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k-omega SST simpleFoam asks for nut

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Old   June 16, 2016, 11:13
Default k-omega SST simpleFoam asks for nut
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Kevin Cole
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Hello,

I'm trying to run simulations using the k-omega SST model. When I execute simpleFoam, I receive the following error:
Code:
FOAM FATAL IO ERROR:
cannot find file

file: /home/kodexys/OpenFOAM/kodexys-3.0.1/TEST/NACA0015/0degAoA/0/nut at line 0.
     From function regIOobject::readStream()
     in file db/regIOobject/regIOobjectRead.C at line 73

FOAM exiting
It is my understanding that OpenFOAM wants a nut file to continue the simulation. However, shouldn't the nut be generated automatically? Also, I've read that k-omega SST shouldn't require nut.

I could make my own nut file, but I want to know what is going on. Any insight would be greatly appreciated!
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Old   October 17, 2017, 07:05
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james
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Please could you inform as to whether you ever managed to resolve this issue
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Old   October 17, 2017, 09:17
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Gerhard Holzinger
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In OpenFOAM-5.0 all turbulence models derived from Foam::eddyViscosity read the field nut. Even if nut can be calculated from other turbulent quantities, you need a nut field to select boundary conditions (i.e. wall functions). One could devise another mechanism to select BCs for nut, however, having the nut field is quite elegant.
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