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December 10, 2012, 00:00 |
SA Model Clarification
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#1 |
Senior Member
KGN
Join Date: Oct 2009
Location: Chennai, India
Posts: 121
Rep Power: 16 |
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? Cheers KGN |
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December 11, 2012, 07:03 |
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#2 |
Senior Member
KGN
Join Date: Oct 2009
Location: Chennai, India
Posts: 121
Rep Power: 16 |
Any reply ?
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July 31, 2014, 05:31 |
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#3 |
New Member
yossi
Join Date: Nov 2010
Posts: 8
Rep Power: 15 |
Hi,
Have you found a solution? |
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July 31, 2014, 07:39 |
mutkWallFunction or mutUWallFunction
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#4 | |
Senior Member
Fabian Roesler
Join Date: Mar 2009
Location: Germany
Posts: 213
Rep Power: 18 |
Hi
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: Quote:
Cheers Fabian |
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August 2, 2014, 05:46 |
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#5 |
New Member
yossi
Join Date: Nov 2010
Posts: 8
Rep Power: 15 |
I see,
Thanks! |
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