Variables turbFoam

sven · July 3, 2009, 21:11

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, 06:11

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, 21:11	Variables turbFoam	#1
sven Member Sven Winkler Join Date: May 2009 Posts: 70 Rep Power: 17	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!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
ADDITIONAL VARIABLES LIMITERS	N.P	CFX	5	December 1, 2011 08:47
Effect of temp variables in subroutine	CF	Main CFD Forum	2	April 20, 2008 11:13
SimpleFoam result for turbFoam initialisation	philippose	OpenFOAM Running, Solving & CFD	0	November 26, 2006 11:24
PHI file structure	Eugene	Phoenics	9	November 2, 2001 23:00
Saving variables on a user patch with physical coordinates	Zoltan Turzo	CFX	2	April 20, 2000 16:05

July 6, 2009, 06:11		#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