Investigation of influence of bubble-bubble interactions on the hydrodynamics of bubbling gas-solid fluidized beds using the discrete bubble model

J.A. Laverman, M. van Sint Annaland, J.A.M. Kuipers

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    Abstract

    To investigate the hydrodynamic behaviour of industrial scale bubbling fluidised bed reactors, a 3D Discrete Bubble Model (DBM) has been developed. In the DBM, an Euler-Lagrange model, the bubbles are treated as discrete elements and the bubble trajectories are tracked individually, while the emulsion phase is considered as a continuum and is described with the continuity and Navier-Stokes equations. The main advantage of the DBM is that it fully accounts for the two-way coupling, allowing computation of the prevailing macroscopic circulation patterns in large scale gas-fluidised beds. In this paper, we have examined the effect of bubble-bubble (wake) interactions on the macro-scale velocity profiles using the DBM. It has been found that the extent of the macroscopic circulation is significantly increased by the bubble-bubble interaction forces
    Original languageUndefined
    Title of host publicationConference Proceedings of CFD-2006
    Place of PublicationMelbourne
    Pages-
    Number of pages6
    Publication statusPublished - 13 Dec 2007

    Keywords

    • METIS-236213
    • IR-69263

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