P1F-1 A Novel Method of Micro Bubble Trapping by Bubble Nonlinear Oscillation

Author

Yamakoshi, Yoshiki

Author_Institution

Fac. of Eng., Gunma Univ., Kiryu

fYear

2006

fDate

2-6 Oct. 2006

Firstpage

1345

Lastpage

1348

Abstract

A novel method of micro bubble trapping by nonlinear bubble oscillation under ultrasonic wave radiation is proposed. Two ultrasonic waves, which have harmonic relation in frequencies, are used in order to produce the Bjerknes force to the bubble. First ultrasonic wave is pumping wave, which has relative high sound pressure. This wave is used for generating nonlinear oscillation of bubble. Second wave is control wave, whose frequency is set to a harmonic frequency of the pumping wave. Two waves are crossed at the area where the bubbles are trapped. The pressure gradient of the control wave in conjunction with a harmonic component of bubble nonlinear oscillation produces the Bjerknes force to the bubble, making multiple bubble traps with narrow separation of wavelength of the control wave. Basic experiments are carried out using an ultrasonic contrast agent bubble

Keywords

bubbles; ultrasonic propagation; ultrasonic waves; Bjerknes force; bubble nonlinear oscillation; control wave; microbubble trapping; multiple bubble traps; pumping wave; ultrasonic contrast agent bubble; ultrasonic wave radiation; Acoustic transducers; Acoustic waves; Drug delivery; Force control; Nonlinear dynamical systems; Pharmaceutical technology; Pressure control; Resonance; Resonant frequency; Ultrasonic transducers;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2006. IEEE

Conference_Location

Vancouver, BC

ISSN

1051-0117

Print_ISBN

1-4244-0201-8

Electronic_ISBN

1051-0117

Type

conf

DOI

10.1109/ULTSYM.2006.347

Filename

4152203