dc.contributor.author |
Kirkpatrick, Robert |
en |
dc.contributor.author |
Lockett, MJ |
en |
dc.date.accessioned |
2017-11-15T01:12:44Z |
en |
dc.date.issued |
1974-12 |
en |
dc.identifier.citation |
Chemical Engineering Science 29(12):2363-2373 Dec 1974 |
en |
dc.identifier.issn |
0009-2509 |
en |
dc.identifier.uri |
http://hdl.handle.net/2292/36420 |
en |
dc.description.abstract |
Experiments have been carried out in which a cloud of air bubbles has been prevented from rising by downflowing water in a tube. High speed photography revealed an almost complete absence of bubble coalescence. This has been attributed to the large approach velocities of bubbles in the cloud. Further experiments in which a single bubble has been allowed to coalesce with a plane air—water interface have demonstrated the effect more clearly. Two basic types of bubble coalescence have been recognised depending on the approach velocity of the bubbles. At a low approach velocity, bubble coalescence is rapid, but coalescence times are considerably increased at large approach velocities. For pure liquids, a theory is put forward which shows that at low approach velocities film rupture can occur before the approaching bubbles are brought to rest. At large approach velocities the bubbles are brought to rest before rupture occurs. In the latter case bubble bounce can occur and the total coalescence time is thereby considerably increased. Based on observed approach velocities in a stationary bubble cloud, it is suggested that large approach velocities in a bubble column may be an important factor in limiting bubble coalescence. |
en |
dc.publisher |
Elsevier |
en |
dc.relation.ispartofseries |
Chemical Engineering Science |
en |
dc.rights |
Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated. Previously published items are made available in accordance with the copyright policy of the publisher. |
en |
dc.rights.uri |
https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htm |
en |
dc.title |
The influence of approach velocity on bubble coalescence |
en |
dc.type |
Journal Article |
en |
dc.identifier.doi |
10.1016/0009-2509(74)80013-8 |
en |
pubs.issue |
12 |
en |
pubs.begin-page |
2363 |
en |
pubs.volume |
29 |
en |
dc.rights.holder |
Copyright: Elsevier |
en |
pubs.end-page |
2373 |
en |
pubs.publication-status |
Published |
en |
dc.rights.accessrights |
http://purl.org/eprint/accessRights/RestrictedAccess |
en |
pubs.subtype |
Article |
en |
pubs.elements-id |
645697 |
en |
pubs.org-id |
Engineering |
en |
pubs.org-id |
Chemical and Materials Eng |
en |
dc.identifier.eissn |
1873-4405 |
en |
pubs.record-created-at-source-date |
2017-11-15 |
en |