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extracting phi along a line

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Old   November 25, 2015, 11:53
Question extracting phi along a line
Join Date: Sep 2013
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I have a straight pipe simulation and I'd like to extract the values of phi along a line that starts at (x1,y1,z1) and ends at (x2,y2,z2).
This is possible for a volScalarField (e.g. epsilon, p, omega, k) and for a volVectorField (U) (but not for a surfaceScalarField as phi) by using sampleDict.

I guess this is because phi is defined at the face centres wheres the other quantities are defined at the cell centres.

Is there a way to overcome this problem?

Thanks for your attention!


Edit: Maybe it can be done with 'probes' as a function in controlDict. A result is output but I'm wondering how this is computed. Why does 'probes' output a result for a surfaceScalarField whereas it is not possible to get it with sampleDict? Is there a way to specify the probeLocations as a file and not as a list of points?

Last edited by Zen; November 26, 2015 at 10:41.
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phi, sampledict, surfacescalarfield

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