Comparison of continuum models using the kinetic theory of granular flow with discrete particle models and experiments: extent of particle mixing induced by bubbles

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Bokkers, G.A. and Sint Annaland, M. van and Kuipers, J.A.M. (2004) Comparison of continuum models using the kinetic theory of granular flow with discrete particle models and experiments: extent of particle mixing induced by bubbles. In: Proceedings of Fluidization XI (pp. pp. 187-194).

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Abstract:The bubble formation and extent of particle mixing induced by a single bubble injected in a mono-disperse uidised bed at incipient
uidisation conditions has been studied with a Two-Fluid continuum Model (TFM) using the Kinetic Theory of Granular Flow (KTGF) and com-
pared with experiments and simulation results obtained from a Discrete Particle Model (DPM). The eect of dierent gas-particle drag models and frictional viscosity models on the bubble behaviour and extent of particle mixing has been assessed. To describe the extent of particle
mixing well, a frictional viscosity model needs to be included, however, the currently available frictional viscosity models need further improvement.
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