[Paraview] Paraview 3.1.0 - ensight gold problem

[Adrian Magda]

Hello,

The case is a bit big 9 MB and the link to it is 
http://www.schunternet.de/~amagda/cfd/Paraview-ensight.tar.gz
Please let me know if you can download the tar file. Please confirm if 
you see the same behavior  and eventually if there is a way to solve 
this. Just as an additional information I posted also my fortran 
subroutines I use to write data in Ensight gold format.

Best regards
Adrian


Amy Squillacote wrote:
> 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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