LES modeling errors in free and wall bounded compressible shear layers

Bernard Geurts, Bert Vreman, Hans Kuerten, Vassilios Theofilis

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    Abstract

    We present direct numerical simulation results (DNS) for a compressible mixing layer and a compressible boundary layer on a flat plate in 2D. The exact filtered Navier-Stokes equations are derived and the contribution of the subgrid-terms and the discretisation errors is calculated by filtering the DNS data to a coarser grid. It will be shown that the discretisation errors are larger than the dominant subgrid terms if the filterwidth is comparable to the grid spacing. This holds for second and fourth order accurate spatial discretisations.
    Original languageEnglish
    Title of host publicationEngineering Turbulence Modelling and Experiments
    Subtitle of host publicationProceedings of the Second International Symposium on Engineering Turbulence Modelling and Measurements, Florence, Italy, 31 May–2 June, 1993
    EditorsW. Rodi, F. Martelli
    PublisherElsevier Science
    Pages325-331
    Number of pages7
    ISBN (Print)978-0-444-89802-9
    DOIs
    Publication statusPublished - 31 May 1993
    Event2nd International Symposium on Engineering Turbulence Modelling and Measurements, ETMM 1993 - Florence, Italy
    Duration: 31 May 19932 Jun 1993
    Conference number: 2

    Conference

    Conference2nd International Symposium on Engineering Turbulence Modelling and Measurements, ETMM 1993
    Abbreviated titleETMM
    CountryItaly
    CityFlorence
    Period31/05/932/06/93

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