The Temperature of Cavitation
- 20 September 1991
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 253 (5026) , 1397-1399
- https://doi.org/10.1126/science.253.5026.1397
Abstract
Ultrasonic irradiation of liquids causes acoustic cavitation: the formation, growth, and implosive collapse of bubbles. Bubble collapse during cavitation generates transient hot spots responsible for high-energy chemistry and emission of light. Determination of the temperatures reached in a cavitating bubble has remained a difficult experimental problem. As a spectroscopic probe of the cavitation event, sonoluminescence provides a solution. Sonoluminescence spectra from silicone oil were reported and analyzed. The observed emission came from excited state C 2 (Swan band transitions, d 3 II g — a 3 II u ), which has been modeled with synthetic spectra as a function of rotational and vibrational temperatures. From comparison of synthetic to observed spectra, the effective cavitation temperature was found to be 5075 ± 156 K.Keywords
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