Acoustic Emission from Micro Bubbles in Ultrasound Field

Yoshizawa, Shin and Sugiyama, Kazuyasu and Matsumoto, Yoichiro (2001) Acoustic Emission from Micro Bubbles in Ultrasound Field. In: CAV 2001: Fourth International Symposium on Cavitation, June 20-23, 2001, California Institute of Technology, Pasadena, CA USA.

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Abstract

Ultrasound is widely applied in the clinical field. It is essential to take a real understanding of dynamics of micro bubbles in these applications. But it has not been clarified yet. In this paper we numerically simulate a single micro bubble and bubble cloud, which consists of micro bubbles, in water. In the case of a single bubble, we conduct FFT analysis of acoustic pressure emitted from the bubble in ultrasound field, and we investigate the amplitude of second-harmonics and sub-harmonics. In the case of bubble cloud, we observe that pressure at the center of cloud drastically changes depending on the frequency of ultrasound.

EPrint Type:	Conference or Workshop Item (Lecture)
Uncontrolled Keywords:	ultrasound, micro bubble, bubble cloud, numerical simulation
Subjects:	All Records Session A2 Noise and Luminescence
ID Code:	380
Deposited By:	Shin Yoshizawa
Deposited On:	01 June 2001
Record Number:	CAV2001:A2.003
Official Persistent URL:	http://resolver.caltech.edu/CAV2001:A2.003
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