The proceedings of the JSME annual meeting
Online ISSN : 2433-1325
2002.1
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Transition Frequencies of Acoustically Coupled Gas Bubbles : Investigation Using the Direct Numerical Simulation Technique
Masato IDA
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Pages 13-14

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Abstract
This paper investigates the transition frequencies of acoustically couplet gas bubbles by employing a direct numerical simulation technique which is an improved variant of the CIP-CUP method. Recent theoretical studies by the present author showed that gas bubbles interacting in an acoustic field have an undiscovered characteristic frequency, named "transition frequency", which reverses the pulsation phases of bubbles without causing resonance response. In more recent study, it was shown that this characteristic frequency might play an important role in the sign reversal of the secondary Bjerknes force which sometimes result in a stable structure formation of bubbles in an acoustic field. The numerical results presented in this paper have demonstrated that the characteristic frequency indeed exists.
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© 2002 The Japan Society of Mechanical Engineers
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