Skin-friction τ and surface-pressure p in a viscous flow constitute a pair of the intrinsically coupled physical quantities denoted by the notation ( τ , p ), which determines the near-wall flow structures. The exact ( τ , p ) relation derived from the Navier–Stokes (NS) equations provides a rational foundation for reconstruction of the ( τ , p ) structures in complex flows. Based on this coupling relation, a τ field can be obtained from the perturbed p field for the given boundary enstrophy flux field of a base flow as an inverse problem in the first-order approximation. Then, the corresponding near-wall velocity field is reconstructed by using the Taylor-series-expansion solution of the NS equations. Some elemental and complex ( τ , p ) structures in three-dimensional flow separations are reconstructed to demonstrate the applicability of the proposed method.


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    Titel :

    Skin-Friction and Surface-Pressure Structures in Near-Wall Flows


    Beteiligte:
    Liu, Tianshu (Autor:in)

    Erschienen in:

    AIAA Journal ; 56 , 10 ; 3887-3896


    Erscheinungsdatum :

    2018-05-31


    Format / Umfang :

    10 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch




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