Interaction of bubbles rising inline in quiescent liquid
© 2017 Elsevier LtdIn the buoyant rise of two bubbles arranged in an inline configuration, the trailing bubble tends to accelerate beyond its terminal velocity, due to its interaction with the wake of the preceding bubble. It is demonstrated that several different interactive behaviours could be obt...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Pergamon
2017
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| Online Access: | http://purl.org/au-research/grants/arc/DP140104510 http://hdl.handle.net/20.500.11937/52824 |
| _version_ | 1848759020288999424 |
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| author | Gumulya, Monica Utikar, Ranjeet Evans, G. Joshi, J. Pareek, V. |
| author_facet | Gumulya, Monica Utikar, Ranjeet Evans, G. Joshi, J. Pareek, V. |
| author_sort | Gumulya, Monica |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2017 Elsevier LtdIn the buoyant rise of two bubbles arranged in an inline configuration, the trailing bubble tends to accelerate beyond its terminal velocity, due to its interaction with the wake of the preceding bubble. It is demonstrated that several different interactive behaviours could be obtained due to this acceleration. Firstly, at low values of Reynolds numbers (Re=?lVtD/µ?35), the inline configuration was found to be stable, and the two bubbles would collide and coalesce due to the velocity difference between the two. Secondly, at higher Re values (Re > 50), vorticity development around the trailing bubble causes it to deviate away from the inline configuration, thus preventing the occurrence of a head-on collision between the two bubbles. The deviation of the bubble was found occur if a certain critical velocity is exceeded by the trailing bubble. The value of the critical velocity was found to decrease with increasing Re values. Further, an increase in Eotvos number (Eo=?lgD2/s) tends to increase the critical velocity, indicating that enhanced bubble deformability actually improves the path stability of the trailing bubble. The interaction of bubbles can therefore significantly influence the tendency of the bubbles to collide and coalesce. |
| first_indexed | 2025-11-14T09:53:14Z |
| format | Journal Article |
| id | curtin-20.500.11937-52824 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:53:14Z |
| publishDate | 2017 |
| publisher | Pergamon |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-528242022-10-12T03:46:44Z Interaction of bubbles rising inline in quiescent liquid Gumulya, Monica Utikar, Ranjeet Evans, G. Joshi, J. Pareek, V. © 2017 Elsevier LtdIn the buoyant rise of two bubbles arranged in an inline configuration, the trailing bubble tends to accelerate beyond its terminal velocity, due to its interaction with the wake of the preceding bubble. It is demonstrated that several different interactive behaviours could be obtained due to this acceleration. Firstly, at low values of Reynolds numbers (Re=?lVtD/µ?35), the inline configuration was found to be stable, and the two bubbles would collide and coalesce due to the velocity difference between the two. Secondly, at higher Re values (Re > 50), vorticity development around the trailing bubble causes it to deviate away from the inline configuration, thus preventing the occurrence of a head-on collision between the two bubbles. The deviation of the bubble was found occur if a certain critical velocity is exceeded by the trailing bubble. The value of the critical velocity was found to decrease with increasing Re values. Further, an increase in Eotvos number (Eo=?lgD2/s) tends to increase the critical velocity, indicating that enhanced bubble deformability actually improves the path stability of the trailing bubble. The interaction of bubbles can therefore significantly influence the tendency of the bubbles to collide and coalesce. 2017 Journal Article http://hdl.handle.net/20.500.11937/52824 10.1016/j.ces.2017.03.013 http://purl.org/au-research/grants/arc/DP140104510 Pergamon restricted |
| spellingShingle | Gumulya, Monica Utikar, Ranjeet Evans, G. Joshi, J. Pareek, V. Interaction of bubbles rising inline in quiescent liquid |
| title | Interaction of bubbles rising inline in quiescent liquid |
| title_full | Interaction of bubbles rising inline in quiescent liquid |
| title_fullStr | Interaction of bubbles rising inline in quiescent liquid |
| title_full_unstemmed | Interaction of bubbles rising inline in quiescent liquid |
| title_short | Interaction of bubbles rising inline in quiescent liquid |
| title_sort | interaction of bubbles rising inline in quiescent liquid |
| url | http://purl.org/au-research/grants/arc/DP140104510 http://hdl.handle.net/20.500.11937/52824 |