Journal
PARTICUOLOGY
Volume 11, Issue 6, Pages 636-646Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.partic.2013.01.008
Keywords
Dual legs; Fluidized bed; Solid exchange; Discrete element method; Power spectrum density
Funding
- National Science and Technology Support Program of China [2012BAA02B00]
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The CFD-DEM model was developed to simulate solid exchange behavior between two half beds in a bench-scale two-dimensional dual-leg fluidized bed (DL-FB). Power spectrum density (PSD) analysis was applied to obtain the dominant frequency (F) of the simulated differential particle number (Delta P-LR) between the two half beds. Effects of fluidization velocity (u) and bed material inventory (H) on the solid exchange behavior were studied using the CFD-DEM model. Not only snapshots of the simulated particle flow patterns using the OpenGL code but also the dominant frequency of Delta P-LR was similar to the experimental results.The simulation results show that higher fluidization velocity assists the exchange of more particles between the two half beds, but the dispersion of clusters on the bed surface into single particles decreases the cluster exchange frequency. A greater bed material inventory results in more intense cluster exchange. The cluster exchange frequency decreases with an increase of the bed material inventory. (C) 2013 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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