A framework to assess the quality and robustness of LES codes

J. Meyers, P. Sagaut, B. J. Geurts

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    Abstract

    We present a framework which can be used to rigourously assess and compare large-eddy simulation methods. We apply this to LES of homogeneous isotropic turbulence using three different discretizations and a Smagorinsky model. By systematically varying the simulation resolution and the Smagorinsky coefficient, one can determine parameter regions for which one, two or multiple flow predictions are simultaneously predicted with minimal error. To this end errors on the predicted longitudinal integral length scale, the resolved kinetic energy and the resolved enstrophy are considered. Parameter regions where all considered errors are simultaneously (nearly) minimal are entitled ‘multi-objective optimal’ parameter regions. Surprisingly, we find that a standard second-order method has a larger ‘multiobjective optimal’ parameter region than two considered fourth order methods. Moreover, the errors in the respective ‘multi-objective optimal’ regions are also lowest for the second-order scheme.
    Original languageEnglish
    Title of host publicationASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting Collocated With the 14th International Conference on Nuclear Engineering
    PublisherAmerican Society of Mechanical Engineers (ASME)
    Pages881-886
    Number of pages6
    ISBN (Electronic)0-7918-3783-1
    ISBN (Print)0-7918-4751-9
    DOIs
    Publication statusPublished - Jul 2006
    EventASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006 - Miami, United States
    Duration: 17 Jul 200620 Jul 2006
    Conference number: 2

    Conference

    ConferenceASME 2006 2nd Joint U.S.-European Fluids Engineering Summer Meeting, FEDSM 2006
    Abbreviated titleFEDSM
    CountryUnited States
    CityMiami
    Period17/07/0620/07/06

    Keywords

    • EWI-9029
    • METIS-238751
    • IR-66869

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