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