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

Navarrete, M.; Cruz, S.; Castellanos, F.; Naude, J.L.; Méndez, F.

dc.contributor.author	Navarrete, M.
dc.contributor.author	Cruz, S.
dc.contributor.author	Castellanos, F.
dc.contributor.author	Naude, J.L.
dc.contributor.author	Méndez, F.
dc.date.accessioned	2015-04-23T09:38:10Z
dc.date.available	2015-04-23T09:38:10Z
dc.date.issued	2014
dc.description.abstract	Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.	en_ZA
dc.description.abstract	Single 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.librarian	cf2015	en_ZA
dc.format.medium	PDF	en_ZA
dc.identifier.citation	Navarrete, 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.isbn	97817759206873
dc.identifier.uri	http://hdl.handle.net/2263/44544
dc.publisher	International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics	en_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.subject	Single bubble sonoluminescence	en_ZA
dc.subject	Ultrasound agent contrast	en_ZA
dc.subject	Spherical resonator	en_ZA
dc.subject	Radial dynamics	en_ZA
dc.subject	Microbubbles	en_ZA
dc.subject	Waveforms	en_ZA
dc.subject	Fourier and time-frequency analysis	en_ZA
dc.title	Comparisons between dynamics of SBSL and an encapsulated bubble in spherical resonator	en_ZA
dc.type	Presentation	en_ZA