Variables turbFoam

sven · July 3, 2009, 20:11

I want to calculate a turbulent flow with the solver turbFoam. Since this solver is also used in one of the tutorials from the users guide I looked at this case. In the "0" folder of the case, there are, besides pressure and velocity, two variables defined , called "nuTilda" and "R". Does anyone know which physical properties are represented by these variables?
Thank you!

henrik · July 6, 2009, 05:11

Dear Sven,

R is the Reynolds Stress and nuTilda is the effective viscosity in Spalart-Almaras-model. Both are not used if you run k-e, but they are there because turbFoam would fall over if you switch to say SpalartAllmaras.

You can find out by browsing in

$FOAM_SRC/turbulenceModels/RAS/incompressible/lnInclude

Henrik

July 3, 2009, 20:11	Variables turbFoam	#1
sven Member Sven Winkler Join Date: May 2009 Posts: 70 Rep Power: 16	I want to calculate a turbulent flow with the solver turbFoam. Since this solver is also used in one of the tutorials from the users guide I looked at this case. In the "0" folder of the case, there are, besides pressure and velocity, two variables defined , called "nuTilda" and "R". Does anyone know which physical properties are represented by these variables? Thank you!

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July 6, 2009, 05:11		#2
henrik Senior Member Henrik Rusche Join Date: Mar 2009 Location: Wernigerode, Sachsen-Anhalt, Germany Posts: 281 Rep Power: 18	Dear Sven, R is the Reynolds Stress and nuTilda is the effective viscosity in Spalart-Almaras-model. Both are not used if you run k-e, but they are there because turbFoam would fall over if you switch to say SpalartAllmaras. You can find out by browsing in $FOAM_SRC/turbulenceModels/RAS/incompressible/lnInclude Henrik