Problem with VTXWriter. How to read the results in Paraview

dolfinx
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1

Hello everyone,

I am quite new to fenicsx. I am trying to make VTKWriter work. I am using ubuntu 22.04 and dolfinx version 0.7.2 . I installed fenicsx using

conda create -n fenicsx-env
conda activate fenicsx-env
conda install -c conda-forge fenics-dolfinx mpich pyvista

I am using the Poisson equation tutorial as it is from Poisson equation tutorial.

Because of the last lines in the tutorial:

#external post processing
from dolfinx import io
from pathlib import Path
results_folder = Path("results")
results_folder.mkdir(exist_ok=True, parents=True)
filename = results_folder / "fundamentals"
with io.VTXWriter(domain.comm, filename.with_suffix(".bp"), [uh]) as vtx:
    vtx.write(0.0)
with io.XDMFFile(domain.comm, filename.with_suffix(".xdmf"), "w") as xdmf:
    xdmf.write_mesh(domain)
    xdmf.write_function(uh)

I get the following files. xdmf files are fine.
Screenshot from 2023-12-12 16-26-08

But the following files are generated in the .bp folder.
Screenshot from 2023-12-12 16-27-22

How to open this data in Paraview? There are multiple options and I was unable to open it until now.

Screenshot from 2023-12-12 16-29-01
Screenshot from 2023-12-12 16-29-01505Ă—523 56.3 KB

2

You need to have a somewhat recent version of Paraview to open the bp folder. Just go to the website of paraview and download the most recent one, and then try again.

3

You should not go into the directory “fundamentals.bp”.

You should select only the directory called “fundamentals.bp” then select ADIOSVTXWRITER one. (probably the second in options.)

4

Thank you very much :slight_smile: . That was the issue.

5

Thanks for the suggestion :slight_smile: . I was using 5.10 but updated it to 5.12 now. Works in both of them following the solution by @Ekrem_Ekici .

6

Hi dear all,

I have updated my dolfinx version (0.7.2) and wanted to do so with paraview(5.9.0).
Because I found that I cannot visualize the plot of https://fenicsproject.discourse.group/t/solving-stokes-equation-with-newtonsolver/12892/4?u=mamadou.

I go to the website and download (https://www.paraview.org/paraview-downloads/download.php?submit=Download&version=v5.12&type=binary&os=Linux&downloadFile=ParaView-5.12.0-RC1-MPI-Linux-Python3.10-x86_64.tar.gz.

Please let me know how to download it?

Thank you for your time and patience.

7

It is a zip file, download it, unzip it, and use the binary in name_of_folder/bin/paraview

1 Like
8

Thank you very much.