Yu, YE, Khodaparast, S and Stone, HA (2018) Separation of particles by size from a suspension using the motion of a confined bubble. Applied Physics Letters, 112 (18). 181604. ISSN 0003-6951
Abstract
When confined in a liquid-filled circular cylinder, a long air bubble moves slightly faster than the bulk liquid as a small fraction of the liquid leaks through a very thin annular gap between the bubble and the internal wall of the cylinder. At low velocities, the thickness of this lubricating film formed around the bubble is set only by the liquid properties and the translational speed of the bubble and thus can be tuned in a simple fashion. Here, we use this setting to filter, based on size, micron-size particles that are originally dispersed in a suspension. Furthermore, we apply this process for separation of particles from a polydisperse solution. The bubble interface is free of particles initially, and particles of different sizes can enter the liquid film region. Particle separation occurs when the thickness of the lubricating liquid film falls between the diameters of the two different particles. While large particles will be collected at the bubble surface, smaller particles can leak through the thin film and reach the fluid region behind the bubble. As a result, the film thickness can be fine-tuned by simply adjusting the speed of a translating confined bubble, so as to achieve separation of particles by size based on the relative particle diameter compared to the film thickness.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2018 Author(s). This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. The following article appeared in Yu, Y., Khodaparast, S. and Stone, H. 2018. Separation of particles by size from a suspension using the motion of a confined bubble. Applied Physics Letters. 112(18),p.181604 and may be found at Available from: https://aip.scitation.org/doi/suppl/10.1063/1.5023341. Uploaded in accordance with the publisher's self-archiving policy. |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Mechanical Engineering (Leeds) > Institute of Engineering Thermofluids, Surfaces & Interfaces (iETSI) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 03 Jul 2020 07:46 |
Last Modified: | 25 Jun 2023 22:19 |
Status: | Published |
Publisher: | AIP Publishing |
Identification Number: | 10.1063/1.5023341 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:162576 |