| Experimental study of transient paths to the extinction in sonoluminescence. | |
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MedLine Citation:
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PMID: 19045640 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An experimental study of the extinction threshold of single bubble sonoluminescence in an air-water system is presented. Different runs from 5% to 100% of air concentrations were performed at room pressure and temperature. The intensity of sonoluminescence (SL) and time of collapse (t(c)) with respect to the driving were measured while the acoustic pressure was linearly increased from the onset of SL until the bubble extinction. The experimental data were compared with theoretical predictions for shape and position instability thresholds. It was found that the extinction of the bubble is determined by different mechanisms depending on the air concentration. For concentrations greater than approximately 30%-40% with respect to the saturation, the parametric instability limits the maximum value of R(0) that can be reached. On the other hand, for lower concentrations, the extinction appears as a limitation in the time of collapse. Two different mechanisms emerge in this range, i.e., the Bjerknes force and the Rayleigh-Taylor instability. The bubble acoustic emission produces backreaction on the bubble itself. This effect occurs in both mechanisms and is essential for the correct prediction of the extinction threshold in the case of low air dissolved concentration. |
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Authors:
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Raúl Urteaga; Damián Dellavale; Gabriela F Puente; Fabián J Bonetto |
Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of the Acoustical Society of America Volume: 124 ISSN: 1520-8524 ISO Abbreviation: J. Acoust. Soc. Am. Publication Date: 2008 Sep |
Date Detail:
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Created Date: 2008-12-02 Completed Date: 2009-02-12 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503051 Medline TA: J Acoust Soc Am Country: United States |
Other Details:
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Languages: eng Pagination: 1490-6 Citation Subset: IM |
Affiliation:
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Laboratorio de Cavitacion y Biotecnologia, Instituto Balseiro-CAB-CONICET, R8402AGP-Av. Bustillo Km. 9,5-San Carlos de Bariloche-Rio Negro, Argentina. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Air* Linear Models Luminescence* Models, Theoretical Pressure Temperature Time Factors Ultrasonics* Water* |
| Chemical | |
Reg. No./Substance:
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7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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