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Study of Attenuation and Dispersion of Ultrasound in Bubbly Liquids  

Choi, Young-Soo (연세대학교 기계공학부)
Ohm, Won-Suk (연세대학교 기계공학부)
Publication Information
The Journal of the Acoustical Society of Korea / v.29, no.4, 2010 , pp. 251-257 More about this Journal
Abstract
This paper deals with the attenuation and dispersion of ultrasound in bubbly liquids. Bubble clouds in liquid are formed by a variety of mechanisms, leading to different bubble sizes and spectra. Our aim is to investigate how bubble sizes and spectra affect the attenuation and dispersion characteristics of bubbly liquids. Especially, we highlight the attenuation and dispersion behaviors of nano-bubbles, which have not been reported elsewhere. Computations show that the attenuation and dispersion characteristics of bubbly liquids depend heavily on the quality factors of constituent bubbles. The present study is expected to facilitate in-depth understanding of sound propagation in bubbly liquids.
Keywords
Ultrasound; Bubble Cloud; Attenuation; Dispersion; Phase Velocity;
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