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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Postema, M. Marmottant, P. Lancee, C.T. Versluis, M. Hilgenfeldt, S. de Jong, N. |
| Copyright Year | 2005 |
| Description | Author affiliation: Depl. of Exp. Echocardiography, Erasmus MC, Rotterdam, Netherlands (Postema, M.) |
| Abstract | When gas bubbles collide, the following stages of bubble coalescence have been reported: flattening of the opposing bubble surfaces prior to contact, drainage of the interposed liquid film toward a critical minimal thickness, rupture of the liquid film, and formation of a single bubble. During insonification, expanding contrast agent microbubbles may collide with each other, resulting in coalescence or bounce. In this study, we investigate the validity of the film drainage formalism for expanding free bubbles, by subjecting rigid-shelled contrast agent microbubbles to ultrasound, in order to release gas, and photograph the coalescence of these free gas bubbles. As with colliding bubbles, bubble surface flattening is related to the Weber number. Only inertial film drainage between free interfaces explains the observed coalescence times. In accordance with theory, smaller bubble fragments coalesce on very small time scales, while larger bubbles bounce off each other. |
| Starting Page | 1 |
| Ending Page | 4 |
| File Size | 534674 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780384121 |
| ISSN | 10510117 |
| DOI | 10.1109/ULTSYM.2004.1417653 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-08-23 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Ultrasonic imaging Equations Surface tension Echocardiography Cardiology Physics Photography Encapsulation Surface cracks Ferroelectric materials |
| Content Type | Text |
| Resource Type | Article |
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