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Forum: OpenFOAM Bugs February 17, 2010, 04:55
Replies: 39
Views: 11,403
Posted By henry
I am not a big fan of clipping; I would prefer an...

I am not a big fan of clipping; I would prefer an approach where the formulation of the terms naturally obey the physical constraints. Do you have results that show that the original formulation...
Forum: OpenFOAM Bugs January 29, 2009, 03:20
Replies: 39
Views: 11,403
Posted By henry
Hi Eric, Thanks for the com

Hi Eric,

Thanks for the comparison, it confirms what we suspected that with the correct fv2 the fv3 term behaves satisfactorally.

> I would vote for baseline SA as standard implementation...
Forum: OpenFOAM Bugs January 28, 2009, 13:10
Replies: 39
Views: 11,403
Posted By henry
With SpalartAllmaras yes wall-

With SpalartAllmaras yes wall-functions are selected as boundary conditions on nut. The other low-Re models do not use wall-functions, optionally or otherwise.

H
Forum: OpenFOAM Bugs January 28, 2009, 10:23
Replies: 39
Views: 11,403
Posted By henry
Hi Sébastien, Thanks for te

Hi Sébastien,

Thanks for testing the two variants. For general use we will keep the version with fv3 but if there is interest we could add a switch to allow users to run the standard form or we...
Forum: OpenFOAM Bugs January 28, 2009, 10:00
Replies: 39
Views: 11,403
Posted By henry
Not true, there are several lo

Not true, there are several low-Re turbulence models included in OpenFOAM:

LamBremhorstKE
LaunderSharmaKE
LienCubicKELowRe
LienLeschzinerLowRe
SpalartAllmaras

all of which will run...
Forum: OpenFOAM Bugs January 28, 2009, 07:28
Replies: 39
Views: 11,403
Posted By henry
That form is correct for fv3 =

That form is correct for fv3 = 1 but to run with fv3 != 1 you will need to run with the second expression commented out, see the original post. If you have time to test this that would be great.
...
Forum: OpenFOAM Bugs January 28, 2009, 07:16
Replies: 39
Views: 11,403
Posted By henry
When you ran with fv3 != 1 cou

When you ran with fv3 != 1 could you clarify which form of fv2 you running with?

H
Forum: OpenFOAM Bugs January 28, 2009, 03:18
Replies: 39
Views: 11,403
Posted By henry
In these comparisons did you c

In these comparisons did you check that the fv2 term was set consistently for the cases with and without the fv3 term? The initial comparisons we did after introducing the fv3 term showed very...
Forum: OpenFOAM Bugs January 27, 2009, 16:23
Replies: 39
Views: 11,403
Posted By henry
I have pushed the change to fv

I have pushed the change to fv2 to OpenFOAM-1.5.x, please let me know if this resolves the issues with this model.

Thanks

H
Forum: OpenFOAM Bugs January 27, 2009, 11:00
Replies: 39
Views: 11,403
Posted By henry
Hi Sébastien, Thanks for th

Hi Sébastien,

Thanks for the interesting link, it seems they are not very happy with the fv3 term: " It was devised to prevent negative values of the source term, and is not recommended because...
Forum: OpenFOAM Bugs January 27, 2009, 09:59
Replies: 39
Views: 11,403
Posted By henry
Thanks for studying this code

Thanks for studying this code in detail and for the bug report, yes you are correct, this is currently inconsistent. We originally implemented the standard SA model and it worked well for simple...
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