what is nutilda?
 

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,

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

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

Hello everyone,

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

Thanks,
Sagun