|December 10, 2012, 01:00||
SA Model Clarification
Join Date: Oct 2009
Location: Chennai, India
Posts: 102Rep Power: 8
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
Posts: 200Rep Power: 9
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:
|Thread||Thread Starter||Forum||Replies||Last Post|
|Water subcooled boiling||Attesz||CFX||7||January 5, 2013 04:32|
|Problems bout CFD model of biomass gasification, Downdraft gasifier||wanglong||FLUENT||2||November 26, 2009 00:27|
|Reynolds Stress model in CFX vs Fluent||Tim||CFX||1||October 7, 2009 06:19|
|help for different between les model (subgrid-scale model)||liuyuxuan||FLUENT||1||October 2, 2009 15:25|
|Grid resolution for full-scale and down scaled model||gravis||Main CFD Forum||0||October 2, 2009 10:27|