Regularization of turbulence - a comprehensive modeling approach

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    Abstract

    Turbulence readily arises in numerous flows in nature and technology. The large number of degrees of freedom of turbulence poses serious challenges to numerical approaches aimed at simulating and controlling such flows. While the Navier-Stokes equations are commonly accepted to precisely describe fluid turbulence, alternative coarsened descriptions need to be developed to cope with the wide range of length and time scales. These coarsened descriptions are known as large-eddy simulations in which one aims to capture only the primary features of a flow, at considerably reduced computational effort. Such coarsening introduces a closure problem that requires additional phenomenological modeling. A systematic approach to the closure problem, know as regularization modeling, will be reviewed. Its application to multiphase turbulent will be illustrated in which a basic regularization principle is enforced to physically consistently approximate momentum and scalar transport. Examples of Leray and LANS-alpha regularization are discussed in some detail, as are compatible numerical strategies. We illustrate regularization modeling to turbulence under the influence of rotation and buoyancy and investigate the accuracy with which particle-laden flow can be represented. A discussion of the numerical and modeling errors incurred will be given on the basis of homogeneous isotropic turbulence.
    Original languageUndefined
    Title of host publication13th European Tubulence Conference (ETC13)
    Place of PublicationBristol
    PublisherIOP
    Pages012002
    Number of pages10
    DOIs
    Publication statusPublished - 2011
    Event13th European Turbulence Conference, ETC 2011 - Warsaw, Poland
    Duration: 12 Sep 201115 Sep 2011
    Conference number: 13

    Publication series

    NameJournal of Physics: Conference Series
    PublisherIOP
    Number1
    Volume318
    ISSN (Print)1742-6596
    ISSN (Electronic)1742-6596

    Conference

    Conference13th European Turbulence Conference, ETC 2011
    Abbreviated titleETC13
    CountryPoland
    CityWarsaw
    Period12/09/1115/09/11

    Keywords

    • METIS-285093
    • MACS-MMS: Multiscale Modelling and Simulation
    • EWI-21436
    • IR-79658

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