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limitations of k-epsilon-turbulence model

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Old   January 10, 2010, 19:06
Default limitations of k-epsilon-turbulence model
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jet
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Hi everybody,

can anybody tell me a reference, where I can find explanations about the limitations of the k-epsilon-turbulence model?
And I'm searching some data/ papers about the variation of the model constants c1 and c2!

Thank you!
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Old   January 14, 2010, 08:27
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Margarita DUFRESNE
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Hi Jet,

k-epsilon is based on average velocity concept, that why it unable to reporoduce correctly turbulent wake behind the road car. It doesn't work for for hypersonic flow.

I can give you the rference tommorow if you want.

KR,

mdz
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Old   January 19, 2010, 12:13
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Yogini Patel
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Hi mdz,

I am working in Turbulence Models,specially in k-espilon and k-omega models.So can you give some reference and material if you have.

Thank you.
Yogini.
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Old   January 20, 2010, 12:26
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Hi Jet,

I know that the k-epsilon model is not well adapted for modeling the wind. The turbulence model calculating the turbulent mixing-length would be more fitted to the atmospheric boundary layer. Below are some references about this topic:

Applicability of Linear Type Revised k-epsilon Models to Flow over Topographic Feature, Yu Fat Lun & Al., Texas Tech University, Wind Science & Engineering, Topography B11:3, 2663-2672
The Impact of Turbulence Closure Schemes On Predictions of the Mixed Spectral Finite-Difference Model For Flow Over Topography, Keith W. Ayotte & Al. , Boundary Layer Meteorology, Jan 1993
Turbulence Closure Models and their Application in RAMS, Trini Castelli & Al., Environmental Fluid Mechanics (2005) 5: 169-192
One Equation Turbulence Modelling for Atmospheric and Engineering Applications, Venetsanos, Feb 2004, Boundary-Layer Meteorology 113: 321-341, 2004
Numerical Simulation of Wind Flow over Hilly Terrain, Hyun Goo Kim & Al., Journal of Wind Engineering and Industrial Aerodynamics 87 (2000) 45-60

Best regards,

Faraday
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