Re: [Paraview] NEK5000 with ParaView

Samuel Key Sun, 02 Mar 2014 10:46:30 -0800

Giuseppe, Ravi;

I have no knowledge of NEK-5000, nor the content of the results files produced by NEK-5000. However, in my use of ParaView, ParaView routinely provides moving and distorting meshes in my animations. For me, there are at least two ways that the moving and distorting meshes are produced:

1) If there are vector displacement values supplied at the grid points, and ParaView's Warp filter is available (that is, not grayed-out), then the Warp filter will can be used with a scale value to reduce, amplify, or give true position of the grid,

2) If one uses the EnSight-formatted simulation results file, and true-scale deformed mesh plots are the routine case, then EnSight's *.geom file can contain by time-step the mesh coordinates, and then without the use of ParaView's Warp filter, true-scale deformed meshes are obtained automatically. A small EnSight *.case file (an ASCII-formatted meta file the points to all of the binary files that contain the simulation results) is attached.

Sam Key

On 3/2/2014 9:16 AM, Ravi Tumkur wrote:

Hello Giuseppe,

Thanks a lot for replying to my query.

I understand that you are also facing the same issue of only one time-step's mesh geometry begin loaded when you try to use Paraview 4.1.0 to visualize your post-processed data.

When you say using Praview 4.1.0 resolved your issue at the beginning of your email, do you mean you were able to visualize *.fld* data in Paraview? If so, can you please send an example database set and the metadata file?

I am trying to visualize moving-mesh results for the basic problem of vortex-shedding past a cylinder moving with prescribed motion. The flow results are rendered as expected in Paraview for each time step, but the mesh appears stationary, corresponding to "firsttimestep", as you also observe too.

I appreciate your help, a set to example database will get me started on using Paraview for visualizing NEK-5000 data.

Regards
Ravi

On Sat, Mar 1, 2014 at 2:45 AM, Giuseppe Pitton <giuseppe.pit...@gmail.com> wrote:

Hello Ravi,
although Paraview 4.1.0 solved my issue, now I am experiencing the same problem you report with some postprocessed data (but I have a fixed mesh). In my opinion this happens when the dataset has mesh information stored on each .f or .fld file. I think Paraview expects to have mesh information only in the first file of the dataset, and it is not behaving well if this is not the case.

I suspect this because if I edit my .nek5000 file and change the value of firsttimestep setting it to n, then Paraview correctly visualizes the data of the n-th time step, but again it cannot display correctly the data of the following timesteps.

I also can share some example dataset if it can help.

Best regards,

Giuseppe

Il giorno 28/feb/2014, alle ore 12:40, Ravi Tumkur ha scritto:

Hello Patrick and Giuseppe,

I am also facing the same issue as Giuseppe did on visualizing the NEK5000 solution data. I have simulated a moving boundary problem using NEK5000, and have the output saved in *.fld* format. When I load the meta file to read the files in Paraview, only one time-step mesh geometry is loaded, whereas the field results of all the time-steps are available in Paraview.

I would appreciate if either of you could suggest any workaround to read the moving mesh geometry which is saved for each time-step of the solution.

I am trying to read my NEK5000 output in version 4.1.0 64-bit Paraview installation. If you want the data files, please let me know, I can send them across.

Thanks in advance for you help.

Sincerely,

Ravi

On Mon, Jan 20, 2014 at 10:44 AM, Patrick O'Leary <patrick.ole...@kitware.com> wrote:

Dear Giuseppe,

Yes I remember the issue. I have a test data set, and I just tested it. It works with version 4.1. Send me your data set and I'll look at what we might have missed.

Best regards,

Patrick

On Mon, Jan 20, 2014 at 8:37 AM, Giuseppe Pitton <giuseppe.pit...@gmail.com> wrote:

Dear Patrick,
I am a ParaView user, and I am experiencing some issues with NEK5000 output format, both with the 4.0.1 and the 4.1 version.
I have found a user already reported this bug, but I have not found any solution online. The problem is that only the first timestep is visualized, and not the following ones. If you want, I could send you an example output (few Mb).
Thank you in advance, best regards.
Giuseppe Pitton

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--
Ravi Kumar T R

University of Illinois at Urbana-Champaign
ph : +1 217 778 7538
http://lndvl.mechse.illinois.edu/

--
Ravi Kumar T R

University of Illinois at Urbana-Champaign
ph : +1 217 778 7538
http://lndvl.mechse.illinois.edu/
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FORMAT
type: ensight gold
GEOMETRY
model:                   1  1  fmaego.data.geom    change_coords_only
VARIABLE
vector per node:         1  1  Displacement          fmaego.data.ndis
vector per node:         1  1  Velocity              fmaego.data.nvel
vector per node:         1  1  Acceleration          fmaego.data.nacc
scalar per element:      1  1  Material              fmaego.data.emat
scalar per element:      1  1  Material-State        fmaego.data.esta
scalar per element:      1  1  Pressure              fmaego.data.eprs
scalar per element:      1  1  Bulk-Strain           fmaego.data.elnv
scalar per element:      1  1  Strain-Energy-Density fmaego.data.esed
scalar per element:      1  1  Effective-Stress      fmaego.data.edev
vector per element:      1  1  Stress*Vel            fmaego.data.estv
tensor symm per element: 1  1  Stress                fmaego.data.estr
TIME
time set:                1
number of steps:       101
time values:                  3.834598830152E-08      2.401878096324E-05
      4.802333661701E-05      7.202733744865E-05      9.603060780258E-05
      1.200334703081E-04      1.440193844955E-04      1.680146693116E-04
      1.920087331618E-04      2.160314533233E-04      2.400079182161E-04
      2.640213665873E-04      2.880240087254E-04      3.120281929425E-04
      3.360323433546E-04      3.600345772931E-04      3.840074809270E-04
      4.080190611593E-04      4.320007322346E-04      4.560295766795E-04
      4.800220744568E-04      5.040203342057E-04      5.280188309469E-04
      5.520166598074E-04      5.760143855699E-04      6.000122688533E-04
      6.240085596331E-04      6.480070867464E-04      6.720056479319E-04
      6.960027377833E-04      7.200376173517E-04      7.440355534888E-04
      7.680318024668E-04      7.920324332121E-04      8.160314570692E-04
      8.400251987439E-04      8.640142273148E-04      8.880327627412E-04
      9.120100537018E-04      9.360202553403E-04      9.600271030627E-04
      9.840357316143E-04      1.008002413328E-03      1.032013951049E-03
      1.056028730736E-03      1.080009043216E-03      1.104037493311E-03
      1.128031325957E-03      1.152028039381E-03      1.176025133838E-03
      1.200023530482E-03      1.224022673862E-03      1.248019319901E-03
      1.272016676701E-03      1.296014746795E-03      1.320038055833E-03
      1.344032619633E-03      1.368030287548E-03      1.392027596328E-03
      1.416023166741E-03      1.440019805083E-03      1.464017463591E-03
      1.488015635409E-03      1.512011697409E-03      1.536007363990E-03
      1.560004310312E-03      1.584006087652E-03      1.608000377206E-03
      1.632029493423E-03      1.656014295656E-03      1.680035421636E-03
      1.704016014469E-03      1.728027135868E-03      1.752001859779E-03
      1.776017340339E-03      1.800031909729E-03      1.824015392980E-03
      1.848001211410E-03      1.872030894971E-03      1.896028040358E-03
      1.920023131457E-03      1.944016145618E-03      1.968009273982E-03
      1.992005559505E-03      2.016036887583E-03      2.040018719952E-03
      2.064009765153E-03      2.088021674319E-03      2.112019455522E-03
      2.136036673259E-03      2.160024661973E-03      2.184015581926E-03
      2.208016996782E-03      2.232006195746E-03      2.256035680689E-03
      2.280025856546E-03      2.304021279069E-03      2.328012554792E-03
      2.352001260625E-03      2.376033276350E-03      2.400024810697E-03
FILE
file set:                   1
number of steps:          101

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Re: [Paraview] NEK5000 with ParaView

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