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Best method to extract Reynolds stress at outlet.

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Old   September 5, 2017, 08:37
Default Best method to extract Reynolds stress at outlet.
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anonymous
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Hello all,

I am looking to sample the Reynolds stress at the outlet for a simulation. These values will act as input for a synthetic eddy method simulation.

So far I have been able to calculate the WHOLE R field using:
"pimpleFoam -postProcess -func R"

This calculates the whole field, but without position coordinates. I have two questions:

(1) Could I modify the above code to also output coordinates?
(2) Is there a way to calculate R only at the outlet?

Regards!
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Old   September 5, 2017, 11:13
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Bruno Lebon
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You could use a surface function object to output R at the outlet:

See $FOAM_ETC/caseDicts/postProcessing/visualization/surfaces
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Old   September 14, 2017, 07:20
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Quote:
Originally Posted by blebon View Post
You could use a surface function object to output R at the outlet:

See $FOAM_ETC/caseDicts/postProcessing/visualization/surfaces
I have used a more brutish approach. I may also try your method, thanks for the reply. I have done the following:
  • Generate the whole field using "pimpleFoam -postProcess -func R".
  • Obtain cell centre coordinates, where R is stored, by executing "writeCellCentres".
  • Input all values of R, and their corresponding coordinates, into Matlab for post-processing.

Regards!
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