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Old   August 28, 2010, 09:52
Question what is nutilda?
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Dear Foamers,

What is nutilda? i found it in 0 folder of les and kepsilon of pisoFoam tutorial (also other solvers).
what should be its value in boundaries: wall, inlet, outlet ?

Best,
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Old   August 28, 2010, 20:22
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Chris Sideroff
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nuTilda is for the Spalart-Allmaras turbulence model (the value solved for that determines the turbulent vicosity). See: http://www.cfd-online.com/Wiki/Spalart-Allmaras_model

The nuTilda file will ignored unless you have enabled the SA turbulence model.
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Old   August 29, 2010, 10:24
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Quote:
Originally Posted by cnsidero View Post
nuTilda is for the Spalart-Allmaras turbulence model (the value solved for that determines the turbulent vicosity). See: http://www.cfd-online.com/Wiki/Spalart-Allmaras_model

The nuTilda file will ignored unless you have enabled the SA turbulence model.
Thanks,
do you mean it is not important when using k-e, LES & ... turbulence methods?
it is available in o folder of these tutorials.
also tell me about "nut" and "nusgs" if possible.
Regards,
Maysam
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Old   August 28, 2012, 09:38
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nuSgs is the choice of wall function for the incompressible LES. Simply, kinematic viscosity.

Check it out? http://www.openfoam.org/docs/user/turbulence.php
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Old   October 11, 2012, 11:26
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Hello everyone,

In continuation with the topic, how does one determine the values of kqRWallFunction and epsilonWallFunction?

Thanks,
Sagun
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