Large-Eddy Simulation of a Particle-Laden Turbulent Channel Flow

A.W. Vreman, B.J. Geurts, N.G. Deen, J.A.M. Kuipers

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    Abstract

    Large-eddy simulations of a vertical turbulent channel flow with 420,000 solid particles are performed in order to get insight into fundamental aspects of a riser flow The question is addressed whether collisions between particles are important for the ow statistics. The turbulent channel ow corresponds to a particle volume fraction of 0.013 and a mass load ratio of 18, values that are relatively high compared to recent literature on large-eddy simulation of two-phase ows. In order to simulate this ow, we present a formulation of the equations for compressible ow in a porous medium including particle forces. These equations are solved with LES using a Taylor approximation of the dynamic subgrid-model. The results show that due to particle-uid interactions the boundary layer becomes thinner, leading to a higher skin-friction coefcient. Important effects of the particle collisions are also observed, on the mean uid prole, but even more o on particle properties. The collisions cause a less uniform particle concentration and considerably atten the mean solids velocity prole.
    Original languageEnglish
    Title of host publicationDirect and Large-Eddy Simulation V
    Subtitle of host publicationProceedings of the fifth international ERCOFTAC Workshop on Direct and Large-Eddy Simulation held at the Munich University of Technology, August 27–29, 2003
    EditorsRainer Friedrich, Bernard J. Geurts, Olivier Métais
    Place of PublicationDordrecht
    PublisherKluwer Academic
    Pages271-278
    ISBN (Electronic)978-1-4020-2313-2
    ISBN (Print)978-90-481-6575-9
    DOIs
    Publication statusPublished - 2003
    Event5th ERCOFTAC Workshop on Direct and Large-Eddy Simulation V, DLES 2003 - Munich University of Technology, Munich, Germany
    Duration: 27 Aug 200329 Aug 2003
    Conference number: 5

    Publication series

    NameERCOFTAC series
    PublisherKluwer Academic
    Volume9
    ISSN (Print)1382-4309

    Conference

    Conference5th ERCOFTAC Workshop on Direct and Large-Eddy Simulation V, DLES 2003
    Abbreviated titleDLES
    CountryGermany
    CityMunich
    Period27/08/0329/08/03

    Keywords

    • Large-Eddy simulation
    • Turbulence
    • Two-phase flow

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