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The rising velocity of bubbles in two-dimensional fluidised beds

✍ Scribed by D.L. Pyle; D. Harrison

Publisher
Elsevier Science
Year
1967
Tongue
English
Weight
407 KB
Volume
22
Category
Article
ISSN
0009-2509

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✦ Synopsis

The rising velocity of an isolated bubble in a "two-dimensional" air-fluidised bed has been measured and found to be wel1 described by the relation, ub= 15'9Abf cm/sec, where Ab is the area of the bubble measured in cm*. This predicts a smaller rising velocity than the corresponding @avies and Taylor) expression for a gas bubble rising in a "two-dimensional'* inviscid liquid, and this differente may be ascribed to the viscosity of the fluidised bed.

The rate of rise of a bubble rising in a cloud of bubbles has also been measured, and the results are in reasonable agreement with the work of Nicklin on normal two-phase flow.

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