The Reynolds-stress and triple product Lag models were created with a normal stress distribution which was defined by the accepted 4:3:2 distribution of streamwise, spanwise and wall normal stresses, and a ratio of τ(sub w) = 0.3k in the log layer region of high Reynolds number flat plate flow, which implies R11(+) = 4/(9/2)∗.3 ≈ 2.96. More recent measurements show a more complex picture of the log layer region at high Reynolds numbers. The first cut at improving these models along with the direction for future refinements is described. Comparison with recent high Reynolds number data shows areas where further work is needed, but also shows inclusion of the modeled turbulent transport terms improve the prediction where they influence the solution. Additional work is needed to develop a model that better matches experiments, but there is significant improvement in many of the details of the log layer behavior.


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    Title :

    Improvement of Reynolds-Stress and Triple-Product Lag Models


    Contributors:

    Conference:

    AIAA Computational Fluid Dynamics Conference ; 2017 ; Denver, CO, United States


    Publication date :

    2017-06-05


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English




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    Revised Reynolds Stress and Triple Product Models

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