✦ LIBER ✦

A unified model for particulate expansion of fluidised beds and flow in fixed porous media

✍ Scribed by P.U. Foscolo; L.G. Gibilaro; S.P. Waldram

Publisher: Elsevier Science
Year: 1983
Tongue: English
Weight: 846 KB
Volume: 38
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(83)80045-1

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✦ Synopsis

AMract-A model is derived for a fluidised bed that enables its steady state particulate expansion to be predicted as a function of superficial velocity from the initial backed bed) condition to the final fully expanded (single suspended particle) state. These predictions are in good agreement with the empirical correlations and functional dependencies found by Richardson and Zaki[ I, 21 over the full range of flow conditions. The derivations incorporate revisions in the form of the pressure drop correlations for flow in porous media that are justified on theoretical and empirical grounds. fN-l-RODUCTION The relationship between superficial liquid velocity, u, and voidage, t, in a fluid&d bed is well described by the equation, U --_c".

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