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Magnetic Levitation Stabilized by Streaming Fluid Flows

Fairhurst, D. J.; Swift, M. R.; Hill, R. J. A.; Atkinson, P. S.; Baldwin, K. A.; Baldwin, K.A.; de Fouchier, J.-B.; Atkinson, P.S.; Hill, R.J.A.; Swift, M.R.; Fairhurst, D.J.

Authors

D. J. Fairhurst

M. R. Swift

R. J. A. Hill

P. S. Atkinson

K. A. Baldwin

K.A. Baldwin

J.-B. de Fouchier

P.S. Atkinson

R.J.A. Hill

M.R. Swift

D.J. Fairhurst



Abstract

We demonstrate that the ubiquitous laboratory magnetic stirrer provides a simple passive method of magnetic levitation, in which the so-called ‘flea’ levitates indefinitely. We study the onset of levitation and quantify the flea’s motion (a combination of vertical oscillation, spinning and “waggling”), finding excellent agreement with a mechanical analytical model. The waggling motion drives recirculating flow, producing a centripetal reaction force that stabilises the flea. Our findings have implications for the locomotion of artificial swimmers, for the development of bidirectional microfluidic pumps and provide an alternative to sophisticated commercial levitators.

Journal Article Type Article
Publication Date Aug 8, 2018
Journal Physical Review Letters
Print ISSN 0031-9007
Electronic ISSN 1079-7114
Publisher American Physical Society
Peer Reviewed Peer Reviewed
Volume 121
Issue 6
Article Number 064502
Pages 1-5
APA6 Citation Fairhurst, D., Swift, M., Hill, R., Atkinson, P., Baldwin, K., Baldwin, K., …Fairhurst, D. (2018). Magnetic Levitation Stabilized by Streaming Fluid Flows. Physical Review Letters, 121(6), 1-5. doi:10.1103/physrevlett.121.064502
DOI https://doi.org/10.1103/physrevlett.121.064502
Publisher URL https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.121.064502
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingh.../end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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