Near threshold nucleation and growth of cavitation bubbles generated with a picosecond laser

Agrež, Vid; Mur, Jaka; Petelin, Jaka; Petkovšek, Rok

doi:10.1016/j.ultsonch.2022.106243

Cited by 13 publications

(1 citation statement)

References 30 publications

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“…Researchers strive to regulate the intensity of these shock waves to prevent material damage by adjusting various parameters. Positive outcomes have been demonstrated in various applications such as using controlled picosecond laser pulses to create low-intensity cavitation shock waves in the laser treatment of biological tissues [3] . Moreover, the shock wave effect has been utilized in diverse fields including shock wave lithotripsy [4,5] , wafer surface cleaning [6] , textile cleaning [7][8][9] , and solid surface preparation [10] .…”

Section: Introductionmentioning

confidence: 99%

Numerical study of cavitation shock wave emission in the thin liquid layer by power ultrasonic vibratory machining

Gong,

Zhu,

et al. 2024

Preprint

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In the field of power ultrasonic vibration processing, the thin liquid layer nestled between the tool head and the material serves as a hotbed for cavitation shock wave emissions that significantly affect the material's surface. The precise manipulation of these emissions presents a formidable challenge, stemming from a historical deficit in the quantitative analysis of both the ultrasonic enhancement effect and the shock wave intensity within this niche environment. Our study addresses this gap by innovatively modifying the Gilmore-Akulichev equation, laying the groundwork for a sophisticated bubble dynamics model and a pioneering shock wave propagation model tailored to the thin liquid layer domain. Firstly, our study investigated the ultrasound enhancement effect under various parameters of thin liquid layers, revealing an amplification of ultrasound pressure in the thin liquid layer area by up to 7.47 times. The mathematical model was solved using the sixth-order Runge-Kutta method to examine shock wave velocity and pressure under different conditions. our study identified that geometric parameters of the tool head, thin liquid layer thickness, ultrasonic frequency, and initial bubble radius all significantly influenced shock wave emission. At an ultrasonic frequency of 60 kHz, the shock wave pressure at the measurement point exhibited a brief decrease from 182.6 MPa to 179.5 MPa during an increase. Furthermore, rapid attenuation of the shock wave was found within the range of R0-3R0 from the bubble wall. This research model aims to enhance power ultrasonic vibration processing technology, and provide theoretical support for applications in related fields.

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