Advances in second-order near-wall turbulence closures are summarized. All closures under consideration are based on high-Reynolds-number models. Most near-wall closures proposed to date attempt to modify the high-Reynolds-number models for the dissipation function and the pressure redistribution term so that the resultant models are applicable all the way to the wall. The asymptotic behavior of the near-wall closures is examined and compared with the proper near-wall behavior of the exact Reynolds-stress equations. It is found that three second-order near-wall closures give the best correlations with simulated turbulence statistics. However, their predictions of near-wall Reynolds-stress budgets are considered to be incorrect. A proposed modification to the dissipitation-rate equation remedies part of those predictions. It is concluded that further improvements are required if a complete replication of all the turbulence properties and Reynolds-stress budgets by a statistical model of turbulence is desirable.


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    Title :

    Second-order near-wall turbulence closures - A review


    Contributors:
    So, R. M. C. (author) / Lai, Y. G. (author) / Zhang, H. S. (author) / Hwang, B. C. (author)

    Published in:

    Publication date :

    1991-11-01



    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English