[karma15]

Hi Everyone,

I am in the process of using pvpython from Paraview for my post-processing needs. While I have used the python tracer in Paraview to learn exactly what commands I will need for pvpython script, I am just getting stuck with what I think is the OpenFOAM case loading (i.e. transition from using the 'paraFoam' command to loading my OpenFOAM case data using pvpython).

Thus, can someone possibly guide me on what these steps would look like. I have been looking through other forum threads, but still can't seem to find the exact answer.

I was looking at this thread, and it looks like this is the command I should use:

cfd_OpenFOAM = PV3FoamReader( FileName='/home/cfd/cfd.OpenFOAM' )

but my question is what is the name of my actual version of the "cfd.OpenFOAM" file?

Or should I be using the

foamToVTK

utility?

Thanks for your help.

Sincerely,
Sara

[JensD]

Hi Sara,

I have just started to do some basic scripting with the trace function, so I am not an expert on this, but you can just create a blank file (e.g. cfd.OpenFOAM, case.OpenFOAM, ... ) and place it in the simulation folder.

Opening VTK files should be a bit faster as this is native to paraview, however IMO for big cases it takes longer to convert the case to VTK format than the gain on loading in paraview.

Let me know if this helps you somewhat.

Sincerly,
Jens

[karma15]

So what does the beginning of your pvpython script look like?

The issue I am having is that when I do the trace method, the data is already loaded (via paraFoam command). But when I try to strictly run it via pvpython, I am having trouble determining which commands to use to actually load the data.

Thanks for your help.

[JensD]

The beginning is pretty straight forward

try: paraview.simple
except: from paraview.simple import *
paraview.simple._DisableFirstRenderCameraReset()

case_foam = OpenFOAMReader( FileName='/home/path/case.foam' )

You can also just start the trace function before loading your data, load the data selecting which fields you want, and the trace will give you the script to load the case and the selected fields.