Abstract
Changes in the apparent shape of the cloud due to unsteadiness in bubble motion have been investigated theoretically using computer-generated graphics. It has been found that the onset of yaw, surge or sway in the motion leads to gas shedding from the cloud producing lobes of characteristic form behind the bubble. Gas is also transferred into the bubble from outside the original cloud so that, at some stage in the motion, the apparent cloud boundary intersects the bubble boundary. These findings are in qualitative agreement with earlier experimental observations.
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References
Collins, R., 1965, An extension of Davidson’s theory of bubbles in fluidized beds, Chem. Engng Sci., 20, 747.
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Rowe, P.N., Partridge, B.A., and Lyall, E., 1964, Cloud formation around bubbles in gas fluidized beds, Chem. Engng Sci., 19, 973.
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© 1980 Plenum Press, New York
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Collins, R. (1980). The Effect of Some Unsteady Motions on Gas Flow Patterns around a Fluidization Bubble. In: Grace, J.R., Matsen, J.M. (eds) Fluidization. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-1045-7_7
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DOI: https://doi.org/10.1007/978-1-4684-1045-7_7
Publisher Name: Springer, Boston, MA
Print ISBN: 978-1-4684-1047-1
Online ISBN: 978-1-4684-1045-7
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