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    Effect of inlet boundary conditions on computational fluid dynamics (cfd) simulations of gas-solid flows in risers

    Access Status
    Fulltext not available
    Authors
    Shah, Milinkumar
    Utikar, Ranjeet
    Evans, G.
    Tade, Moses
    Pareek, Vishnu
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Shah, M. and Utikar, R. and Evans, G. and Tade, M. and Pareek, V. 2012. Effect of inlet boundary conditions on computational fluid dynamics (cfd) simulations of gas-solid flows in risers. Industrial and Engineering Chemistry Research. 51 (4): pp. 1721-1728.
    Source Title
    Industrial and Engineering Chemistry Research
    DOI
    10.1021/ie200940f
    ISSN
    08885885
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/12841
    Collection
    • Curtin Research Publications
    Abstract

    The effect of type of inlet conditions on the predictions of EulerianEulerian simulations of a circulating fluidized bed riser has been investigated in both 2D and 3D domains. The 2D simulations were conducted using 3 different inlet configurations: (A) solids entering in radial direction from a two-sided inlet and gas entering axially from the bottom inlet, (B) solid entering axially from a two-sided bottom inlet near the wall and gas entering axially from a bottom inlet at the center, and (C) gas phase entering axially from a two-sided bottom inlet near the wall and solids entering axially from a bottom inlet at the center. In 2D simulations, it was found that both time-averaged axial velocity and solids volume fraction radial profiles were functions of the inlet kinetic energy as well as gas solidmixingpatterns at the inlet. Whereas 2D simulations using boundary conditions A and C showed significant deviations from experimental profiles, the boundary condition B as well as full-scale 3D simulations gave reasonable agreements with experimental observations.

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