CFD Modelling of particle mixtures in a 2D CFB

Maiju Seppälä, Sirpa Kallio

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

    1 Citation (Scopus)

    Abstract

    The capability of Fluent 6.2.16 to simulate particle mixtures in a laboratory scale 2D circulating fluidized bed (CFB) unit has been tested. In the simulations, the solids were described as one or two particle phases. The loading ratio of small to large particles, particle diameters and the gas inflow velocity were varied. The paper presents the segregation patterns of the particle phases obtained from the simulations. When the fraction of large particles was 50% or larger, large particles segregated, as expected, to the wall regions and to the bottom part of the riser. However, when the fraction of large particles was 10%, an excess of large particles was found in the upper half of the riser. The explanation for this unexpected phenomenon was found in the distribution of the large particles between the slow clusters and the faster moving lean suspension.
    Original languageEnglish
    Title of host publicationProceedings of the 20th International Conference on Fluidized Bed Combustion
    Place of PublicationBeijing
    PublisherTsinghua University Press
    Pages851-856
    ISBN (Print)978-7-302-20146-5
    Publication statusPublished - 2009
    MoE publication typeA4 Article in a conference publication
    Event20th International Conference on Fluidized Bed Combustion - Xi'an, China
    Duration: 18 May 200921 May 2009

    Conference

    Conference20th International Conference on Fluidized Bed Combustion
    Country/TerritoryChina
    CityXi'an
    Period18/05/0921/05/09

    Keywords

    • particle mixtures
    • CFD
    • 2D
    • hydrodynamics
    • CFB

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