期刊
CHINA PARTICUOLOGY
卷 5, 期 6, 页码 363-375出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.cpart.2007.08.001
关键词
particulate fluidized bed; concentration wave; expansion process; collapse process; local equilibrium model
On the basis of the Local Equilibrium Model (LEM), fine particles with large Richardson-Zaki exponent n show, under certain conditions during bed expansion and collapse, different dynamic behavior from particles with small n. For an expansion process there may be a concentration discontinuity propagating upward from the distributor, and, on the contrary, for a collapse process there may be a progressively broadening and upward-propagating continuous transition zone instead of discontinuity. The predictions of the bed height variation and the discontinuity trace have been validated experimentally. (c) 2007 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
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