[OpenFOAM] Can Paraview create tables like in CFD-post (Ansys)?

vasava · October 28, 2016, 05:02

In CFD-post you can make tables for post processing data e.g. maximum, average(volume and area), minimum values of variables across sections and boundaries. Here is an example.

These tables can also be copies to excel for further post-processing and analysis.

Is it possible to make such tables with paraview?

vasava · November 2, 2016, 01:39

I have gone through almost entire help section for paraview and unfortunately it is not possible to make such tables in paraview. I would like to know if someone else thinks otherwise.

There is some respite though as filters (e.g. integral variable) and commands (e.g. patchAverage) can help calculate average of chosen quantities at chosen boundaries.

akidess · November 2, 2016, 02:22

How do you feel about generating the data with OpenFOAM's postprocessing tools instead of Paraview?

vasava · November 2, 2016, 02:25

Quote:

Originally Posted by akidess

How do you feel about generating the data with OpenFOAM's postprocessing tools instead of Paraview?

Do you mean parafoam?

akidess · November 2, 2016, 02:34

No, that's still Paraview. I mean sample, probe, postProcess (functionObjects), swak, ...

vasava · November 2, 2016, 03:13

Quote:

Originally Posted by vasava

Do you mean parafoam?

Thank you for your response. That was indeed a nonsense question.

Yes, I do use swak4Foam and probes for monitoring and post-processing. But most of the times it gets little manual processing each monitor files separately. For example this one case I have has 21 inlet-outlets and about 36 monitor files. It is tedious to process them manually.

I have made some octave programs to process the probe-files rapidly. It helps but I would still like to do same type of post-processing in paraview, if possible. Thats why I was looking for ways to generate CFD-post-like tables directly in paraview.

For now I am trying to learn ways to use paraview more efficiently. The idea was to make state files (that includes CFD-post-like tables) that work for identical/similar cases. This is to generate same results for multiple cases eliminating all the repetitive/manual work.

Right now I am reading about filters to get more help and see if there is workaround.

vasava · November 2, 2016, 03:20

By the way, do you have any experience with VTK?

akidess · November 2, 2016, 03:23

With python scripting, you may be able to get what you want in Paraview. But as far as the CLI tools go, why would you even consider postprocessing anything manually, especially for that number of files? Since the files are easily readable, automating your postprocessing with Python, Octave or whatever is fairly simple.

vasava · November 2, 2016, 03:43

You are right about postprocessing with Octave. I always use it extensively whenever I want to do quantitative analysis. Using Octave has made my life very simple.

Unfortunately I dont know anything about python scripting or any other programming language in that matter. The only thing I am good at is Matlab and I am using that knowledge for making Octave programs.

I used term 'manual' to compare my paraview skills with cfdpost. I think I am still quite far.

Thanks for your comments!!

vasava · November 3, 2016, 02:01

While we are on this topic, do you know if there is a way to append monitor files in openFoam? Every time I interrupt simulation, a new time-directory with new monitor files is generated.

Again, I deal with this with Octave program but it would be nice to have only one single datafile for each monitor.

I created a post in February but no one has responded. I guess it is impossible.

October 28, 2016, 05:02	Can Paraview create tables like in CFD-post (Ansys)?	#1
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 22	In CFD-post you can make tables for post processing data e.g. maximum, average(volume and area), minimum values of variables across sections and boundaries. Here is an example. These tables can also be copies to excel for further post-processing and analysis. Is it possible to make such tables with paraview?

November 2, 2016, 02:22		#3
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	How do you feel about generating the data with OpenFOAM's postprocessing tools instead of Paraview? __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

November 2, 2016, 02:34		#5
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	No, that's still Paraview. I mean sample, probe, postProcess (functionObjects), swak, ... __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

November 2, 2016, 03:23		#8
akidess Senior Member Anton Kidess Join Date: May 2009 Location: Germany Posts: 1,377 Rep Power: 29	With python scripting, you may be able to get what you want in Paraview. But as far as the CLI tools go, why would you even consider postprocessing anything manually, especially for that number of files? Since the files are easily readable, automating your postprocessing with Python, Octave or whatever is fairly simple. __________________ On twitter @akidTwit Spend as much time formulating your questions as you expect people to spend on their answer.

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November 2, 2016, 01:39		#2
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 22	I have gone through almost entire help section for paraview and unfortunately it is not possible to make such tables in paraview. I would like to know if someone else thinks otherwise. There is some respite though as filters (e.g. integral variable) and commands (e.g. patchAverage) can help calculate average of chosen quantities at chosen boundaries.

November 2, 2016, 03:20		#7
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 22	By the way, do you have any experience with VTK?

November 2, 2016, 03:43		#9
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 22	You are right about postprocessing with Octave. I always use it extensively whenever I want to do quantitative analysis. Using Octave has made my life very simple. Unfortunately I dont know anything about python scripting or any other programming language in that matter. The only thing I am good at is Matlab and I am using that knowledge for making Octave programs. I used term 'manual' to compare my paraview skills with cfdpost. I think I am still quite far. Thanks for your comments!!

November 3, 2016, 02:01		#10
vasava Senior Member Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 732 Rep Power: 22	While we are on this topic, do you know if there is a way to append monitor files in openFoam? Every time I interrupt simulation, a new time-directory with new monitor files is generated. Again, I deal with this with Octave program but it would be nice to have only one single datafile for each monitor. I created a post in February but no one has responded. I guess it is impossible.