Solids Mixing in the Bottom Zone of Fluidized Beds
作者： D. Y. Liu , X. P. Chen , C. Liang , C. S. Zhao
DOI: 10.1007/978-3-642-02682-9_69
关键词:
摘要: In the literature, values of lateral solids dispersion coefficient (D sr ) in dense fluidized beds determined by different authors are scattered, ranging from 0.0001 to 0.2m2/s. The present work is aimed investigate reasons for divergence through CFD-DEM simulations. Results indicate that particle trajectory shows multi-scale characteristics: macro-scale movement following gross circulation emulsion phase, and local-scale induced bubbles closing it. effects fluidizing velocity bed width on D examined. It deduced embodies mixing mechanisms, which makes difficult predict or scale up.
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