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nuTilda dict?

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Old   April 9, 2012, 18:58
Default nuTilda dict?
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matthew
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hi
would anyone be able to provide me with the default nuTilda dict for the 0 time directory please?

I'm hoping to run spallart sim, unfortunately i deleted all the default tutorials that would've contained this info! (i needed space on linux partition)

thanks!
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Old   April 10, 2012, 04:41
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You could still download the whole openfoam package and you'll have everything back again:
http://www.openfoam.org/download/source.php
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Old   April 10, 2012, 09:52
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thank you but i was hoping to avoid this. I've still very limited space left on my linux partition.

I've never set up a spallart problem so the spallart-allmaras case is all i need.....

if anyone had this, that'd be great

thanks
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Old   April 10, 2012, 12:22
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If you tell me what's the tutorial you need exactly I'll upload that for you!
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Old   April 10, 2012, 14:51
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that would be excellent thank you!

i believe it is the incompressible/simplefoam/airFoil2D tutorial

thanks
matt
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Old   April 10, 2012, 14:55
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Here you go!

(Had to get rid of the polyMesh folder because the file exceeded the maximum upload dimension, hope that's ok for you!)
Attached Files
File Type: zip airFoil2D.zip (12.2 KB, 24 views)
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Old   April 10, 2012, 15:20
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thanks!
very useful
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Old   April 26, 2013, 03:22
Smile nu and nuTilda
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Can anyone please tell me what do nu and nuTilda files signify in OpenFOAM?
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Old   April 26, 2013, 04:54
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Quote:
Originally Posted by akshaybagi View Post
Can anyone please tell me what do nu and nuTilda files signify in OpenFOAM?

Hello,
  • "nu" stands for the kinematic viscosity in [m^2/s] with "nu= mu/rho" ("mu" = dynamic viscosity [Pa*s], "rho" = density [kg/m^3] )
  • "nut" is the turbulent viscosity (incompressible) and "mut" the turbulent viscosity (compressible)
  • "nuTilda" is a field variable only (?) for the "Spalart Allmaras turbulence model" --> look at the source code (OpenFOAM/src/turbulenceModels/incompressibe/RAS/SpalartAllmaras/SpalartAllmaras.C) or http://courses.washington.edu/mengr5...our-report.pdf ( Equation (18) )
Is this what you are looking for ???
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Last edited by bscphil; April 26, 2013 at 05:19.
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Old   April 27, 2013, 03:37
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ya got it thanks
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