[maysmech]

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,

[cnsidero]

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.

[maysmech]

Originally Posted by cnsidero

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

[HakikiCanakkaleli]

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

[Sagun]

Hello everyone,

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

Thanks,
Sagun