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On the origin of bubbles in gas-fluidized beds

✍ Scribed by J. Verloop; P.M. Heertjes

Publisher: Elsevier Science
Year: 1974
Tongue: English
Weight: 632 KB
Volume: 29
Category: Article
ISSN: 0009-2509
DOI: 10.1016/0009-2509(74)80108-9

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✦ Synopsis

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gas-fluidized beds bubbling starts when the voids formed by the oscillating bottom layer of the bed exceed a minimal size. The so-called vibration criterion derived predicts the porosity at the bubble point in close agreement with the experimental data. Comparison of the other criteria proposed in the literature on the basis of the transition number N, = a@, -pt)/~ shows that the voids formed under the critical conditions will grow and that stable bubbles can exist.

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