Energy dynamics modeling of commutator errors

F. van der Bos, Bernardus J. Geurts

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    For efficient large-eddy simulation of complex flow situations the use of non-uniform filter-widths is considered advantageous. It is, however, known that a non-uniform filter-width introduces additional SGS-terms, generally referred to as commutator-errors. The commutator-error can be associated with the creation and destruction of turbulent scales due to variations of the filter-width along Lagrangian flow-paths. A priori tests concerning the dynamics of kinetic energy have been carried out which confirm the validity of this idea. Consequently, a new model for the commutator-error has been developed. This model is tested on a turbulent temporal mixing layer at \mathrmRe=50.0 and \mathrmM=0.2 using a non-uniform filter-width in the non-homogeneous direction. This model, based on the energy dynamics of the commutator-error, is compared against more straight-forward formulations which represent the commutator-error in terms of the gradient and similarity model.
    Original languageEnglish
    Title of host publicationBulletin of the American Physical Society
    Pages119-119
    Publication statusPublished - 23 Nov 2003
    Event56th annual meetin of the Division of fluid dynamics: Bulletin of the American Physical Society -
    Duration: 23 Nov 200325 Nov 2003

    Publication series

    Name
    ISSN (Print)0003-0503

    Conference

    Conference56th annual meetin of the Division of fluid dynamics
    Period23/11/0325/11/03

    Keywords

    • METIS-212871

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