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OpenFOAM wall function treatment

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Old   March 4, 2013, 10:20
Default OpenFOAM wall function treatment
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Hello there,

i have a question regarding the wall function treatment for the kOmegaSST model in OpenFOAM 2.1.x.

I am using the nutUSpaldingWallFunction and i would like to know, if it's comparable to the automatic wall function treatment in CFX. Does anybody knwo that? so does the nutUSpaldingWallFunction uses a blending between lowRe and highRe?
Is there another wall function available in OpenFOAM-2.1.x for the kOmegaSST turbulence model that is comparable to the automatic wall function treatment in CFX?

king regards!
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Old   March 4, 2013, 10:24
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Quote:
Originally Posted by kimotbwb View Post
Hello there,

i have a question regarding the wall function treatment for the kOmegaSST model in OpenFOAM 2.1.x.

I am using the nutUSpaldingWallFunction and i would like to know, if it's comparable to the automatic wall function treatment in CFX. Does anybody knwo that? so does the nutUSpaldingWallFunction uses a blending between lowRe and highRe?
Is there another wall function available in OpenFOAM-2.1.x for the kOmegaSST turbulence model that is comparable to the automatic wall function treatment in CFX?

king regards!

i forgot to mention:
i am interested only in wall function treatment for incompressible RANS applications
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Old   March 5, 2013, 13:10
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Yes it is a "automatic" wall function, but not comparable to that of CFX.
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Old   March 5, 2013, 16:04
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thanks for replying! so it uses some kind of automatic blending to accomplish to the low- and highRe formulation of the SST-model ?
i didn't really expect that it is comparable to that one used in CFX
do have any references of validation test cases for OpenFOAM that uses the Spalding wf formulation in combination with kOmegaSST ?
would be nice!
or maybe experiences using SST with Spalding?
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Old   September 4, 2013, 08:23
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These threads might be helpful:
http://www.cfd-online.com/Forums/ope...nce-model.html
http://www.cfd-online.com/Forums/ope...omega-sst.html
http://www.openfoam.org/mantisbt/view.php?id=179
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Old   September 4, 2013, 09:06
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is there an article about mutUSpaldingWallFunction?
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Old   September 4, 2013, 18:10
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Joachim Herb
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This is the original paper:
B. E. Launder and D. B. Spalding.
The Numerical Computation of Turbulent Flows.
Computer Methods in Applied Mechanics and Engineering, 3:269-289, 1974.
(I didn't find it online)


Perhaps this helps: http://www.tfd.chalmers.se/~lada/pos..._report_WF.pdf


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Old   March 6, 2015, 12:52
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Quote:
I was wondering if I am right: looking at the source code the function used to solve nut or U is only the viscous sublayer so lets say only valid for y+ < 10 ?

Does anabody know this for certain?
Nevermind, looking and plotting the function found in the original report of Spalding for the second time I conclude that above perception is wrong.

Last edited by FransVisscher; March 16, 2015 at 05:14.
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