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A bug in using dynamic LES models

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Old   November 26, 2009, 14:55
Default A bug in using dynamic LES models
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zakk
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Hi,

I m trying to use the dynamic LES models in the version 1.6 . Among the various models, only Smagorinsky and oneEqEddy model. The others are giving that error when I m running :

Selecting incompressible transport model Newtonian
Selecting turbulence model type LESModel
Selecting LES turbulence model dynSmagorinsky


keyword filter is undefined in dictionary ""

file:

From function dictionary::lookupEntry(const word&, bool, bool) const
in file db/dictionary/dictionary.C at line 388.

FOAM exiting
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Old   November 26, 2009, 16:35
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Alberto Passalacqua
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I can confirm this behaviour.

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Old   November 27, 2009, 04:48
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That is true, the choice of filter does not currently have a default and to use the dynamic models you will need to specify the filter you want to use. Do you think the
filter should have a default? If so which one do you think it should default to?

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Old   November 27, 2009, 16:43
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Alberto Passalacqua
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Hi Henry,

it used to default to "simple" filter in previous versions of OF, but probably a slightly different error message could also do the job. Something along the lines of

Quote:
keyword filter is undefined in dictionary "dynSmagorinskyCoeffs"
...
Please specify a filter as in the example

dynSmagorinskyCoeffs
{
filter simple;
}
Well, maybe this is a bit too long, but it gives the idea. I think the main difficulty zakk had was to find where to put the filter keyword.

Thanks.

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Old   December 8, 2009, 10:40
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I have pushed a development of "dictionary" into OpenFOAM-1.6.x which generates better warning and error messages. I hope that for this case it will make clearer what entries need to be added to the dynSmagorinskyCoeffs dictionary.

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Old   December 8, 2009, 13:02
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Alberto Passalacqua
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Thanks!

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Old   December 8, 2009, 17:34
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Thank you

Regards
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