Hydrodynamic predictions of dense gas-particle flows using a second-order-moment frictional stress model

Y. Liu (Corresponding Author), X. Liu, Sirpa Kallio, L. Zhou

    Research output: Contribution to journalArticlepeer-review

    14 Citations (Scopus)

    Abstract

    Based on the Eulerian–Eulerian two-fluid continuum approach, an improved unified second-order-moment two-phase turbulence model combining with the kinetic theory of particle collision frictional stress model is developed to simulate the dense gas–particle flows in downer, where the effective coefficient of restitution is incorporated into the particle–particle collision. The interaction term between gas and particle turbulence is fully taken into account by the transport equation of two-phase stress correlation. Hydrodynamics of high density particle flow, measured by Wang et al. [27] are predicted and the simulated results are in good agreement with experimental data. On the conditions of considering the realistic energy dissipation due to frictional stress, particle concentration and particle axial averaged velocity are closely the measured and they are better than without frictional stress model. Furthermore, the particle Reynolds stress is redistributed and the particle temperature is reduced. Effect of frictional stress leads to increase obviously the collision frequency at the outlet and inlet regions and the magnitude of frequency of particle collisions is 102.
    Original languageEnglish
    Pages (from-to)504-511
    Number of pages8
    JournalAdvanced Powder Technology
    Volume22
    Issue number4
    DOIs
    Publication statusPublished - 2011
    MoE publication typeA1 Journal article-refereed
    EventChemeca 2010 - Adelaide, Australia
    Duration: 26 Sep 201029 Sep 2010

    Keywords

    • Dense gas-particle two-phase turbulence
    • downer
    • frictional stress
    • hydrodynamics simulation
    • unified second-order-moment model

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