# ParaView Support **URL:** https://discourse.paraview.org/c/paraview-support/7.md?page=113 [Latest](https://discourse.paraview.org/latest.md) · [Categories](https://discourse.paraview.org/categories.md) · [Tags](https://discourse.paraview.org/tags.md) **Page:** 114 --- ## [Loading OpenFOAM decomposed Case takes more than 8 hours](https://discourse.paraview.org/t/loading-openfoam-decomposed-case-takes-more-than-8-hours/6302)
**Author:** [@ANON1](https://discourse.paraview.org/u/ANON1)\ **Replies:** 11\ **Last updated:** [March 18, 2022, 4:40pm UTC](https://discourse.paraview.org/t/loading-openfoam-decomposed-case-takes-more-than-8-hours/6302 "2022-03-18T16:40:37Z")
Hello, I have a very large decomposed OpenFOAM case with (72 processors folders). The size of the case is more than 200GB. I used to use the reconstructPar utility of OpenFOAM to construct only a few timesteps that I ca… --- ## [pvpython scripting in parallel](https://discourse.paraview.org/t/pvpython-scripting-in-parallel/9210)
**Author:** [@Ying](https://discourse.paraview.org/u/Ying)\ **Replies:** 1\ **Last updated:** [March 18, 2022, 4:31pm UTC](https://discourse.paraview.org/t/pvpython-scripting-in-parallel/9210 "2022-03-18T16:31:46Z")
Hi, I use pvpython scripting to convert a bunch of vtk files to png images in paraview. The logic is to: (i) define main function vtkToImg(), which reads one vtk file and save it as one screenshot (.png); (ii) use for… --- ## [Distribution of data for vtu format files](https://discourse.paraview.org/t/distribution-of-data-for-vtu-format-files/9199)
**Author:** [@eve-le-guillou](https://discourse.paraview.org/u/eve-le-guillou)\ **Replies:** 1\ **Last updated:** [March 18, 2022, 4:09pm UTC](https://discourse.paraview.org/t/distribution-of-data-for-vtu-format-files/9199 "2022-03-18T16:09:56Z")
Hello, I use Paraview 5.10 and openMPI 4.0.3. I want to distribute data in vtu format across MPI processes. I can’t seem to work out how it is supposed to distribute the data. Here is an example to show you my problem: … --- ## [How to use python 3 with pvpython](https://discourse.paraview.org/t/how-to-use-python-3-with-pvpython/9215)
**Author:** [@Ying](https://discourse.paraview.org/u/Ying)\ **Replies:** 4\ **Last updated:** [March 18, 2022, 3:21pm UTC](https://discourse.paraview.org/t/how-to-use-python-3-with-pvpython/9215 "2022-03-18T15:21:27Z")
Hi all, pvpython is a python interface to paraview, is it possible to change the python version when using pvpython, like from python 2 to python 3? I use Ubuntu 18.04 + Paraview 5.0.1. Thanks! --- ## [save selected surfaces from ExtractSurface](https://discourse.paraview.org/t/save-selected-surfaces-from-extractsurface/9213)
**Author:** [@S\_Otta](https://discourse.paraview.org/u/S_Otta)\ **Replies:** 3\ **Last updated:** [March 18, 2022, 12:51pm UTC](https://discourse.paraview.org/t/save-selected-surfaces-from-extractsurface/9213 "2022-03-18T12:51:32Z")
I have an Ensight case file which has several domains. After loading the complete file, I used the extract surface filter and then identified a subset of the all the surfaces to save to an STL file. Currently save data s… --- ## [Paraview not loading files other than native to VTK/Paraview](https://discourse.paraview.org/t/paraview-not-loading-files-other-than-native-to-vtk-paraview/9207)
**Author:** [@S\_Otta](https://discourse.paraview.org/u/S_Otta)\ **Replies:** 6\ **Last updated:** [March 17, 2022, 10:07pm UTC](https://discourse.paraview.org/t/paraview-not-loading-files-other-than-native-to-vtk-paraview/9207 "2022-03-17T22:07:41Z")
Paraview (different versions, have tried 5.4 onwards) not loading files other than those native to VTK/Paraview like .vtu .vtp. I am trying to load an Ensight case with all associated files like a CGNS files and other s… --- ## [Version 5.9.1 QCriterion](https://discourse.paraview.org/t/version-5-9-1-qcriterion/9205)
**Author:** [@anthonyegelnjr](https://discourse.paraview.org/u/anthonyegelnjr)\ **Replies:** 2\ **Last updated:** [March 17, 2022, 1:27pm UTC](https://discourse.paraview.org/t/version-5-9-1-qcriterion/9205 "2022-03-17T13:27:00Z")
I have used various versions of ParaView in the past and taken advantage of the “Compute QCriterion” option under the GradientOfUnstructuredDataSet filter. I have recently been working with data sets on a remote server w… --- ## [Probe](https://discourse.paraview.org/t/probe/9194)
**Author:** [@PALANI](https://discourse.paraview.org/u/PALANI)\ **Replies:** 9\ **Last updated:** [March 17, 2022, 11:59am UTC](https://discourse.paraview.org/t/probe/9194 "2022-03-17T11:59:01Z")
I used probe at the first timestep of my data, in spreadsheet view, I didn’t get any values or parameters, but when I used a different time step, the Values with the parametrs are visible. Why is this happening and how d… --- ## [Visualizing sliced scalar field in moving frame of reference](https://discourse.paraview.org/t/visualizing-sliced-scalar-field-in-moving-frame-of-reference/9176)
**Author:** [@Jeremie](https://discourse.paraview.org/u/Jeremie)\ **Replies:** 18\ **Last updated:** [March 17, 2022, 11:11am UTC](https://discourse.paraview.org/t/visualizing-sliced-scalar-field-in-moving-frame-of-reference/9176 "2022-03-17T11:11:30Z")
Hi everyone, I am tackling a rather thorny visualization issue. I have an object moving in a 3D box with periodic boundary conditions and I want to visualize fields around that object as it reaches its steady state (co… --- ## [Error when exporting vtkjs with paraviewGlance html](https://discourse.paraview.org/t/error-when-exporting-vtkjs-with-paraviewglance-html/4309)
**Author:** [@af11g11](https://discourse.paraview.org/u/af11g11)\ **Replies:** 17\ **Last updated:** [March 16, 2022, 11:32pm UTC](https://discourse.paraview.org/t/error-when-exporting-vtkjs-with-paraviewglance-html/4309 "2022-03-16T23:32:45Z")
Hi, When exporting a scene from ParaView for use with ParaView Glance I seem to be running into trouble. My workflow is: exportScene \> “name”.vtkjs \> click cog and select paraviewGlance HTML (save textures had both on &… --- ## [Paraview's 2DC Cylindrical Cell Mass totals not equaling CTH's OCTH or closed form totals.](https://discourse.paraview.org/t/paraviews-2dc-cylindrical-cell-mass-totals-not-equaling-cths-octh-or-closed-form-totals/9201)
**Author:** [@GregC](https://discourse.paraview.org/u/GregC)\ **Replies:** 0\ **Last updated:** [March 16, 2022, 7:19pm UTC](https://discourse.paraview.org/t/paraviews-2dc-cylindrical-cell-mass-totals-not-equaling-cths-octh-or-closed-form-totals/9201 "2022-03-16T19:19:24Z")
I’ll preface this saying a fairly new user to both CTH and ParaView, so I’m leaning towards this being user error and not any issues with the programs. I have a half a circle set up in CTH using the 2DC cylindrical coor… --- ## [paraview python script, doesn't work properly on remote server](https://discourse.paraview.org/t/paraview-python-script-doesnt-work-properly-on-remote-server/9187)
**Author:** [@gv871](https://discourse.paraview.org/u/gv871)\ **Replies:** 3\ **Last updated:** [March 16, 2022, 5:39pm UTC](https://discourse.paraview.org/t/paraview-python-script-doesnt-work-properly-on-remote-server/9187 "2022-03-16T17:39:26Z")
Hello, I have the following python script that runs without problem on my local machine. from paraview.simple import GetSources all\_sources = GetSources() for s\_string,s\_id in all\_sources: source = all\_sources\[s\_s… --- ## [Compute pressure coefficient on the cylinder surface](https://discourse.paraview.org/t/compute-pressure-coefficient-on-the-cylinder-surface/9185)
**Author:** [@xq520](https://discourse.paraview.org/u/xq520)\ **Replies:** 7\ **Last updated:** [March 16, 2022, 3:53pm UTC](https://discourse.paraview.org/t/compute-pressure-coefficient-on-the-cylinder-surface/9185 "2022-03-16T15:53:25Z")
Hello everyone, I want to compute the pressure coefficient on the cylinder wall (the inner cylinder). As can be seen below. The wall contains density, pressure, velocity, I think. Could someone tell me how to get the pr… --- ## [Importing Ansys Fluent results to Paraview](https://discourse.paraview.org/t/importing-ansys-fluent-results-to-paraview/4862)
**Author:** [@Amalesh](https://discourse.paraview.org/u/Amalesh)\ **Replies:** 16\ **Last updated:** [March 16, 2022, 9:12am UTC](https://discourse.paraview.org/t/importing-ansys-fluent-results-to-paraview/4862 "2022-03-16T09:12:05Z")
I’m new to the paraview application I don’t know how to import the results from my Ansys fluent. I don;t know which file format Paraview will support? Pls some give me suggestion to import the results from Ansys to Parav… --- ## [How to add filename as text in the renderview?](https://discourse.paraview.org/t/how-to-add-filename-as-text-in-the-renderview/9179)
**Author:** [@Ying](https://discourse.paraview.org/u/Ying)\ **Replies:** 6\ **Last updated:** [March 16, 2022, 8:28am UTC](https://discourse.paraview.org/t/how-to-add-filename-as-text-in-the-renderview/9179 "2022-03-16T08:28:14Z")
Hi, I have a bunch of vtk files named by simulation time: U\_0.05.vtk, U\_0.10.vtk, U\_0.15.vtk, … Now I want to extract the time in filename, i.e, 0.05, 0.10, 0.15, …, and source → text to renderview, like time=0.05, time… --- ## [Show text field changing every time step from programmable filter](https://discourse.paraview.org/t/show-text-field-changing-every-time-step-from-programmable-filter/1469)
**Author:** [@gromaxe](https://discourse.paraview.org/u/gromaxe)\ **Replies:** 7\ **Last updated:** [March 15, 2022, 9:32pm UTC](https://discourse.paraview.org/t/show-text-field-changing-every-time-step-from-programmable-filter/1469 "2022-03-15T21:32:04Z")
Hello everyone! Now I’m trying to get time in YYYY-MM-DD format for animation via programmable filter ( I still haven’t figured out how to write it to new variable, but i’m working on it). Having a variable same length… --- ## [Ray tracing with volume rendering](https://discourse.paraview.org/t/ray-tracing-with-volume-rendering/4498)
**Author:** [@Gwang-Jin\_Lee](https://discourse.paraview.org/u/Gwang-Jin_Lee)\ **Replies:** 12\ **Last updated:** [March 15, 2022, 2:50pm UTC](https://discourse.paraview.org/t/ray-tracing-with-volume-rendering/4498 "2022-03-15T14:50:43Z")
Hello. I am trying to render my wavefront obj files with netCDF. And I would like to apply the ray tracing to the obj files. But, when I applied the ray tracing with OptiX, the volume-rendered netCDF data disappeared: … --- ## [Macros gets the information of the read file](https://discourse.paraview.org/t/macros-gets-the-information-of-the-read-file/9181)
**Author:** [@flow\_zhang](https://discourse.paraview.org/u/flow_zhang)\ **Replies:** 0\ **Last updated:** [March 15, 2022, 8:40am UTC](https://discourse.paraview.org/t/macros-gets-the-information-of-the-read-file/9181 "2022-03-15T08:40:44Z")
I want to use the macros script to do the same processing for all the read in files. How can I get information from the tree of the pipline browser when I’m not sure about the contents of the file As shown in the fig… --- ## [Calculating Laplacian of scalar field with a Python Calculator filter results in exactly 0 at every point](https://discourse.paraview.org/t/calculating-laplacian-of-scalar-field-with-a-python-calculator-filter-results-in-exactly-0-at-every-point/9165)
**Author:** [@Reed\_Brown](https://discourse.paraview.org/u/Reed_Brown)\ **Replies:** 6\ **Last updated:** [March 15, 2022, 8:14am UTC](https://discourse.paraview.org/t/calculating-laplacian-of-scalar-field-with-a-python-calculator-filter-results-in-exactly-0-at-every-point/9165 "2022-03-15T08:14:57Z")
I have velocity data from a CFD calculation. The data are the values of the x component of velocity (u) and the y component of velocity (v) on a 2D domain. The mesh is non-uniform. I’m trying to calculate the Laplacian … --- ## [Calculate Residence time using Paraview](https://discourse.paraview.org/t/calculate-residence-time-using-paraview/9074)
**Author:** [@oumnion](https://discourse.paraview.org/u/oumnion)\ **Replies:** 15\ **Last updated:** [March 14, 2022, 5:53pm UTC](https://discourse.paraview.org/t/calculate-residence-time-using-paraview/9074 "2022-03-14T17:53:48Z")
Hello, I am trying to calculate the residence time in a TJunction and I was wondering if I could perform that just by post-processing the results using Paraview (without injecting a tracer through scalarTransportFoam) --- ## [Paraview started showing surface roughness, not sure how it happened or what metric is being used](https://discourse.paraview.org/t/paraview-started-showing-surface-roughness-not-sure-how-it-happened-or-what-metric-is-being-used/9175)
**Author:** [@ZhangxiFeng](https://discourse.paraview.org/u/ZhangxiFeng)\ **Replies:** 19\ **Last updated:** [March 14, 2022, 5:24pm UTC](https://discourse.paraview.org/t/paraview-started-showing-surface-roughness-not-sure-how-it-happened-or-what-metric-is-being-used/9175 "2022-03-14T17:24:34Z")
This has never happened before in my many years of using Paraview, but suddenly when I launch the program and opened a VTK file, it showed a model with surface roughness. I checked the initial state of the model and Para… --- ## [How to use VTK Extension filters standalone?](https://discourse.paraview.org/t/how-to-use-vtk-extension-filters-standalone/9166)
**Author:** [@Vishnu-C](https://discourse.paraview.org/u/Vishnu-C)\ **Replies:** 1\ **Last updated:** [March 14, 2022, 1:17pm UTC](https://discourse.paraview.org/t/how-to-use-vtk-extension-filters-standalone/9166 "2022-03-14T13:17:28Z")
Hello all, I am in development of certain functions with help of VTK binaries that I built in VS2019. I would like to use certain filters in VTKExtensions/FiltersGeneral. Is it possible to build only those as a lib? Ple… --- ## [How to deploy a custom app based on ParaView?](https://discourse.paraview.org/t/how-to-deploy-a-custom-app-based-on-paraview/9163)
**Author:** [@Cam](https://discourse.paraview.org/u/Cam)\ **Replies:** 1\ **Last updated:** [March 14, 2022, 7:53am UTC](https://discourse.paraview.org/t/how-to-deploy-a-custom-app-based-on-paraview/9163 "2022-03-14T07:53:46Z")
I am having some troubles to deploy the application (i.e., need to move all relevant ParaView files to target location). Was there a CMake API to do it? --- ## [Numpy package not found in paraview 5.10](https://discourse.paraview.org/t/numpy-package-not-found-in-paraview-5-10/9141)
**Author:** [@Darz](https://discourse.paraview.org/u/Darz)\ **Replies:** 3\ **Last updated:** [March 14, 2022, 7:40am UTC](https://discourse.paraview.org/t/numpy-package-not-found-in-paraview-5-10/9141 "2022-03-14T07:40:24Z")
Hello, I get a run time error when I try to use python calculator filter in paraview 5.10 in ubuntu 20.04. Stating that numpy package is not there in python library. Traceback (most recent call last): File “”, line 2,… --- ## [\[5.10\] How to disable automatic renaming of numbered variables into tensors](https://discourse.paraview.org/t/5-10-how-to-disable-automatic-renaming-of-numbered-variables-into-tensors/9162)
**Author:** [@path](https://discourse.paraview.org/u/path)\ **Replies:** 13\ **Last updated:** [March 14, 2022, 7:39am UTC](https://discourse.paraview.org/t/5-10-how-to-disable-automatic-renaming-of-numbered-variables-into-tensors/9162 "2022-03-14T07:39:46Z")
Is there any way to disable the automatic renaming of numbered variables into tensors (e.g. var1, var2, var3 → var array with X, Y, Z components)? In my field, I work with these types of numbered variables which are stri… --- ## [LIGGTHS questions](https://discourse.paraview.org/t/liggths-questions/9172)
**Author:** [@mabrouka](https://discourse.paraview.org/u/mabrouka)\ **Replies:** 1\ **Last updated:** [March 14, 2022, 7:39am UTC](https://discourse.paraview.org/t/liggths-questions/9172 "2022-03-14T07:39:28Z")
Hi everyone, I ran a tutorial of cfdem, but I could not get results in paraview even if I dump stl or vtk files here are the inputs of liggghts Regards in.liggghts\_resume (2.2 KB) in.liggghts\_init (2.3 KB) --- ## [Spatial averaging over the domain](https://discourse.paraview.org/t/spatial-averaging-over-the-domain/9171)
**Author:** [@RaviGupta](https://discourse.paraview.org/u/RaviGupta)\ **Replies:** 0\ **Last updated:** [March 14, 2022, 7:37am UTC](https://discourse.paraview.org/t/spatial-averaging-over-the-domain/9171 "2022-03-14T07:37:48Z")
Hi, I’m trying to find the domain-wide spatial average of a scalar quantity q. I’m working with a non-uniform grid. The python calculator has a mean option. However, it is stated that it returns the average of the array… --- ## [time average particles velocity](https://discourse.paraview.org/t/time-average-particles-velocity/5231)
**Author:** [@Hossein4142](https://discourse.paraview.org/u/Hossein4142)\ **Replies:** 7\ **Last updated:** [September 15, 2020, 2:59pm UTC](https://discourse.paraview.org/t/time-average-particles-velocity/5231 "2020-09-15T14:59:02Z")
Hi I have .pvd and .vtp files (result of mfix). this files are about particle data. I want to export time average particle y-velocity . how can i do it? --- ## [Laplacian of vector](https://discourse.paraview.org/t/laplacian-of-vector/9144)
**Author:** [@Darshan](https://discourse.paraview.org/u/Darshan)\ **Replies:** 2\ **Last updated:** [March 13, 2022, 3:38pm UTC](https://discourse.paraview.org/t/laplacian-of-vector/9144 "2022-03-13T15:38:27Z")
Hello everyone, I am struggling to calculate the Laplacian of vorticity vector with python calculator filter. However, I didn’t face any problem in calculating the divergence of 2D vectors and gradient of 2D vector and … --- ## [Ellipsoid particle motion](https://discourse.paraview.org/t/ellipsoid-particle-motion/9081)
**Author:** [@kaazem\_Rezaa\_Asl](https://discourse.paraview.org/u/kaazem_Rezaa_Asl)\ **Replies:** 23\ **Last updated:** [March 12, 2022, 6:55pm UTC](https://discourse.paraview.org/t/ellipsoid-particle-motion/9081 "2022-03-12T18:55:35Z")
Dear All, I am currently working on ellipsoid particle tracking using openFoam. I would like to visualize the ellipsoid particles motion in paraview using xyz coordinates, minor & major axis, and orientation. I have all… [Previous page](https://discourse.paraview.org/c/paraview-support/7.md?page=112) [Next page](https://discourse.paraview.org/c/paraview-support/7.md?page=114)