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Dynamic Smagorinsky LES OpenFOAM/3.0.1

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Old   March 31, 2016, 11:25
Default Dynamic Smagorinsky LES OpenFOAM/3.0.1
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C-L
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Charlie Lloyd
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Hello All,

I am fairly new to openfoam and I have been using the homogeneousDynSmagorinsky model of version 2.3.1 for single phase pipe flow simulations with some success. However, I would like to include this turbulence model in the DPMFoam libraries, which currently only permit 3 different turbulence models. I think this is due to the new turbulence model structure of version 3.0.1 but I havn't found much information available on this. Some advice on how to include the old turbulence models into the new structure would be very helpful!

Thanks in advance,
Charlie
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Old   April 2, 2016, 13:20
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Quick answer: http://www.cfd-online.com/Forums/ope...tml#post486326 - post #7
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Old   October 16, 2016, 16:28
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Quote:
Originally Posted by wyldckat View Post
Could u please explain more how this post could help to implement or use homogeneousDynSmagorinsky ?
Why OF is losing his consistency ?

Thank you in Advance wyldckat !
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Old   September 17, 2017, 23:06
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Quote:
Originally Posted by C-L View Post
Hello All,

I am fairly new to openfoam and I have been using the homogeneousDynSmagorinsky model of version 2.3.1 for single phase pipe flow simulations with some success. However, I would like to include this turbulence model in the DPMFoam libraries, which currently only permit 3 different turbulence models. I think this is due to the new turbulence model structure of version 3.0.1 but I havn't found much information available on this. Some advice on how to include the old turbulence models into the new structure would be very helpful!

Thanks in advance,
Charlie
Hi Charlie,
Were you able to modify and/or implement dynamicSmagorinsky to 3.0.1?
If so, could you please share the modified .C and .H files?
Thanks and regards,
Robert
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Old   September 19, 2017, 08:13
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I ended up using a different turbulence model in the end. I got good results with both WALE and dynamicLagrangian.
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Old   September 19, 2017, 21:36
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Thanks for the info.
I was thinking to do the same too.
However, my simulation crashed when running using dynamicLagrangian due to the blow up of the bounding flm and fmm. Could you please share your initial conditions for these two and also their fvSolution and fvSchemes if possible?
Thanks and regards
Robert
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Old   September 20, 2017, 05:29
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Charlie Lloyd
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Check out this reference:
"A Lagrangian dynamic subgrid-scale model of
turbulence"
By CHARLES MENEVEAU

This has everything you need to know about the model.
I used the same discretisation schemes and linear solvers for flm and fmm as I did velocity. I set zeroGradient on the walls for fmm and fixedValue 0 for flm. I couldn't find much agreement concerning these boundary conditions on the forums though so perhaps read through the paper and decide on BC yourself.

Cheers,
Charlie
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