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

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Buijtenen van, M.S. and Deen, N.G. and Antonyuk, S. and Heinrich, S. and Kuipers, J.A.M. (2008) A discrete particle simulation study on the influence of restitution coefficient on spout fluidized bed dynamics. In: 9th International Conference on Circulating Fluidized Beds , May, 13 – 16, 2008, Hamburg.

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Abstract: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.
Item Type:Conference or Workshop Item
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Link to this item:http://purl.utwente.nl/publications/67405
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