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-   -   Finding velocity temperature etc at a particular pt in space (http://www.cfd-online.com/Forums/openfoam-solving/58155-finding-velocity-temperature-etc-particular-pt-space.html)

srinath June 7, 2008 22:54

Hi Suppose i have finished
 
Hi

Suppose i have finished a foam run, and am interested in values at a few spatial locations, how would i extract these from the output?

Thanks
Srinath

gschaider June 8, 2008 05:12

During the simuation you can d
 
During the simuation you can do that using the probes-functionObject (have a look at $FOAM_TUTORIALS/oodles/pitzDaily/system/controlDict for an example).

I have never tried this, but I think that you can use the same mechanism to do it after the simulation. Just add the entries to the controlDict and run a postprocessing-utility that loads the fields you are looking for into memory (Mach or something like that)

Bernhard

srinath June 8, 2008 21:23

Thanks Bernhard I added the
 
Thanks Bernhard

I added the lines to the control dict and i get the runtime information.
I would ideally like to extract information at particular spatial co-ordinates even after the run is completed. I am not very familiar with manipulating IO objects. Could someone tell me how i should go about it?

Thanks
Srinath

ngj June 9, 2008 03:45

Hi Srinath There is a tool
 
Hi Srinath

There is a tool which you might would take a look at. It is called 'sample' and lives in

~/OpenFOAM/OpenFOAM-1.4.1/applications/utilities/postProcessing/miscellaneous/sa mple

In this folder there is also an example of a sampleDict. Using this tool you can extract points along a line. I do not know if you can extract in specific points, but a line with two points is only a little bit do much workhttp://www.cfd-online.com/OpenFOAM_D...part/happy.gif

/ Niels

srinath June 9, 2008 06:34

Thanks Niels I copy the sam
 
Thanks Niels

I copy the sampleDict into the case/system directory
And it works perfectly when i issue the command
sample . cavity

Srinath

martinr January 6, 2009 08:30

Hi Users, Have you used pro
 
Hi Users,

Have you used probes function in multiphase flow solvers (rasInterFoam or interFoam)? I could obtain the probe/0/ files but there is a mistake. The values are not written in the correct time step.

I tried probes function with other solvers (icoFoam, oodles, turbFoam). In this cases probes function works fine.

I have not found the reason for this behaviour.
Any clue?

Thank you in advance.
Martin.


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