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Calculate and display eddy viscosity

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Old   May 2, 2008, 04:49
Default Hello everybody, I have bee
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Thomas Ceyrowsky
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Hello everybody,

I have been doing some URANS-calculations using different turbulence models and would now like to display the eddy viscosity. This is not possible directly because the nut-field data has not been written. Using paraview's calculator is also not an adequate option...

Is there a utility for calculating the eddy viscosity field afterwards?

Thanks a lot,

Thomas
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Old   May 2, 2008, 05:52
Default Attached is one that I have ki
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Mark Olesen
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Attached is one that I have kicking around for calculating mu_t for k/eps (we only have compressible flow). You should be able to adapt it to nu_t without too much effort.

turbvisc.C
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Old   May 2, 2008, 06:10
Default Hey Mark, thank you very mu
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Thomas Ceyrowsky
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Hey Mark,

thank you very much! Unforunatelly I'm a newby to C++ and so there's still a question:
Is Cmu a constant in your utility or is it calculated (for non-linear turbulence modells like realizable-k-epsilon)?

Thanks anyway,

Thomas
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Old   May 2, 2008, 06:41
Default The function nuEff calculates
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Rosario Russo
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The function nuEff calculates automatically viscous + turbulent viscosity according to the employed turbulence model.

For example in simpleFoam you can compute it via

turbulence->nuEff()()
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Old   February 16, 2009, 13:57
Default Are you updating nut at each t
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Nat Trask
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Are you updating nut at each timestep? Somewhere in your solver you should have a nut = turbulence->nuEff()
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