Dynamics of fine particles in liquid–solid fluidized beds--颗粒学报PARTICUOLOGY

Liu, D., & Fu, Y. (2007). Dynamics of fine particles in liquid–solid fluidized beds. China Particuology, 5(6), 363–375. https://doi.org/10.1016/j.cpart.2007.08.001

Dynamics of fine particles in liquid–solid fluidized beds

Dayou Liu ^a *, Yuanfang Fu ^a

a Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China

10.1016/j.cpart.2007.08.001

Volume 5, Issue 6, December 2007, Pages 363-375

Received 15 September 2006, Accepted 24 August 2007, Available online 19 November 2007.

E-mail: Dyliu@imech.ac.cn

Highlights

Abstract

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.

Graphical abstract

Keywords

Particulate fluidized bed; Concentration wave; Expansion process; Collapse process; Local Equilibrium Model

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