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fv3 term in Spalart Allmaras model

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Old   September 30, 2011, 06:57
Default fv3 term in Spalart Allmaras model
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bfa
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Björn Fabritius
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Hello,
could anyone please explain to me what the fv3 term in the Spalart-Allmaras turbulence model does? I can't find any paper that suggests such a term, apart from this page http://turbmodels.larc.nasa.gov/spalart.html. There they say the term shouldn't be used, as it leads to "unusual transition behavior at low Reynolds numbers". The OpenFOAM realisation of this additional term is slightly different from the version proposed there:

Code:
    
    volScalarField chiByCv2 = (1/Cv2_)*chi;

    return
        (scalar(1) + chi*fv1)
       *(1/Cv2_)
       *(3*(scalar(1) + chiByCv2) + sqr(chiByCv2))
       /pow3(scalar(1) + chiByCv2);
Does anyone know, what it's for or could anyone point me to a paper that justifies it's existence?

cheers,
bjoern
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Old   July 16, 2013, 13:02
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Ben Graves
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Hi,

I was wondering if you ever found the answer to your question?

-Ben
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