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Cavitation clusters in lipid systems: The generation of a bifurcated streamer and the dual collapse of a bubble cluster

Cavitation clusters in lipid systems: The generation of a bifurcated streamer and the dual collapse of a bubble cluster
Cavitation clusters in lipid systems: The generation of a bifurcated streamer and the dual collapse of a bubble cluster
Several studies have reported the use of high‐intensity ultrasound (HIU) to induce the crystallization of lipids. The effect that HIU has on lipid crystallization is usually attributed to the generation of cavities but acoustic cavitation has never been fully explored in lipids. The dynamics of a particular cavitation cluster next to a piston like emitter (PLE) in an oil was investigated in this study. The lipid systems, which are important in food processing, are studied with high‐speed camera imaging, laser scattering, and acoustic pressure measurements. A sequence of stable clusters was noted. In addition, a bifurcated streamer was detected, which exists within a sequence of clusters. This is shown to originate from two clusters on the PLE tip oscillating with a 180° phase shift in time with respect to one another. Finally, the collapse phase of the cluster is shown to involve a rapid (~10 μs) two‐stage process. These results show that the dynamics of cluster formation and collapse is driven by HIU power levels and might have implications in lipid sonocrystallization.
Lipids, Cavitation, Crystallization, Bubbles, Clusters, Dynamics
0003-021X
1197-1204
Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Martin, Hannah
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Youngs, Jack
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Truscott, Tadd
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Merritt, Andrew
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Elison, Ethan J.
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Martini, Silvana
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Birkin, Peter R.
ba466560-f27c-418d-89fc-67ea4f81d0a7
Martin, Hannah
0ad9ec1c-5e2e-419d-8602-6b3eaccaa65a
Youngs, Jack
bdc2f78f-ae97-4faf-8930-1970ca697867
Truscott, Tadd
a7f0e66d-3c20-40ca-b795-bc9beec07132
Merritt, Andrew
a3b24d3d-736f-4062-8a24-b7824fcb19c2
Elison, Ethan J.
aea9f43d-c1ea-4b4a-9588-41c5b45c931b
Martini, Silvana
629c2b15-42c1-4d03-b669-45a1fd67e72f

Birkin, Peter R., Martin, Hannah, Youngs, Jack, Truscott, Tadd, Merritt, Andrew, Elison, Ethan J. and Martini, Silvana (2019) Cavitation clusters in lipid systems: The generation of a bifurcated streamer and the dual collapse of a bubble cluster. Journal of the American Oil Chemists' Society, 96 (11), 1197-1204. (doi:10.1002/aocs.12283).

Record type: Article

Abstract

Several studies have reported the use of high‐intensity ultrasound (HIU) to induce the crystallization of lipids. The effect that HIU has on lipid crystallization is usually attributed to the generation of cavities but acoustic cavitation has never been fully explored in lipids. The dynamics of a particular cavitation cluster next to a piston like emitter (PLE) in an oil was investigated in this study. The lipid systems, which are important in food processing, are studied with high‐speed camera imaging, laser scattering, and acoustic pressure measurements. A sequence of stable clusters was noted. In addition, a bifurcated streamer was detected, which exists within a sequence of clusters. This is shown to originate from two clusters on the PLE tip oscillating with a 180° phase shift in time with respect to one another. Finally, the collapse phase of the cluster is shown to involve a rapid (~10 μs) two‐stage process. These results show that the dynamics of cluster formation and collapse is driven by HIU power levels and might have implications in lipid sonocrystallization.

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Accepted/In Press date: 10 August 2019
e-pub ahead of print date: 1 October 2019
Published date: November 2019
Keywords: Lipids, Cavitation, Crystallization, Bubbles, Clusters, Dynamics

Identifiers

Local EPrints ID: 435679
URI: http://eprints.soton.ac.uk/id/eprint/435679
ISSN: 0003-021X
PURE UUID: fb04a3a4-ac6c-479a-83f6-311ca6ae2f9d
ORCID for Peter R. Birkin: ORCID iD orcid.org/0000-0002-6656-4074

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Date deposited: 18 Nov 2019 17:30
Last modified: 07 Oct 2020 04:16

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Contributors

Author: Peter R. Birkin ORCID iD
Author: Hannah Martin
Author: Jack Youngs
Author: Tadd Truscott
Author: Andrew Merritt
Author: Ethan J. Elison
Author: Silvana Martini

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