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Bubble sizes produced by shear and turbulence in a bubble column

โœ Scribed by D.A. Lewis; J.F. Davidson

Publisher
Elsevier Science
Year
1983
Tongue
English
Weight
646 KB
Volume
38
Category
Article
ISSN
0009-2509

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โœฆ Synopsis

Measurements of bubble sizes for co-current upward air-water flow in a recirculating loop bubble column are described. The bubble sizes were determined with a two electrode conductivity detector. The effectiveness of two different designs of baflle in reducing the bubble size is assessed. The first type of bal%e was a perforated plate placed across the air-water flow, which broke the bubbles by the shear flow and turbulence it caused. The measurements with this type of baffle are consistent with a recently developed theory of bubble break-up in shear flow. The second type of baffle consisted of a series of wire arrays placed across the flow. These broke the bubbles by a cutting action. The rate of bubble coalescence downstream of this baffle was determined, over a range of gas hold-up.

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