Experimental study on coalescence of fog droplets in cloud chamber under low-frequency sound waves

Article Engineering, Multidisciplinary

Cloud and precipitation interference by strong low-frequency sound wave

Wei JiaHua et al.

Summary: A novel acoustic interference technology using strong low-frequency sound waves is proposed in this study, which can be remotely controlled at low cost. It lays the foundation for further research on atmosphere interference technology based on low frequency strong sound waves.

SCIENCE CHINA-TECHNOLOGICAL SCIENCES (2021)

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Article Meteorology & Atmospheric Sciences

Rapid Droplet Coalescence Produced by Thunder

Samuel Temkin

Summary: This article examines whether thunderclaps can cause droplet coalescence in natural clouds by inducing relative velocities between different-sized droplets. Results show that thunder events can produce significant changes in mean droplet diameters in a few seconds, much faster than other coalescence mechanisms.

JOURNAL OF THE ATMOSPHERIC SCIENCES (2021)

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Article Acoustics

Interaction between strong sound waves and cloud droplets: Cloud chamber experiment

Jun Qiu et al.

Summary: The study demonstrates the significant impact of sound wave frequency and sound pressure level on cloud droplet agglomeration, showing that higher SPL and appropriate frequency are conducive to cloud droplet coagulation. The threshold SPL for effective agglomeration increases gradually with the sound frequency.

APPLIED ACOUSTICS (2021)

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Article Environmental Sciences

Numerical Simulation of Condensation of Natural Fog Aerosol under Acoustic Wave Action

Chang Liu et al.

Summary: This study summarizes the mathematical model of acoustic condensation and proposes an improved acoustic condensation kernel function. Different condensation mechanisms are compared through numerical simulation. Results show that acoustic effect significantly improves droplet condensation efficiency, different frequencies of sound waves have varying effects on droplet condensation, and sound pressure level and initial concentration are positively correlated with condensation efficiency, with a critical particle size present.

AEROSOL AND AIR QUALITY RESEARCH (2021)

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Article Engineering, Chemical