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Experiments on the stability of hydromagnetic Couette flow

Published online by Cambridge University Press:  28 March 2006

R. J. Donnelly  and
D. R. Caldwell
R. J. Donnelly
Affiliation:
Institute for the Study of Metals and Department of Physics, The University of Chicago, Chicago, Illinois
D. R. Caldwell
Affiliation:
Institute for the Study of Metals and Department of Physics, The University of Chicago, Chicago, Illinois
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Abstract

The viscometer investigations of Donnelly & Ozima (1962) on the stability of flow between rotating cylinders in the presence of a magnetic field have been extended by making careful torque measurements in the subcritical range using improved mercury. The results show that a small difference in stability can be observed with conducting cylinders as compared with insulating cylinders. The results also suggest that a heretofore unnoticed instability begins well before the instability studied earlier. This relatively weak instability accounts for some of the anomalous effective viscosity observed by Donnelly & Ozima.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 19 , Issue 2 , June 1964 , pp. 257 - 263
Copyright
© 1964 Cambridge University Press

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References

Caldwell, D. R. 1963 Oscillating boundary layer in magnetohydrodynamics. I. Nonconducting boundary. II. Conducting boundary. Phys. Fluids (in Press).
Chandrasekhar, S. 1961 Hydrodynamic and Hydromagnetic Stability. Oxford: Clarendon Press.
Di Prima, R. C. 1961 Phys. Fluids, 4, 751.
Donnelly, R. J. & Ozima, M. 1962 Proc. Roy. Soc. A, 266, 272.