|December 10, 2012, 01:00||
SA Model Clarification
Join Date: Oct 2009
Location: Chennai, India
Posts: 102Rep Power: 7
I am trying to simulate compressible flow through an air intake.
I used SA model for turbulence. I defined "nuTilda" and "mut". When i run the problem, i get the following warning..
Then i define "k" and "epsilon". Even though i get the same warning.
What actually does it mean.
FOAM Warning :
From function tmp<volScalarField> SpalartAllmaras::k() const
in file SpalartAllmaras/SpalartAllmaras.C at line 262
Turbulence kinetic energy not defined for Spalart-Allmaras model. Returning zero field
Also when i tried to calculate the "yPlus". it asks for "nut". why?
|July 31, 2014, 07:39||
mutkWallFunction or mutUWallFunction
Join Date: Mar 2009
Location: Bad Friedrichshall, Germany
Posts: 164Rep Power: 8
Maybe I can help with this. Spalart Allmaras is a one equation turbulence model. It is not using turbulent kinetic energy k and a second variable like kEpsilon or kOmega models. Thus, the wall function for nut / mut have to be nutUWallFunction / mutUWallFunction instead of nutkWallFunction / mutkWallFunction for two equation models. So briefly:
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