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  Magnetic levitation stabilized by streaming fluid flows

Baldwin, K. A., de Fouchier, J. B., Atkinson, P. S., Hill, R. J. A., Swift, M. R., & Fairhurst, D. J. (2018). Magnetic levitation stabilized by streaming fluid flows. Physical Review Letters, 121(6): 064502. doi:10.1103/PhysRevLett.121.064502.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0001-E764-A Version Permalink: http://hdl.handle.net/21.11116/0000-0003-6C32-C
Genre: Journal Article

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 Creators:
Baldwin, Kyle A.1, Author              
de Fouchier, J. B., Author
Atkinson, P. S., Author
Hill, R. J. A., Author
Swift, M. R., Author
Fairhurst, D. J., Author
Affiliations:
1Group Active soft matter, Department of Dynamics of Complex Fluids, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society, ou_2063307              

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Free keywords: Boundary layer receptivity, stability & separation, Ferromagnetism, Flow boundary effects, Flow instability, Fluid flows, Forced convection, Rheology techniques, Swimming, Turbulent mixing, Rheology, Vortex flows
 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 stabilized the flea. Our findings have implications for the locomotion of artificial swimmers and the development of bidirectional microfluidic pumps, and they provide an alternative to sophisticated commercial levitators.

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Language(s): eng - English
 Dates: 2018-08-082018-08-10
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1103/PhysRevLett.121.064502
 Degree: -

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Title: Physical Review Letters
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Woodbury, N.Y. : American Physical Society
Pages: 5 Volume / Issue: 121 (6) Sequence Number: 064502 Start / End Page: - Identifier: ISSN: 0031-9007
CoNE: /journals/resource/954925433406_1