INFLUENCE OF THE DURATION OF THE ULTRASONIC PULSE ON THE THRESHOLD VIBRATION INTENSITY THAT LEADS TO CAVITATIONS IN LIQUIDS WITH DIFFERENT VISCOSITY

R. N. Golykh , G. A. Bobrova , V. N. Khmelev , R. V. Barsukov , D.V. Genne , D.S. Abramenko , V.A. Shakura , G.A. Titov , E.V. Ilchenko
DOI: 10.25699/SSSB.2020.30.62671 Download PDF
Abstract: The article presents the results of theoretical studies of pulsed ultrasonic exposure to a threshold intensity leading to cavitation. A physical and mathematical model is proposed that describes the process of cavitation bubble formation under the influence of pulsed ultrasound (high-frequency sinusoidal oscillations modulated by the amplitude of rectangular pulses), which allows to reveal the dynamics of direct diffusion of a gas dissolved in a liquid into the cavity of a cavitation bubble and, in ultimately, calculate the threshold intensities at which the cavitation bubble begins to collapse, from the duration of the ultrasonic pulse and the viscosity of the liquid.
Index terms: ultrasonic pulse, cavitation, duration, threshold intensity.

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