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Cluster collapse in a cylindrical cell: correlating multibubble sonoluminescence, acoustic pressure, and erosion

Cluster collapse in a cylindrical cell: correlating multibubble sonoluminescence, acoustic pressure, and erosion
Cluster collapse in a cylindrical cell: correlating multibubble sonoluminescence, acoustic pressure, and erosion
A cylindrical ultrasonic reactor was driven at eight discrete frequencies in the range 20?150 kHz. Imaging of multibubble sonoluminescence (MBSL) within this cell showed discrete modes of activity throughout this frequency range. This modal activity was compared to the pressure distribution through the cell and also to the erosion/corrosion activity. The erosion/corrosion was detected using an electrochemical method employing a passivated aluminum electrode (250 ?m diameter). Each erosion/corrosion event was counted over a fixed time period (specifically 30 s) and used to map this phenomenon throughout a region of the cell. A strong spatial correlation was shown between the MBSL imaging, the acoustic pressure, and the erosion mapping at relatively low ultrasonic frequencies (here <50 kHz). However, at higher frequencies, although MBSL activity and relatively high acoustic amplitudes were detected, the rate of the erosion/corrosion activity of the system decreased. High-speed imaging (>100000 fps) of a bubble cloud near the electrode surface showed a region of bubble activity, the dynamics of which were correlated to the erosion/corrosion transients produced. These observations contribute to the growing body of knowledge which will allow the development of ultrasonic cleaning systems optimized for particular scenarios.
1932-7447
16416-16425
Vian, Christopher J.B.
c5ca4c67-5a34-475e-b99b-04593f9c6cc9
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Leighton, Timothy G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae
Vian, Christopher J.B.
c5ca4c67-5a34-475e-b99b-04593f9c6cc9
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Leighton, Timothy G.
3e5262ce-1d7d-42eb-b013-fcc5c286bbae

Vian, Christopher J.B., Birkin, Peter R. and Leighton, Timothy G. (2010) Cluster collapse in a cylindrical cell: correlating multibubble sonoluminescence, acoustic pressure, and erosion. The Journal of Physical Chemistry C, 114 (39), 16416-16425. (doi:10.1021/jp1027977).

Record type: Article

Abstract

A cylindrical ultrasonic reactor was driven at eight discrete frequencies in the range 20?150 kHz. Imaging of multibubble sonoluminescence (MBSL) within this cell showed discrete modes of activity throughout this frequency range. This modal activity was compared to the pressure distribution through the cell and also to the erosion/corrosion activity. The erosion/corrosion was detected using an electrochemical method employing a passivated aluminum electrode (250 ?m diameter). Each erosion/corrosion event was counted over a fixed time period (specifically 30 s) and used to map this phenomenon throughout a region of the cell. A strong spatial correlation was shown between the MBSL imaging, the acoustic pressure, and the erosion mapping at relatively low ultrasonic frequencies (here <50 kHz). However, at higher frequencies, although MBSL activity and relatively high acoustic amplitudes were detected, the rate of the erosion/corrosion activity of the system decreased. High-speed imaging (>100000 fps) of a bubble cloud near the electrode surface showed a region of bubble activity, the dynamics of which were correlated to the erosion/corrosion transients produced. These observations contribute to the growing body of knowledge which will allow the development of ultrasonic cleaning systems optimized for particular scenarios.

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More information

Published date: 9 September 2010
Organisations: Chemistry, Fluid Dynamics & Acoustics Group

Identifiers

Local EPrints ID: 166013
URI: http://eprints.soton.ac.uk/id/eprint/166013
ISSN: 1932-7447
PURE UUID: f044ff40-b1a2-4b7b-9d7f-a07570ed8d21
ORCID for Peter R. Birkin: ORCID iD orcid.org/0000-0002-6656-4074
ORCID for Timothy G. Leighton: ORCID iD orcid.org/0000-0002-1649-8750

Catalogue record

Date deposited: 21 Oct 2010 13:24
Last modified: 26 Nov 2019 02:03

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