Bubble collapse near porous plates

Elijah D. Andrews, David Fernández Rivas, Ivo R. Peters

Research output: Working paperPreprintAcademic

69 Downloads (Pure)

Abstract

A gas or vapour bubble near a solid boundary collapses towards 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 solid 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.
Original languageEnglish
PublisherArXiv.org
DOIs
Publication statusPublished - 7 Oct 2022

Keywords

  • physics.flu-dyn

Fingerprint

Dive into the research topics of 'Bubble collapse near porous plates'. Together they form a unique fingerprint.

Cite this