S-A model: nut?
 

Hi,

Does anyone know the definition of the "nut"?

When you choose Spalart-Allmaras turbulence model, one of the residual is "nut".

Currently, I guess "nut" is the nu_t, i.e. turbulent kinetic viscosity, but I can't explain why at first iteration its value is alway very small instead of unit 1.

I hope someone could help me.

Many thanks.

i also want to this point. the calculation can go when I use k-epsilon model, but when it cann't go further when i use SA or DES with SA as ' Divergence detected in AMG solver: nut'

Could you find a solution for your problem? cause I have the same P.2

this problem alwasys caused by your grid.

Hi,

I was wondering if you find a solution for this problem? I have the same problem as well.

https://www.cfd-online.com/Forums/op...unction%20(fv1).