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March 5, 2014, 13:11 |
No more dynSmagorinsky in v. 2.3.0 ?
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#1 |
New Member
Join Date: Apr 2012
Posts: 4
Rep Power: 13 |
Hi everybody,
I am beginning on OpenFoam (using 2.1.0) and as I am trying to use dynamic smagorinsky model, I have an error message saying the following : --> FOAM FATAL ERROR: Unknown LESModel type dynSmagorinsky Valid LESModel types: 15 ( DeardorffDiffStress LRRDiffStress Smagorinsky SpalartAllmaras SpalartAllmarasDDES SpalartAllmarasIDDES dynLagrangian dynOneEqEddy homogeneousDynOneEqEddy homogeneousDynSmagorinsky kOmegaSSTSAS laminar mixedSmagorinsky oneEqEddy spectEddyVisc ) It seems many models that are supposed to be able available are missing. Can someone help me with this ? Thanks a lot ! |
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March 6, 2014, 10:03 |
No more dynSmagorinsky in v. 2.3.0 ?
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#2 |
New Member
Join Date: Apr 2012
Posts: 4
Rep Power: 13 |
Hi, I am new to OpenFoam and I want to use it for LES. I have seen that in previous versions a dynamic Smagorinsky turbulence model was in library, but it seems it has disappeared in v.2.3.0.
Does someone know solmething about it ? Thanks a lot ! |
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March 6, 2014, 16:44 |
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#3 | |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
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Greetings fbar,
I've merged your two threads on this topic, since they were related, although one referring to 2.1.0 and the other to 2.3.0. The model was renamed back in OpenFOAM 1.7.x: https://github.com/OpenCFD/OpenFOAM-...890d543f61531d Quoting the commit message: Quote:
Bruno
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March 7, 2014, 06:00 |
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#4 |
New Member
Join Date: Apr 2012
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Thanks a lot for your answer, I moved on homogeneousDynSmag but was not absolutely sure !
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July 22, 2014, 13:36 |
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#5 |
Senior Member
Canakkale Dardanelspor
Join Date: Aug 2012
Posts: 135
Rep Power: 13 |
Hi,
== 1 == Is there any reason why 'dynMixedSmagorinsky' is removed from the recent versions? Many thanks in advance. |
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July 26, 2014, 09:56 |
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#6 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
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Quick answer: From what I could see, it was renamed as well. Currently it's named "mixedSmagorinsky" and is located at "$FOAM_SRC/turbulenceModels/incompressible/LES/" in OpenFOAM 2.3.
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July 26, 2014, 14:43 |
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#7 |
Senior Member
Canakkale Dardanelspor
Join Date: Aug 2012
Posts: 135
Rep Power: 13 |
Hi,
== 1 == Many thanks for your answer. == 2 == I personally do not agree with this conclusion as 'mixedSmagorinsky' is not a dynamic model; but, a linear combination of scale-similarity and Smagorinsky(ish) models. Also, 'mixedSmagorinsky' class is present from the get-go. |
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July 27, 2014, 08:51 |
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#8 | ||
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,974
Blog Entries: 45
Rep Power: 128 |
Hi HakikiCanakkaleli,
Quote:
Mmm... the only difference in the header for the dyn version was this: Quote:
Code:
-class mixedSmagorinsky +class dynMixedSmagorinsky : public scaleSimilarity, - public Smagorinsky + public dynSmagorinsky As far as I can see, the class "homogeneousDynSmagorinsky" which was originally "dynSmagorinsky", is based on code that has been in FOAM at least since 1991, if the copyright notice on the header is correct (have a look into the commit I mentioned before). The class seems to have been renamed for clarity, because there seems to be more than one way to implement a dynamic version of this model. If you search online for "dynSmagorinsky", you'll see that other people have had to make some changes to that class/model, for example: http://powerlab.fsb.hr/ped/kturbo/Op...UniRostock.pdf This leads me to deduce/think that when they renamed the class and added some more details, it was likely because someone reported this as a bug... and I found said bug just now: http://www.openfoam.org/mantisbt/view.php?id=99 - the bug report is pretty detailed, but there is no reference to the mixed variant. From what I can deduce, the issue is that "dynMixedSmagorinsky" would no longer make much sense as "homogeneousDynMixedSmagorinsky", since they did not have the time to do more tests and validations with it. Or because in light of the topics discussed on the report, this modelling strategy would no longer make much sense. If you want to know more details on what really happened, try using the contact form at www.openfoam.com Best regards, Bruno
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