Comparison of Subgrid-Models in Les of the Compressible Mixing Layer

Bert Vreman, Hans Kuerten, Bernard Geurts

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    Abstract

    Large Eddy Simulation (LES) of turbulent flow forms a field of intensive research. Whereas a Direct Numerical Simulation (DNS) solves all scales present in the flow, LES solves only the large scales directly and models the effect of the small scales, represented by the turbulent stress, with a subgrid-model. For testing subgrid-models two approaches can be distinguished, a priori tests and a posteriori tests. In this paper we will focus on a posteriori tests, in which actual Large Eddy Simulations are performed and the results are compared with results from filtered DNS-data. The flow we consider is the temporal mixing layer at low Mach number. Models incorporated into the tests are: the Smagorinsky model [1], the gradient model [2], the similarity model [3], the dynamic eddy-viscosity model [4] and the dynamic mixed model [5].
    Original languageEnglish
    Title of host publicationAdvances in Turbulence V
    Subtitle of host publicationProceedings of the Fifth European Turbulence Conference, Siena, Italy, 5–8 July 1994
    EditorsRoberto Benzi
    Place of PublicationDordrecht
    PublisherKluwer Academic
    Pages539-543
    ISBN (Electronic)978-94-011-0457-9
    ISBN (Print)978-94-010-4205-5
    DOIs
    Publication statusPublished - 1994
    Event5th European Turbulence Conference, ETC 1994 - Siena, Italy
    Duration: 5 Jul 19948 Jul 1994
    Conference number: 5

    Publication series

    NameFluid Mechanics and Its Applications
    PublisherKluwer Academic
    Volume24

    Conference

    Conference5th European Turbulence Conference, ETC 1994
    Abbreviated titleETC
    CountryItaly
    CitySiena
    Period5/07/948/07/94

    Keywords

    • Large eddy simulation
    • Compressible mixing layer
    • Gradient model
    • Direct numerical simulation
    • Total kinetic energy
    • Momentum thickness

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