Comparisons between dynamics of SBSL and an encapsulated bubble in spherical resonator

dc.contributor.authorNavarrete, M.
dc.contributor.authorCruz, S.
dc.contributor.authorCastellanos, F.
dc.contributor.authorNaude, J.L.
dc.contributor.authorMéndez, F.
dc.date.accessioned2015-04-23T09:38:10Z
dc.date.available2015-04-23T09:38:10Z
dc.date.issued2014
dc.description.abstractPaper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.en_ZA
dc.description.abstractSingle bubble sonoluminescence (SBSL) and ultrasound agent contrast (UAC), each one levitating in a standing wave field (30~70 kHz) inside of a spherical resonator filled with sterile water, are compared in order to understand their radial dynamics. Light scattering technique is employed to measure the radial pulsations of individual/cloud microbubbles. Waves emitted by bubble (shock wave) and the intensity of the acoustic field applied are measured through a needle hydrophone. UAC is highly diluted Polyson® microbubbles. Waveforms are processed by means of Fourier and time-frequency analysis. The experimental data and the main parameters involved (T, , Pa, Re and De) are analyzed as a function of short and long regimen. Linear and nonlinear oscillations were observed and associated with time-frequency spectra. Parametric instabilities are inferred from the light-scattered signal. The resting diameter and temperature are shown as principal parameters in the prediction of microbubble behavior.en_ZA
dc.description.librariancf2015en_ZA
dc.format.mediumPDFen_ZA
dc.identifier.citationNavarrete, M, Cruz, S, Castellanos, F, Naude, JL, Méndez, F 2014, 'Comparisons between dynamics of SBSL and an encapsulated bubble in spherical resonator', Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.en_ZA
dc.identifier.isbn97817759206873
dc.identifier.urihttp://hdl.handle.net/2263/44544
dc.publisherInternational Conference on Heat Transfer, Fluid Mechanics and Thermodynamicsen_ZA
dc.rights© 2014 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria.en_ZA
dc.subjectSingle bubble sonoluminescenceen_ZA
dc.subjectUltrasound agent contrasten_ZA
dc.subjectSpherical resonatoren_ZA
dc.subjectRadial dynamicsen_ZA
dc.subjectMicrobubblesen_ZA
dc.subjectWaveformsen_ZA
dc.subjectFourier and time-frequency analysisen_ZA
dc.titleComparisons between dynamics of SBSL and an encapsulated bubble in spherical resonatoren_ZA
dc.typePresentationen_ZA

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