[petsc-users] Doubt about TSMonitorSolutionVTK

[MIGUEL MOLINOS PEREZ]

Dear Matthew, thank you. That makes much more sense. Is the script you mention available for download?

Thanks,
Miguel

On Jul 1, 2024, at 5:09 AM, Matthew Knepley <knepley at gmail.com> wrote:

On Mon, Jul 1, 2024 at 1:43 AM MIGUEL MOLINOS PEREZ <mmolinos at us.es<mailto:mmolinos at us.es>> wrote:
Dear Matthey,

Sorry for the late response.

Yes, I get output when I run the example mentioned by Barry.

The output directory should not be an issue since with the exact same configuration works for hdf5 but not for vtk/vts/vtu.

I’ve been doing some tests and now I think this issue might be related to the fact that the output vector was generated using a SWARM discretization. Is this possible?

Yes, there is no VTK viewer for Swarm. We have been moving away from VTK format, which is bulky and not very expressive, into our own HDF5 and CGNS. When we use HDF5, we have a script to generate an XDMF file, telling Paraview how to view it. I agree that this is annoying. Currently, we are moving toward PyVista, which can read our HDF5 files directly (and also work directly with running PETSc), although this is not done yet.

  Thanks,

     Matt

Best,
Miguel

On Jun 27, 2024, at 4:59 AM, Matthew Knepley <knepley at gmail.com<mailto:knepley at gmail.com>> wrote:

Do you get output when you run an example with that option? Is it possible that your current working directory is not what you expect? Maybe try putting in an absolute path.

  Thanks,

    Matt

On Wed, Jun 26, 2024 at 5:30 PM MIGUEL MOLINOS PEREZ <mmolinos at us.es<mailto:mmolinos at us.es>> wrote:
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Sorry, I did not put in cc petsc-users at mcs.anl.gov<mailto:petsc-users at mcs.anl.gov> my replay.

Miguel

On Jun 24, 2024, at 6:39 PM, MIGUEL MOLINOS PEREZ <mmolinos at us.es<mailto:mmolinos at us.es>> wrote:

Thank you Barry,

This is exactly how I did it the first time.

Miguel

On Jun 24, 2024, at 6:37 PM, Barry Smith <bsmith at petsc.dev<mailto:bsmith at petsc.dev>> wrote:


   See, for example, the bottom of src/ts/tutorials/ex26.c  that uses -ts_monitor_solution_vtk 'foo-%03d.vts'


On Jun 24, 2024, at 8:47 PM, MIGUEL MOLINOS PEREZ <mmolinos at us.es<mailto:mmolinos at us.es>> wrote:

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Dear all,

I want to monitor the results at each iteration of TS using vtk format. To do so, I add the following lines to my Monitor function:

char vts_File_Name[MAXC];
PetscCall(PetscSNPrintf(vts_File_Name, sizeof(vts_File_Name),
"./xi-MgHx-hcp-cube-x5-x5-x5-TS-BE-%i.vtu", step));
PetscCall(TSMonitorSolutionVTK(ts, step, time, X, (void*)vts_File_Name));

My script compiles and executes without any sort of warning/error messages. However, no output files are produced at the end of the simulation. I’ve also tried the option “-ts_monitor_solution_vtk <filename-%03D.vts>”, but I got no results as well.

I can’t find any similar example on the petsc website and I don’t see what I am doing wrong. Could somebody point me to the right direction?

Thanks,
Miguel





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