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Nonlinear transient bubble oscillations

Nonlinear transient bubble oscillations
Nonlinear transient bubble oscillations
The investigation considers issues associated with transient regime of nonlinear bubble oscillations. The nonlinear response of a gas bubble to a low frequency pumping wave results in parametrically-generated shape oscillations above a well-defined threshold. This may be detected through insonification of the bubble by a high-frequency imaging wave, leading to the subharmonic and fundamental combinations frequency signals. The duration of the transient regimes of these two signals are very different. In this study the complete theory of the transient processes near the threshold of excitation of distortion modes has been derived. The detection of the subharmonic component is a general characteristic of cavitation and other nonlinear phenomena in liquids containing phase inclusions. As first observed by Neppiras, a small subharmonic component is also observed below threshold, so that the growth of this spectral component is not, strictly speaking, of a threshold character. The explanation proposed involves the analysis of transient processes near a subharmonic resonance. In this domain the ring up times of fundamental frequency signal can be greater than the duration of the pump pulse, and the corresponding component in the radiation spectrum can be interpreted as the appearance of subharmonic component below threshold.
102-103
International Symposium on Nonlinear Acoustics
Maksimov, A.
a25bc59b-3b57-4426-b16d-0f54de7aa21c
Sosedko, E.V.
4ddda9de-88af-4b15-a98e-b613c21934ad
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Maksimov, A.
a25bc59b-3b57-4426-b16d-0f54de7aa21c
Sosedko, E.V.
4ddda9de-88af-4b15-a98e-b613c21934ad
Leighton, T.G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae

Maksimov, A., Sosedko, E.V. and Leighton, T.G. (2002) Nonlinear transient bubble oscillations. In, Abstracts of the 16th International Symposium on Nonlinear Acoustics, Moscow, Russia, 19-23 August 2002. 16th International Symposium of Nonlinear Acoustics (18/08/02 - 22/08/02) Moscow, Russia. International Symposium on Nonlinear Acoustics, pp. 102-103.

Record type: Book Section

Abstract

The investigation considers issues associated with transient regime of nonlinear bubble oscillations. The nonlinear response of a gas bubble to a low frequency pumping wave results in parametrically-generated shape oscillations above a well-defined threshold. This may be detected through insonification of the bubble by a high-frequency imaging wave, leading to the subharmonic and fundamental combinations frequency signals. The duration of the transient regimes of these two signals are very different. In this study the complete theory of the transient processes near the threshold of excitation of distortion modes has been derived. The detection of the subharmonic component is a general characteristic of cavitation and other nonlinear phenomena in liquids containing phase inclusions. As first observed by Neppiras, a small subharmonic component is also observed below threshold, so that the growth of this spectral component is not, strictly speaking, of a threshold character. The explanation proposed involves the analysis of transient processes near a subharmonic resonance. In this domain the ring up times of fundamental frequency signal can be greater than the duration of the pump pulse, and the corresponding component in the radiation spectrum can be interpreted as the appearance of subharmonic component below threshold.

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More information

Published date: 2002
Venue - Dates: 16th International Symposium of Nonlinear Acoustics, Moscow, Russia, 2002-08-18 - 2002-08-22

Identifiers

Local EPrints ID: 10288
URI: http://eprints.soton.ac.uk/id/eprint/10288
PURE UUID: 36f2a30e-4fe7-4965-bb50-fa2901a33009
ORCID for T.G. Leighton: ORCID iD orcid.org/0000-0002-1649-8750

Catalogue record

Date deposited: 04 Aug 2005
Last modified: 12 Dec 2021 02:47

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Contributors

Author: A. Maksimov
Author: E.V. Sosedko
Author: T.G. Leighton ORCID iD

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