Heat Transfer Research

ISSN for PRINT: 1064-2285

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2008, Volume39

Issue 6

89 pages

DOI: 10.1615/HeatTransRes.v39.i6

Issue price - $372.00

A. V. Vinogradov
Institute of Thermophysics, Ural Branch of the Russian Academy of Sciences, Ekaterinburg, 620016, Russia

The results of experimental investigation of the dynamics of fluctuations in acoustic cavitation of water and glycerin are presented. Near the radiator surface the structures in interacting vapor-gas bubbles having the form of fractal clusters were formed. Using the method of photometric scanning of transmitted laser radiation, the dynamics of fluctuations was investigated. In the transient regime the range of the power of fluctuations changed inversely proportional to frequency. The distributions of local fluctuations differ from Gaussian ones and reveal the properties of scale invariance. The qualitative behavior of the frequency dependence of the spectral density of fluctuations on change in the power of an ultrasonic radiator was investigated. It is shown that the raise of the high-frequency boundary of the flicker behavior point to the buildup of instability and may serve as a precursor of possible large-scale overshoots.

DOI: 10.1615/HeatTransRes.v39.i6.60 Download article, 519-527 pages

Article price - $40.00

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