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Bubble collapse near porous plates

Bubble collapse near porous plates
Bubble collapse near porous plates
The collapse of a gas or vapour bubble near a non-porous boundary is directed at the boundary due to the asymmetry induced by the nearby boundary. High surface pressure and shear stress from this collapse can damage, or clean, the surface. A porous boundary, such as a filter, would act similarly to a non-porous boundary but with reduced asymmetry and thus reduced effect. Prior research has measured the cleaning effect of bubbles on filters using ultrasonic cleaning, but it is not known how the bubble dynamics are fundamentally affected by the porosity of the surface. We address this question experimentally by investigating how the standoff distance, porosity, pore size and pore shape affect two collapse properties: bubble displacement and bubble rebound size. We show that these properties depend primarily on the standoff distance and porosity of the boundary and extend a previously developed numerical model that approximates this behaviour. Using the numerical model in combination with experimental data, we show that bubble displacement and bubble rebound size each collapse onto respective single curves.
bubble dynamics, cavitation
0022-1120
Andrews, Elijah
81c1497b-1d44-4359-b026-f2ef2259b8c3
Fernandez Rivas, David
9fce6d79-2b22-4c83-b04e-beeebf36e42a
Peters, Ivo R
222d846e-e620-4017-84cb-099b14ff2d75
Andrews, Elijah
81c1497b-1d44-4359-b026-f2ef2259b8c3
Fernandez Rivas, David
9fce6d79-2b22-4c83-b04e-beeebf36e42a
Peters, Ivo R
222d846e-e620-4017-84cb-099b14ff2d75

Andrews, Elijah, Fernandez Rivas, David and Peters, Ivo R (2023) Bubble collapse near porous plates. Journal of Fluid Mechanics, 962, [A11]. (doi:10.1017/jfm.2023.266).

Record type: Article

Abstract

The collapse of a gas or vapour bubble near a non-porous boundary is directed at the boundary due to the asymmetry induced by the nearby boundary. High surface pressure and shear stress from this collapse can damage, or clean, the surface. A porous boundary, such as a filter, would act similarly to a non-porous boundary but with reduced asymmetry and thus reduced effect. Prior research has measured the cleaning effect of bubbles on filters using ultrasonic cleaning, but it is not known how the bubble dynamics are fundamentally affected by the porosity of the surface. We address this question experimentally by investigating how the standoff distance, porosity, pore size and pore shape affect two collapse properties: bubble displacement and bubble rebound size. We show that these properties depend primarily on the standoff distance and porosity of the boundary and extend a previously developed numerical model that approximates this behaviour. Using the numerical model in combination with experimental data, we show that bubble displacement and bubble rebound size each collapse onto respective single curves.

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Andrews, Rivas, Peters - 2023 - Bubble collapse near porous plates - Version of Record
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Accepted/In Press date: 27 March 2023
Published date: 10 May 2023
Additional Information: Funding Information: We acknowledge financial support from the EPSRC under grant no. EP/P012981/1. D.F.R. acknowledges the funding from the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme (grant agreement number 851630). Data and code supporting this study are openly available from the University of Southampton repository at https://doi.org/10.5258/SOTON/D2582 . Publisher Copyright: © The Author(s), 2023. Published by Cambridge University Press.
Keywords: bubble dynamics, cavitation

Identifiers

Local EPrints ID: 476687
URI: http://eprints.soton.ac.uk/id/eprint/476687
ISSN: 0022-1120
PURE UUID: f4492bf0-d7cb-4f82-b736-2ea08142645e
ORCID for Elijah Andrews: ORCID iD orcid.org/0000-0002-4634-199X
ORCID for Ivo R Peters: ORCID iD orcid.org/0000-0002-3549-3322

Catalogue record

Date deposited: 11 May 2023 16:41
Last modified: 17 Mar 2024 03:39

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Contributors

Author: Elijah Andrews ORCID iD
Author: David Fernandez Rivas
Author: Ivo R Peters ORCID iD

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