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Multiscale numerical simulation based on Caflisch model to interpret power-induced quenching for sonochemical
Ryuya Hayashi1, Takuya Yamamoto1
1Department of Chemical Engineering, Graduate School of Engineering, Osaka Metropolitan University, 1-1, Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.
Ultrasonics Sonochemistry
|June 10, 2026
Summary
Power-induced quenching in sonochemical reactions is explained by numerical simulations. Increased ultrasonic power distorts sound waves, reducing bubble collapse temperatures and reaction rates, a phenomenon driven by sound pressure amplitude.
Area of Science:
- Acoustics
- Chemical Engineering
- Computational Physics
Background:
- Sonochemical reactions are sensitive to ultrasonic power.
- Power-induced quenching describes a decrease in reaction rates at higher ultrasonic power.
- Understanding this phenomenon is crucial for optimizing sonochemical processes.
Purpose of the Study:
- To interpret the phenomenon of power-induced quenching in sonochemical reactions.
- To investigate the role of acoustic bubbles and sound wave distortion.
- To elucidate the influence of ultrasonic power on bubble collapse dynamics.
Main Methods:
- Multiscale numerical simulation based on the Caflisch model.
- Modeling acoustic bubble interactions with ultrasonic waves.
- Analyzing sound emission, absorption, and waveform distortion.
Main Results:
- Ultrasound waveform distortion generates harmonics and broadband noise.
- High distortion leads to decreased maximum temperatures during bubble collapse, causing quenching.
- Sound pressure amplitude is the predominant factor influencing temperature decrease and sound emission/absorption.
- Standing waves transition to traveling waves at high amplitudes, affecting bubble temperature distribution.
Conclusions:
- Numerical simulations successfully explain power-induced quenching.
- Acoustic bubble behavior and sound wave dynamics are key to understanding quenching.
- Sound pressure amplitude significantly impacts sonochemical reaction efficiency.
