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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Bibliographic Details
Published inExperiments in fluids Vol. 20; no. 6; pp. 454 - 459
Main Authors Volz, M. P., Mazuruk, K.
Format Journal Article
LanguageEnglish
Published Marshall Space Flight Center Springer-Verlag 01.04.1996
Springer
Subjects
Exact sciences and technology
Fluid dynamics
Fundamental areas of phenomenology (including applications)
Magnetohydrodynamics and electrohydrodynamics
Physics
Physics (General)
Rotating system
MHD flow
Test facilities
Stability
Liquid metals
Magnetic fields
Experimental study
Rayleigh number
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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.
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