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Type: Journal article
Title: Granular temperature distribution in a gas fluidized bed of hollow microparticles prior to onset of bubbling
Author: Xie, L.
Biggs, M.
Glass, D.
Egelhaaf, S.
Petekidis, G.
Citation: Europhysics Letters: a letters journal exploring the frontiers of physics, 2006; 74(2):268-274
Publisher: E D P Sciences
Issue Date: 2006
ISSN: 0295-5075
Statement of
L. Xie, M. J. Biggs, D. Glass, A. S. McLeod, S. U. Egelhaaf and G. Petekidis
Abstract: It has been unclear whether bubbles are required to induce particle velocity fluctuations in gas fluidized beds (FBs). We show that bubbles are not necessary by applying diffusing-wave spectroscopy to particles whose minimum bubbling velocity is approximately 5 times that of the minimum fluidization velocity. Fluctuations are first observed at or just above fluidization and increase in magnitude with superficial velocity. The distribution of velocity fluctuations in the bed is also presented: they are symmetrical about the centreline where they are maximal and increase with height above the distributor.
DOI: 10.1209/epl/i2005-10526-y
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Appears in Collections:Aurora harvest 5
Chemical Engineering publications
Environment Institute publications

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