangulize the mesh when running remotely?  I ask this
> because if I run the simulation using the mesh from this exodus file, I
> obtain results based on the triangular mesh rather than the quadrilateral
> mesh I designed, and this leads to incorrect results.
>
>
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> I thought it may be an issue with the copying of the file so I went to the
> remote machine with the exodus file on a usb key and copied the file to the
> hard drive.  I tried opening the file locally on the remote machine and when
> I click surface with edges, Paraview immediately exits with a seg fault.
>
>
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> Why would paraview exit with a seg fault when clicking surface with edges,
> when the exodus file opens fine on my local machine?  In addition other
> exodus files open perfectly fine in Paraview on the remote machine
> indicating to me there is nothing wrong with the installation of Paraview
> either.
>
>
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> Again this seems like unusual behaviour and I need to be able to run my
> simulations on the remote computer on the correct mesh.  I do not experience
> this behaviour using first order quad4 elements.
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> If anyone has any ideas on why this behaviour is observed and how to correct
> it would be greatly appreciated.
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> Thank you,
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> Kyle Gamble
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