Append results of each loadstep to the RMED file for Paraview

ParaView Support
1

Hello!

I’m using Paraview on Salome-Meca 2019. And I use Code Aster for the simulations. But this is a question about post-processing.
My simulation consists in using a loop to move a heat load. Currently, I save each result in the same file, as shown below.

DEFI_FICHIER(ACCES='NEW',
                ACTION='ASSOCIER',
                FICHIER='my_path/results.rmed',
                TYPE='LIBRE',
                UNITE=80)

for i in range(1,(ng-1)):
.                                       
 rter[i] = THER_NON_LINE(CHAM_MATER=fmat,
                         CONVERGENCE=_F(ITER_GLOB_MAXI=50,
                            RESI_GLOB_RELA=1e-04),
                         ETAT_INIT=_F(EVOL_THER=proj[i-1]),
                         EXCIT=(_F(CHARGE=(load[i],)),
                                _F(CHARGE=bcs)),        
                          METHODE='NEWTON_KRYLOV',                   
                         INCREMENT=_F(LIST_INST=lt[i]),
                         MODELE=model)

IMPR_RESU(RESU=_F(RESULTAT=rter[i]),
          UNITE=80)

proj[i] = PROJ_CHAMP(MODELE_1=model,
                   MODELE_2=model,
                   PROJECTION='OUI',
                   RESULTAT=rter[i])
...
FIN()

In this way, I have only one file, and the results to be plotted appear as shown in the attached figure.

fig1
fig1814×270 36.7 KB
.
As you can see in the figure, for each RTER my time goes from 0.0 to 0.25. When in fact, rter_1 goes from 0.0 to 0.25, rter_2 goes from 0.25 to 0.50 and so on. This way, I can’t make an animation that shows the entire simulation time. I have to view each RTER separately.

Is there a better way to save the results in Aster, so that each iteration is added with its respective time to the results file? Or is there a way to loop through all of RTER results in Paraview?

Thanks for any insight!

2

I’m afraid this is a MEDReader specific question, said MEDReader is developped by the Salome/ParaVis team, not by ParaView.

1 Like
3

Thanks Mathieu!

I understand that is another viewer. I left a post on the Aster post-processing forum a few weeks ago, but despite several views, no one has yet responded.

As I understand it, the only difference between Paraview and Paravis is just the MEDreader, the rest of the software is mostly identical.

Regarding my left figure, its not possible to loop trough rter_0_TEMP to rter_2_TEMP in a animation?
My data blocks appear as below.

fig1
fig1376×525 36.7 KB

fig2

Given my dataset Information and Properties, can you point a direction that may help, as the question seems to be independent of the viewer? Maybe using a ProgrammableFilter I can create some kind of loop for the animation? Or join my data in only one block?

Anyway, thanks for the clarification!

4

This is correct>

Regarding my left figure, its not possible to loop trough rter_0_TEMP to rter_2_TEMP in a animation?
My data blocks appear as below.

While doable, this is not a trivial operation.

I think the MEDReader support a time mode, maybe this can fix it ?

If not, here is how you can do it:

  1. Open your file with ParaView
  2. Add a PassArray filter, select retr_0_ array only, Apply
  3. Add a calculator filter, select reter_0_ as a formula
  4. Save output as yourFile_0.vtm
  5. Repeat step 2 to 4 with 1 and 2
  6. File-> Open yourFile_*, Apply
  7. Animate
1 Like
5

Thanks Mathieu!

I think I understand what you’re trying to do with the results. Unfortunately, I think Paraview did not save as we would like. When I try to open as you instructed, the following appears:

paraview2
paraview2995×724 149 KB

So, if I open one of the 3 main .vtm files, it opens the same thing I had.

Following steps 2 trough 4, I saved as myfile_0.vtm, myfile_1.vtm and myfile_2.vtm.
This is my pipeline:

paraview3

While saving, I checked the “write timesteps” box below:

paraview

Did I do something wrong? It seems a matter of adapting the nomenclature so that paraview sees only one main .vtm.

Thanks!

6

Hi Mathieu!

I was able to follow your steps, making a modification in the “file name suffix” field when saving the data. However, the problem seems to be with the saved time indexes. Each ‘rter’ is saved with same indexes as shown in the figure below:

fig

Checking a way to change the time indexes of the results, I found the following post, talking about Paraview .PVD files. Would it be possible to do something using this approach? Perhaps it is possible to apply the desired “Dataset timestep” to each file generated by your step by step?

fig2

7

Yes, you can use either .pvd file or .series file