Computational error-minimization for LES of non-premixed turbulent combustion

Andreas Kempf

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    Abstract

    We apply the error-landscape analysis to turbulent non-premixed combustion in a bluff-body flame and investigate the error-reduction that can be achieved by adopting the SIPI algorithm (succesive inverse polynomial interpolation) for direct optimization of the combined effect of discretization and modeling errors. Small scale turbulent flow aspects are modeled using the Smagorinsky model and a flamelet formulation is adopted for the combustion process. A systematic study of numerical predictions at various resolutions and different levels of subgrid dissipation is conducted, providing an overview of partial error-cancellation. The general structure of the error-landscape is similar to that found for single phase homogeneous isotropic flow - the application of SIPI results in a considerable reduction of the total error (15-50 % improvement in relative error) after a small number of iterations. The SIPI approach provides an impression of the sensitivity of predictions on numerical and modeling parameters
    Original languageUndefined
    Title of host publicationQuality and Reliability of Large-Eddy Simulations II
    EditorsMaria-Vittoria Salvetti, Bernardus J. Geurts, Johan Meyers, Pierre Sagaut
    Place of PublicationDordrecht
    PublisherSpringer
    Pages351-360
    Number of pages10
    ISBN (Print)978-94-007-0230-1
    DOIs
    Publication statusPublished - 2011
    EventQuality and Reliability of Large-Eddy Simulations II, QLES 2009 - Pisa, Italy
    Duration: 9 Sep 200911 Sep 2009
    Conference number: 2

    Publication series

    NameERCOFTAC Series
    PublisherSpringer
    Volume16
    ISSN (Print)1382-4309

    Workshop

    WorkshopQuality and Reliability of Large-Eddy Simulations II, QLES 2009
    Abbreviated titleQLES
    CountryItaly
    CityPisa
    Period9/09/0911/09/09

    Keywords

    • METIS-277494
    • IR-75962
    • Successive inverse polynomial interpolation
    • EWI-19345
    • Turbulence
    • Error landscape
    • Non-premixed combustion

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