Comparisons between multibubble and single‐bubble sonoluminescence
نویسندگان
چکیده
منابع مشابه
Temperature inhomogeneity during multibubble sonoluminescence.
When a liquid is subjected to high-intensity ultrasound, bubbles are formed, grow, and implosively collapse. This phenomenon of acoustic cavitation generates both chemical reactions (i.e., sonochemistry) and the emission of light (i.e., sonoluminescence, SL). It is generally agreed that both sonochemistry and sonoluminescence result from the intense compressional heating of gas and vapor inside...
متن کاملTemperature of Multibubble Sonoluminescence in Water
Sonoluminescence (SL) spectra were collected from water doped with several organic liquids at low concentrations. Most of the organic substances studied show emission from C2 and an overall decrease in the intensity relative to SL from pure water. This decrease is due to the consumption by the organic substrates of hydroxyl radicals and other incipient emitting species produced during sonolysis...
متن کاملInfluence of degree of gas saturation on multibubble sonoluminescence intensity.
The influence of the degree of saturation (DOS) of a gas in a solution on the intensity of multibubble sonoluminescence (MBSL) excited by ultrasound with a frequency of 261 kHz is investigated at various ultrasonic powers and with different concentrations of ethanol, which is added as a volatile solute. At relatively low powers and a high DOS, low ethanol concentrations give higher sonoluminesc...
متن کاملA comparison between multibubble sonoluminescence intensity and the temperature within cavitation bubbles.
Cavitation bubble temperatures have been measured using a methyl radical recombination method and compared with the changes in the sonoluminescence intensity in aqueous ethanol solutions over a range of concentrations. Whereas the sonoluminescence intensity was decreased by more than 90% at low ethanol concentrations (<0.1 M), the measured bubble temperatures seem to be unaffected at this level...
متن کاملExtreme conditions during multibubble cavitation: Sonoluminescence as a spectroscopic probe.
We review recent work on the use of sonoluminescence (SL) to probe spectroscopically the conditions created during cavitation, both in clouds of collapsing bubbles (multibubble sonoluminescence, (MBSL)) and in single bubble events. The effective MBSL temperature can be controlled by the vapor pressure of the liquid or the thermal conductivity of the dissolved gas over a range from ∼1600 to ∼900...
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ژورنال
عنوان ژورنال: The Journal of the Acoustical Society of America
سال: 1994
ISSN: 0001-4966
DOI: 10.1121/1.411071