Towards local isotropy of higher order statistics in wakes

S. Tang, R.A. Antonia, L. Djenidi, L. Danaila, Y. Zhou, Tongming Zhou

    Research output: Chapter in Book/Conference paperConference paperpeer-review

    Abstract

    © Springer International Publishing Switzerland 2016.In this paper, we test the local isotropy of higher order statistics in the intermediate wake region. We focus on normalized odd moments of the transverse velocity derivatives, [Formula presented] on the wake centreline, which should be zero if local isotropy is satisfied (n is a positive integer). It is found that the relation M2n+1(?u/?z) ~ R-1? is supported reasonably well by hot-wire data up to the seventh-order (n = 3), although it is also dependent on the initial conditions. In particular, the present data show that the higher the order (e.g. fifth- or seventh-order), the higher R? must be for local isotropy to be satisfied (i.e. M2n+1(?u/?z) = 0).
    Original languageEnglish
    Title of host publicationProceedings of the 5th International Conference on Jets, Wakes and Separated Flows
    EditorsAntonio Segalini
    PublisherSpringer Science + Business Media
    Pages119-124
    Number of pages6
    ISBN (Print)9783319306001
    DOIs
    Publication statusPublished - 2016
    Event5th International Conference on Jets, Wakes and Separated Flows: ICJWSF2015 - Stockholm, Sweden
    Duration: 15 Jun 201518 Jun 2015

    Publication series

    NameSpringer Proceedings in Physics
    Volume185
    ISSN (Print)0930-8989
    ISSN (Electronic)1867-4941

    Conference

    Conference5th International Conference on Jets, Wakes and Separated Flows
    Country/TerritorySweden
    CityStockholm
    Period15/06/1518/06/15

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