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Reference to oneEqEddy and dynOneEqEddy

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Old   August 29, 2011, 07:19
Default Reference to oneEqEddy and dynOneEqEddy
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Gustaf
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Hello.
as the title states I'm on the hunt for the reference for oneEqEddy and dynOneEqEddy used in OpenFOAM 1.7.1
I look inthe soure code but thet didn't stated any ref there.

Thanks

//Gustaf
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Old   August 25, 2012, 12:20
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Awais Ali
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http://www.aem.umn.edu/people/facult...aiaa10_les.pdf
Well I was also looking for a reference and I found this paper. I haven't read it yet, but this might be the reference you are looking for.

regards,
Awais
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Old   November 19, 2014, 11:15
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Ferdinand Pfender
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oneEqEddy is defined by:

k-Equation:
Yoshizawa, Akira; Horiuti, Kiyosi -- A Statistically-Derived Subgrid-Scale Kinetic Energy Model for the Large-Eddy Simulation of Turbulent Flows -- Journal of the Physical Society of Japan -- 1985 -- Vol. 54 -- Issue 8 -- pages 2834-2839 -- doi: 10.1143/JPSJ.54.2834 p, li

k_sgs-transport:
Menon, S; Yeung, P.-K.; Kim, W.-W. -- Effect of subgrid models on the computed interscale energy transfer in isotropic turbulence -- Computers & Fluids -- 1996 -- Volume 25 -- Issue 2 -- pages: 165-180 -- doi: 10.1016/0045-7930(95)00036-4

where the parameter c_k = 0.0094 is defined like in oneEqEddy by:
Nakayama, A.; Vengadesan, S. N. -- On the influence of numerical schemes and subgrid-stress models on large eddy simulation of turbulent flow past a square cylinder -- International Journal for Numerical Methods of Fluids -- 2002 -- Volume 38 -- Issue 3 -- pages: 227-253 -- doi: 10.1002/fld.214
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Old   December 5, 2014, 03:21
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thanks for this important information.
But I couldnīt find the k-equation from the oneEqEddy-equation in the paper of Yoshizawa


I am looking for this equation (see attached picture), which is defined in oneEqEddz.C (OpenFOAM-2.1.1\src\turbulenceModels\incompressible\LES\oneE qEddy\oneEqEddy.C) and the used constant ce_ = 1.048 (defined in: Z:\OpenFOAM\OpenFOAM-2.1.1\src\turbulenceModels\incompressible\LES\GenE ddyVisc\GenEddyVisc.C)

Could anyone help me please?

Thanks a lot
idefix
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Old   October 19, 2015, 05:43
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Hi Gustaf

The dynOneEnEddy model is exactly based on the Local Dynamic k-Equation Subgrad-Scale Model in this paper. It takes me quite a while to find it.

Won-Wook Kim and Suresh Menon, A new dynamic one-equation subgrid-scale model for large eddy simulations. AIAA 95-0356.

Chuangxin
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Old   September 29, 2018, 17:40
Default Can anyone help with this?
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priyesh kakka
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Quote:
Originally Posted by idefix View Post
thanks for this important information.
But I couldnīt find the k-equation from the oneEqEddy-equation in the paper of Yoshizawa


I am looking for this equation (see attached picture), which is defined in oneEqEddz.C (OpenFOAM-2.1.1\src\turbulenceModels\incompressible\LES\oneE qEddy\oneEqEddy.C) and the used constant ce_ = 1.048 (defined in: Z:\OpenFOAM\OpenFOAM-2.1.1\src\turbulenceModels\incompressible\LES\GenE ddyVisc\GenEddyVisc.C)

Could anyone help me please?

Thanks a lot
idefix
i want to know how k is calculated at inlet for a jet flow?
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Old   September 30, 2018, 13:06
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Chuangxin HE
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Quote:
Originally Posted by kakkapriyesh View Post
i want to know how k is calculated at inlet for a jet flow?

k can be calculated from a fully developed turbulent pipe flow, boundary layer flow or similar flows (spatial- and time-varying), or just specified as a small constant when the turbulent inflow condition is used. the difference is not significant.
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