A discrete particle simulation study on the influence of restitution coefficient on spout fluidized bed dynamics

M.S. van Buijtenen, N.G. Deen, S. Antonyuk, S. Heinrich, J.A.M. Kuipers

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    In this paper the influence of the normal restitution coefficient on the bed dynamics during different flow regimes was studied using the discrete element model. The three flow regimes comprise the intermediate/spout-fluidization, spouting-with-aeration regime and the jetin- fluidized-bed. It is shown that with increase of the restitution coefficient the average bed height decreases for all flow regime cases. To study the influence of the granule impact velocity and the liquid film on the wall surface the free-fall experiments in the velocity range of 0.5- 4.5 m/s were performed with spherical γ-Al2O3 granules. During the free-fall tests, the impact angle from 0° to 80° and the viscosity of thin liquid film in the range of 1-300 mPa·s were varied.
    Original languageEnglish
    Number of pages6
    Publication statusPublished - 2008
    Event9th International Conference on Circulating Fluidized Beds, CFB-9 2008 - Hamburg, Germany
    Duration: 13 May 200816 May 2008
    Conference number: 9


    Conference9th International Conference on Circulating Fluidized Beds, CFB-9 2008
    Abbreviated titleCFB-9

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