File:Acoustic-induced drag on a bubble (IA acousticinducedd1094513588).pdf
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Summary
[edit]Acoustic-induced drag on a bubble
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| Author |
Chan, Eugene Joseph Pilpa |
| Title |
Acoustic-induced drag on a bubble |
| Publisher |
Monterey, California: Naval Postgraduate School |
| Description |
This work reports experiments that show that the drag on a bubble can be modified by the presence of isotropic, homogeneous broadband acoustic noise, when the band overlaps the bubble's resonance width. This constitutes an acoustic analog to the Einstein-Hopf drag on an electromagnetic dipole oscillator in the presence of isotropic and homogeneous electromagnetic fluctuations. In contrast with the electromagnetic Einstein-Hopf drag, band- limited acoustic noise can reduce the drag when the lower frequency of the spectrum coincides with the resonant frequency of the bubble. The modification of the drag experienced by a bubble in the presence of acoustic noise suggests possible applications to bubble migration and to heat transfer in a two-phase fluid. Depending on its size (i.e., resonant frequency), a bubble will experience less or more drag when the fluid is insonified with broadband noise, thereby modifying and possibly controlling bubble migration and heat transfer. Subjects: |
| Language | English |
| Publication date | March 1999 |
| Current location |
IA Collections: navalpostgraduateschoollibrary; fedlink |
| Accession number |
acousticinducedd1094513588 |
| Source | |
| Permission (Reusing this file) |
Approved for public release, distribution unlimited. |
Licensing
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This work is in the public domain in the United States because it is a work prepared by an officer or employee of the United States Government as part of that person’s official duties under the terms of Title 17, Chapter 1, Section 105 of the US Code.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | ||
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
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| current | 22:36, 13 July 2020 |  | 1,275 × 1,650, 41 pages (1.94 MB) | Fæ (talk | contribs) | FEDLINK - United States Federal Collection acousticinducedd1094513588 (User talk:Fæ/IA books#Fork8) (batch 1993-2020 #5347) |
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