Viscous Friction of a Ferrofluid in the Coaxial Gap between Cylindrical Walls Being in Uniform Rectilinear Relative Motion

The viscous friction of a ferrofluid in the coaxial gap between a stationary outer nonmagnetic tube and a uniformly and rectilinearly moving inner cylindrical permanent magnet was investigated experimentally and theoretically. An analytical expression for the effective coefficient of friction was pr...

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Bibliographic Details
Published in:Bulletin of the Russian Academy of Sciences. Physics 2024-07, Vol.88 (7), p.1158-1165
Main Authors: Ivanov, A. S., Koskov, M. A., Somov, S. A.
Format: Article
Language:English
Subjects:
Coefficient of friction
Ferrofluids
Flow profiles
Hadrons
Heavy Ions
Laminar flow
Nuclear Physics
Permanent magnets
Physics
Physics and Astronomy
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Summary:The viscous friction of a ferrofluid in the coaxial gap between a stationary outer nonmagnetic tube and a uniformly and rectilinearly moving inner cylindrical permanent magnet was investigated experimentally and theoretically. An analytical expression for the effective coefficient of friction was proposed within the framework of the model concepts of the Couette–Poiseuille flow profile with zero flow rate and was confirmed in a laboratory experiment.
ISSN:1062-8738
1934-9432
DOI:10.1134/S1062873824707256