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Adding imaginary patch for calculation of average values

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Old   February 17, 2009, 08:58
Default Hello OF'ers, I am simulati
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Bart Boonacker
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Hello OF'ers,

I am simulating pipe flows and I have a question concerning the calculation of average velocities and pressures.
Is it possible to add something like an additional, imaginary, patch at a specified point in order to calculate the averages ?

I know it is possible within Paraview, but I am looking for something like patchAverage, although I do not want to use the Inlet or Outlet patch.

Thanks in advance,

Bart
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Old   February 17, 2009, 10:20
Default hi Bart have a look in anot
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antonio segalini
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hi Bart

have a look in another post regarding "pressure coefficients" in "Running / Solving / CFD". There someone suggested me to use probe points that save for each time you will store the value of velocity or pressure or whatever you want.

hope this helps

antonio
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Old   February 17, 2009, 10:30
Default Hi Bart, Have a look at the
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Jose Luis Santos
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Hi Bart,

Have a look at the sample utility, that lies in $FOAM_UTILITIES/postProcessing/sampling/sample.

In that path you have a sampleDict dictionary, that I believe is self-explanatory.

Just place that dictionary in the system directory of your case, and make the necessary adjustments to get the values belonging to the plane your are interested in.

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Jose Santos
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Old   February 20, 2009, 06:13
Default Hello Jose, Thanks for the
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Bart Boonacker
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Hello Jose,

Thanks for the tip, it works perfectly.
Now I only have to average the pressure on each surface and then I'm done

Bart
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Old   June 1, 2009, 23:00
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Subodh Kumar
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Hi Bart,

Did you able to calculate average from sampled data for planes. Though my patch is not a plane but i have sampled data, and I want to calculate average value from it. Can you help me out ??

Thanks in advance
Subodh
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