Author: "Voronin, D. V." / Topic: fluid dynamics - Searchworks@Jio Institute Digital Library Search Results

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Start Over Author "Voronin, D. V." Topic fluid dynamics

Author: Voronin, D. V. and Teslenko, V. S.
Subjects: *NONLINEAR acoustics, *CAVITATION noise, *FLUID dynamics, *NONLINEAR theories, *SOUND waves
Abstract: The generation of bubbles behind an acoustic pulse is theoretically and experimentally investigated in the paper. It was found out that at growth of the amplitude of falling wave two different modes of cavitations development occur: “chain” mechanism of duplication of cavitations germs is replaced by mechanism of “real” liquid cavitations, when the liquid is initially filled with a set of cavitations nuclei and apparent bubble occurrence is caused by different periods of nucleus growth from them. [ABSTRACT FROM AUTHOR]
Published: 2008
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Author: Voronin, D. V., Sankin, G. N., Teslenko, V. S., Mettin, R., and Lauterborn, W.
Subjects: *OSCILLATIONS, *FLUID dynamics, *HYDRODYNAMICS, *TWO-phase flow
Abstract: Wave interaction of bubbles in a cavitation cluster is studied theoretically and experimentally. It is found that two groups of bubbles with different phases of oscillations and collapse time are formed at the early stage of bubble‐cluster formation. It is shown that small bubbles accumulating energy in the initial pulsed acoustic wave collapse in the field of internal positive pressure of the cluster. A secondary compression wave generated by inertial expansion of large bubbles is determined by means of numerical simulation and registered experimentally. The amplitude of this wave is comparable to the amplitude of the initial pulse. A decrease in the oscillation period and strengthening of the microbubble collapse are observed in the cluster under pulsed compression. [ABSTRACT FROM AUTHOR]
Published: 2003
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