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S-A model: nut?

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Old   December 20, 2004, 18:24
Default S-A model: nut?
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Johnix
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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.

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Old   May 9, 2010, 12:40
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Maxmum
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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'
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Old   October 5, 2010, 08:51
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Shobeir
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Could you find a solution for your problem? cause I have the same P.2
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Old   October 17, 2010, 04:51
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this problem alwasys caused by your grid.
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