[Paraview] Paraview 3.1.0 - ensight gold problem

[Amy Squillacote]

Hi Adrian,

If you can send us a sample EnSight Gold file that demonstrates this 
problem, we will be glad to look into it.

- Amy

Adrian Magda wrote:
> Hello Paraview users,
>
> I am back with my problem. After more testing i came to a point to 
> believe there might be a bug in processing ensight gold data in paraview.
>
> Again, i will briefly tell my problem. I use ensight gold unstructured 
> grid. I have my geometry organized in two parts:
>    part1 - the inner geometry of the flow, hexa8 elements
>    part2 - the wall boundary condition, quad4 elements, which overlay 
> over one side of the hexa8 elements
>
> Now it seems that Paraview interprets somehow wrong the information 
> provided. On one wall i always have kind of competition between hexa8 
> and quad4 elements. See the first figure in the link provided below.
>
> If i use the "Extract Datasets" filter and display the results only 
> for the part1 containing only the hexa8 and display the temperature 
> profile in a cut inside the geometry i have the expected results. See 
> the second figure in the link below.
>
> If i make a cut trough the entire geometry (part1 +part2) i see a very 
> strange interpolation for the temperature. See the third figure in the 
> link below.
>
> I tested the results in ensight8 and all work as expected so i suppose 
> that there might be a bug in Paraview  ensight gold module.
>
> The link to the results:  
> http://www.schunternet.de/~amagda/cfd/paraview.html
>
> All the best
> Adrian
>
>
>
>
>
>
> http://www.schunternet.de/~amagda/cfd/paraview.html
>
>
> SamuelKey wrote:
>> Hi Adrian,
>>
>> Adrian Magda wrote:
>>> Hi Samuel
>>>
>>> Thanks a lot for your answer.
>>>
>>> Both hex8 and quad4 store temperature as cell data. You are right 
>>> the quad4 elements
>>> are overlaying the hex8 surface.
>>>
>>> If there is only a visual competition between the display from each 
>>> part I think that should not effect the inner flow far from the wall 
>>> no ?
>>
>> It would be my starting assumption that the inner flow far from the 
>> wall  should not be affected. It must be affected or you would not ask?
>>
>>>
>>> For you all this works without problem ?
>>
>> My simulations are for the transient dynamic response of solids. As a 
>> result, I do not look at stream lines, for example.  I do look at 
>> iso-surfaces of velocity; the velocity iso-surfaces always appear 
>> clean, that is, the iso-surfaces I have seen does not appear corrupted.
>>
>>>
>>> All the best
>>> Adrian
>>>
>>> On 9/30/07, *SamuelKey* <samuelkey at comcast.net 
>>> <mailto:samuelkey at comcast.net>> wrote:
>>>
>>>     Greetings Adrian,
>>>
>>>     I use an EnSight Gold format with "parts," unstructured grids, 
>>> multiple
>>>     element types.
>>>
>>>     Is Temperature point or cell data for the hex8 elements?
>>>
>>>     Is Temperature point or cell data for the quad4 elements?
>>>
>>>     In my experience, each "part" is a separate displayable object. 
>>> While
>>>     the nodal points appear "unique" to each "part" in the ParaView 
>>> data
>>>     set, the nodal points have the exact same coordinates since the 
>>> quad4
>>>     are overlaying the hex8 surface (at least, in my data sets they 
>>> would).
>>>
>>>     With quad4's overlaying the hex8 surface being coincident, I 
>>> think you
>>>     may seeing a visual competition between the display from each part?
>>>
>>>     Regards,
>>>
>>>     Sam Key
>>>
>>>     Adrian Magda wrote:
>>>      > Hi all Paraview users,
>>>      >
>>>      > I am using Paraview to plot my cfd results. I am using 
>>> ensight gold
>>>      > binary format. I can write and read the data with no problem, 
>>> but it
>>>      > seems paraview interprets the things wrong.
>>>      >
>>>      > The geometry file is divided in two part one containing the 
>>> internal
>>>      > flow (hexa8, unstructured)  and a part containing the 
>>> boundary file
>>>      > (quad4 unstructured elements).
>>>      >
>>>      > The problem is that always the temperature on the North wall 
>>> of my
>>>      > geometry seems to mixed with data from both hexa8 (first 
>>> elementh
>>>     near)
>>>      > the wall and quad4 element (placed on the hexa8 wall). More 
>>> if i do a
>>>      > cut trough the geometry and display the temperature the 
>>> temperature
>>>      > profile is completely wrong
>>>      > On the other hand if i use "Extract Datasets" option i can 
>>> see the
>>>      > correct Temperature profile on the inner flow and on the 
>>> boundary
>>>     area
>>>      > for each part separately.
>>>      > In order to check out more the encounterdproblem i decided to
>>>     export a
>>>      > simple OpenFOAM 3d case (20*20*20) (the 2d (in one direction 
>>> only 1
>>>      > cell) works with no probblem) and also i noticed strange 
>>> things. For
>>>      > exporting i used the included foamToEnsight module.
>>>      >
>>>      > Last and final try was to check the .case file in ensight8 and
>>>     none of
>>>      > the problems mentioned above were noted.
>>>      >
>>>      >
>>>      > Did anybody else have had such problems ? There is any way 
>>> around
>>>     this?
>>>      >
>>>      >
>>>      > Adrian
>>>      >
>>>      >
>>>      >
>>>      >
>>>      >
>>>     
>>> ------------------------------------------------------------------------ 
>>>
>>>      >
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>>>
>>>
>>>
>>
>
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-- 
Amy Squillacote
Kitware, Inc.
28 Corporate Drive
Clifton Park, NY 12065
Phone: (518) 371-3971 x106