Flow Transitions in a Rotating Magnetic Field
Critical Rayleigh numbers have been measured in a liquid metal cylinder of finite height in the presence of a rotating magnetic field. Several different stability regimes were observed, which were determined by the values of the Rayleigh and Hartmann numbers. For weak rotating magnetic fields and sm...
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Published in | Experiments in fluids Vol. 20; no. 6; pp. 454 - 459 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Marshall Space Flight Center
Springer-Verlag
01.04.1996
Springer |
Subjects | |
Online Access | Get full text |
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Summary: | Critical Rayleigh numbers have been measured in a liquid metal cylinder of finite height in the presence of a rotating magnetic field. Several different stability regimes were observed, which were determined by the values of the Rayleigh and Hartmann numbers. For weak rotating magnetic fields and small Rayleigh numbers, the experimental observations can be explained by the existence of a single non-axisymmetric meridional roll rotating around the cylinder, driven by the azimuthal component of the magnetic field. The measured dependence of rotational velocity on magnetic field strength is consistent with the existence of laminar flow in this regime. |
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Bibliography: | NASA-TM-112482 NAS 1.15:112482 Marshall Space Flight Center MSFC ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0723-4864 1432-1114 |
DOI: | 10.1007/BF00189385 |