Dynamic Smagorinsky LES OpenFOAM/3.0.1

C-L · March 31, 2016, 11:25

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

wyldckat · April 2, 2016, 13:20

Quick answer: http://www.cfd-online.com/Forums/ope...tml#post486326 - post #7

Mirage · October 16, 2016, 16:28

Quote:

Originally Posted by wyldckat

Quick answer: http://www.cfd-online.com/Forums/ope...tml#post486326 - post #7

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 !

rob3rt 0ng · September 17, 2017, 23:06

Quote:

Originally Posted by C-L

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

C-L · September 19, 2017, 08:13

I ended up using a different turbulence model in the end. I got good results with both WALE and dynamicLagrangian.

rob3rt 0ng · September 19, 2017, 21:36

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

C-L · September 20, 2017, 05:29

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

March 31, 2016, 11:25	Dynamic Smagorinsky LES OpenFOAM/3.0.1	#1
C-L Member Charlie Lloyd Join Date: Feb 2016 Posts: 57 Rep Power: 10	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

April 2, 2016, 13:20		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,981 Blog Entries: 45 Rep Power: 128	Quick answer: http://www.cfd-online.com/Forums/ope...tml#post486326 - post #7 __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

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September 19, 2017, 08:13		#5
C-L Member Charlie Lloyd Join Date: Feb 2016 Posts: 57 Rep Power: 10	I ended up using a different turbulence model in the end. I got good results with both WALE and dynamicLagrangian.

September 19, 2017, 21:36		#6
rob3rt 0ng Member Robert Ong Join Date: Aug 2010 Posts: 86 Rep Power: 16	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

September 20, 2017, 05:29		#7
C-L Member Charlie Lloyd Join Date: Feb 2016 Posts: 57 Rep Power: 10	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