Bulanov, A.V.; Sosedko, E.V.; Bulanov, V.A.; Korskov, I.V. Cavitation Strength, Acoustic Nonlinearity, and Gas Bubble Distribution in Water. Fluids2024, 9, 3.
Bulanov, A.V.; Sosedko, E.V.; Bulanov, V.A.; Korskov, I.V. Cavitation Strength, Acoustic Nonlinearity, and Gas Bubble Distribution in Water. Fluids 2024, 9, 3.
Bulanov, A.V.; Sosedko, E.V.; Bulanov, V.A.; Korskov, I.V. Cavitation Strength, Acoustic Nonlinearity, and Gas Bubble Distribution in Water. Fluids2024, 9, 3.
Bulanov, A.V.; Sosedko, E.V.; Bulanov, V.A.; Korskov, I.V. Cavitation Strength, Acoustic Nonlinearity, and Gas Bubble Distribution in Water. Fluids 2024, 9, 3.
Abstract
Practically important properties of real liquids, including seawater, are their nonlinear properties, which include a nonlinear acoustic parameter, as well as cavitation strength – a rupture of the continuity of a liquid at high intensities in an acoustic wave. The manifestation of nonlinear effects is greatly facilitated by the presence of various nuclei in the liquid – gas bubbles, foreign particles, and other inclusions of various origins. For practical applications, it is important to study the properties of real liquids with inclusions in them. Due to the difficulties of measuring cavitation strength by acoustic methods, other methods are being sought. It is proposed to use an optoacoustic method associated with the use of laser radiation that causes optical breakdown - optical cavitation, that accompanied by a strong sound generation effect. The connection between optical breakdown thresholds and acoustic cavitation thresholds has been established, which can later be used to identify cavitation thresholds at high static pressures (at great depths in the sea), where the use of acoustic emitters is extremely difficult. The paper studies the bubble size distribution function in seawater, combined with studies of the acoustic nonlinearity parameter and cavitation strength at various depths. The interrelation of these characteristics for seawater is shown.
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