Dynamic behaviour of laser nucleated bubbles in a focused ultrasound field

Wang, Lian, Memoli, Gianluca, Hodnett, Mark and Zeqiri, Bajram (2015) Dynamic behaviour of laser nucleated bubbles in a focused ultrasound field. 2015 IEEE International Ultrasonics Symposium, Taipei, Taiwan, 21-24 October 2015. Published in: 2015 IEEE International Ultrasonics Symposium (IUS). 1-4. Institute of Electrical and Electronics Engineers

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Abstract

A reference facility to control the cavitation of single bubbles and bubble clouds, using optical and acoustic fields, has been designed and developed at the National Physical Laboratory, UK. The facility consists of a cuboid acoustic chamber, with optical windows on four sides and four transducers mounted on a truncated tetrahedron cap, a Q-switched laser, and an optical beam splitting system able to form either single or multiple beams. This work presents a characterization of this facility: the acoustic pressure field inside the acoustic chamber was measured with a combination of laser refractometry and hydrophone scans, to determine the locations where cavitation can be studied, while the optical threshold was quantified by observing nucleation as a function of the beam parameters. This work also presents some preliminary acoustic emission data and high-speed observations of bubble dynamics.

Item Type: Conference Proceedings
Additional Information: Unmapped bibliographic data: VO - [Field not mapped to EPrints] JA - 2015 IEEE International Ultrasonics Symposium (IUS) [Field not mapped to EPrints] JO - 2015 IEEE International Ultrasonics Symposium (IUS) [Field not mapped to EPrints]
Keywords: acoustic emission, acoustic transducers, bubbles, cavitation, hydrophones, measurement by laser beam, nonlinear acoustics, nucleation, optical beam splitters, refractive index measurement, Q-switched laser, acoustic chamber, acoustic pressure field, bubble clouds, cavitation, cuboid acoustic chamber, dynamic behaviour, focused ultrasound field, hydrophone scans, laser nucleated bubbles, laser refractometry, optical beam splitting system, optical windows, reference facility, single bubbles, transducers, truncated tetrahedron cap, Acoustic beams, Acoustic measurements, Acoustics, High-speed optical techniques, Laser beams, Optical beams, Stimulated emission, bubble dynamics, cavitation, laser nucleation, reference facility
Schools and Departments: School of Engineering and Informatics > Informatics
Research Centres and Groups: Creative Technology
Depositing User: Gianluca Memoli
Date Deposited: 02 Jan 2018 11:50
Last Modified: 02 Jan 2018 11:50
URI: http://sro.sussex.ac.uk/id/eprint/72505
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