[ehsanshams]

hi,

I have probe data from my simulation. Does anyone know what application opens the vector data (U)? or any application that can convert it to tecplot format?
here is the format of the data:

# x -3.5 -2 -1
# y 0.0333 0.0333 0.0333
# z 0 0 0
# Time
1000.1 (0.0346853 0.00264113 -0.00438583) (0.045667 -0.0254756 -0.00883625) (0.0479257 -0.00194718 -0.00995854)
1000.2 (0.0346853 0.002646 -0.00437969) (0.0461788 -0.0248685 -0.00900286) (0.0482703 -0.00188878 -0.0105974)
...


Thank you

[fs82]

You found a solution for your problem? If not I wrote a pyhton script which reformats the probes of openfoam and write a tecplot file. It is not very handy and fast, because it was my first experience with pyhton but it works. So if you need it, I could provide it to you.

kind regards,
Fabian

[owayz]

Hi Fabian,
Can you send me that code.
Would I be able to extract the data over time for specified point from the techplot file? (I have no previous experince with techplot file thats why I ask it)

Regards,
Awais

[fs82]

Hi Awais,

no problem, here it is

[fs82]

I found a big bug in my python script. I don't no if you experience it but if you have time values twice in your probe data the script fails. I tried to fix the bug, but the source code of the script was to creepy. I decided to wrote it completely new.

kind regards,
Fabian

[ehsanshams]

hey Fabian
thanks for updating the file, I'll check it out

[palmerlee]

Hi, Fabian!

Could you please give more details about how to use this script? That'll be very helpful for learners like me.

hpc@node12:~/OpenFOAM/lyp/rD5Re4400_7h$ python newFoamProbeToTecplot
Traceback (most recent call last):
File "newFoamProbeToTecplot", line 7, in <module>
import numpy
ImportError: No module named numpy

kind regards,
Peter

[linyanx]

Originally Posted by palmerlee

Hi, Fabian!

Could you please give more details about how to use this script? That'll be very helpful for learners like me.



kind regards,
Peter

Hi Peter,

I wonder have you figured this code out, I'm also curious about the utilization of this code but find hard time understand this.

Best,
Linyan

[fs82]

To be honest I do not use this script anymore, since I discovered, that it is possible to use gnuplot to plot the probes

plot <file> u 1:2 " %lf (%*lf %*lf %*lf)" w l title 'your title'

Nevertheless, a word on this question

hpc@node12:~/OpenFOAM/lyp/rD5Re4400_7h$ python newFoamProbeToTecplot
Traceback (most recent call last):
File "newFoamProbeToTecplot", line 7, in <module>
import numpy
ImportError: No module named numpy

This is very simple. You have to install a add-on for python called numpy http://www.numpy.org which includes various functionality for scientific usage. If you are using ubuntu it is just "apt-get install python-numpy" and your done.

Best regards
Fabian

[linyanx]

Originally Posted by fs82

To be honest I do not use this script anymore, since I discovered, that it is possible to use gnuplot to plot the probes

plot <file> u 1:2 " %lf (%*lf %*lf %*lf)" w l title 'your title'

Nevertheless, a word on this question

This is very simple. You have to install a add-on for python called numpy http://www.numpy.org which includes various functionality for scientific usage. If you are using ubuntu it is just "apt-get install python-numpy" and your done.

Best regards
Fabian

Hi Fabian,

Thanks for your information, it works!

However, I have a confusing question about the function of the probe in the postProcess package. How to specify the probeLocations while using 'postProcess -func probes' command?

I want to probe a specific point after simulation. The problem is the system/probesDict which contains specified location and fields information cannot be recognized by the system while I command 'postProcess -func probes'. Instead, it just probes out the point (0,0,0) and field p and U which is by default. I know it must be some tiny points that I've ignored. I haven't either found by google or by the forum post about the specific procedures regarding using the 'postProcess -func probes'.

Could you see what's wrong with the way I did with the probe function?

Best,
Linyan

[fs82]

I tried it and it worked well. Just add a probe to your controlDict

functions
{
    probes
    {
        type            probes;
        libs ("libsampling.so");
        writeControl    timeStep;
        probeLocations
        (
            (x y z)
        );
        fields
        (
            U
        );
    }
}

and execute

postProcess -func probes

.
Works perfectly and gives you the result in postProcessing/probes/<time>.

[fs82]

Ok sorry it is not working. I was too fast. However, check the information on the CFDDirect Homepage https://cfd.direct/openfoam/user-gui...hs-monitoring/ this works fine.

[linyanx]

Originally Posted by fs82

Ok sorry it is not working. I was too fast. However, check the information on the CFDDirect Homepage https://cfd.direct/openfoam/user-gui...hs-monitoring/ this works fine.

Fabian,

You made my day! It works. This link illustrates the exact way to probe at the specific location.

Thanks,
Linyan

[sitajeje]

Hi Fabian,

Perhaps I made some basic mistakes. I followed the link you posted by copying the "probes" file into "system" folder, and add functions {#includeFunc probes} into "controlDict". After I ran the postProcess -func probes, one "postProcessing/probes" folder was created. However the data was not saved in one single file, but different time folders were created, where the "U" file with one single data for the corresponding time was saved. I ran also pimpleDyMFoam -postProcess, but nothing happened, the #includeFunc seemed to be absent.

I would appreciate if you could give me some suggestions, thank you very much in advance!

Best regards,

sitajeje

[fs82]

The instruction at this page https://cfd.direct/openfoam/user-gui...hs-monitoring/ are really good and work perfectly, as long as you are using the Foundation Release (no + and no extend) greater than 4.0.

Best regards
Fabian

[sitajeje]

Dear Fabian,

I tried with tutorial cases, and found that the "probes" works as the user guide describes for "cavity" and "pitzDaily". For "mixerVesselAMI2D" it functioned as in my case. This problem might be related to the *DyM* solver.

sitajeje