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Can turbuence model predict Relaminarization?

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Old   May 15, 2003, 10:08
Default Can turbuence model predict Relaminarization?
  #1
kei-tee
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Hi every one,

Now, I'm interested in relaminalization (turbulent to laminar)phenomena, which is due to strong flow accelalation. Does anyone know the turbulence model , which can predict relaminarization process? Both Rans or LES dynamic model are welcome. Please tell me some paper or information.

Best regards, kei-tee
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Old   May 15, 2003, 11:50
Default Re: Can turbuence model predict Relaminarization?
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Tom
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Ideally a LES with an adaptive filter should be able to predict relaminarization but in practice I don't any model can do even an adequate job in all circumstances.

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Old   May 16, 2003, 04:13
Default Re: Can turbuence model predict Relaminarization?
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nicola
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Relaminaritation with RANS usually requires some theoretical-empirical correlations. For low pressure gas turbine blades, Abu-Ghannam and Shaw criterium with some other corrections is a standard tool. Some turbulence models (Spalart-Allmaras and Menter) have shown to be promising techniques, but it seems to me that much work is to be done yet.

Nicola
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Old   May 20, 2003, 02:43
Default Re: Can turbuence model predict Relaminarization?
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xing zhang
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Try B. Perot's turbulent potential model. They have a paper in JOT, you can search it.
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Old   May 28, 2003, 10:16
Default Re: Can turbuence model predict Relaminarization?
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Fabio Saltara
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Low Re models with apropriate damping functions can predict laminarization. One interesting source is:

The prediction of laminarization with a two-equation model of turbulence

W.P. Jones and B.E. Launder

Int. Journal of Heat and Mass Transfer vol. 15 pp 301-314 1972

This paper, although old, deals with laminarization of a turbulent boundary layer due to strong acceleration. I hope that it helps you.

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Old   June 3, 2003, 06:58
Default Re: Can turbuence model predict Relaminarization?
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Jonas Bredberg
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Hi,

The Jones-Launder TM makes a very questionable job of predicting re-laminarization. I would stick to work by e.g. Menter. I atended a conference last year ETMM5 in Mallorca, where Menter presented his latest findings, which sounded promising.
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