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Magnetohydrodynamic convection in molten gallium

Published online by Cambridge University Press:  10 January 1999

A. JUEL ,
T. MULLIN ,
H. BEN HADID  and
D. HENRY
A. JUEL
Affiliation:
Schuster Laboratory, The University of Manchester, Manchester M13 9PL, UK Present address: Center for Nonlinear Dynamics and Department of Physics, University of Texas at Austin, Austin, TX 78712, USA.
T. MULLIN
Affiliation:
Schuster Laboratory, The University of Manchester, Manchester M13 9PL, UK
H. BEN HADID
Affiliation:
Laboratoire de Mécanique des Fluides et d'Acoustique UMR 5509, Ecole Centrale de Lyon/Université Claude Bernard Lyon 1, BP 163, 69131 Ecully Cedex, France
D. HENRY
Affiliation:
Laboratoire de Mécanique des Fluides et d'Acoustique UMR 5509, Ecole Centrale de Lyon/Université Claude Bernard Lyon 1, BP 163, 69131 Ecully Cedex, France
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Abstract

We present the results of an experimental and numerical study of the effects of a steady magnetic field on sidewall convection in molten gallium. The magnetic field is applied in a direction which is orthogonal to the main flow which reduces the convection and good agreement is found for the scaling of this effect with the relevant parameters. Moreover, qualitatively similar changes in the structure of the bulk of the flow are observed in the experiment and the numerical simulations. In particular, the flow is restricted to two dimensions by the magnetic field, but it remains different to that found in two-dimensional free convection calculations. We also show that oscillations found at even greater temperature gradients can be suppressed by the magnetic field.

Type
Research Article
Information
Journal of Fluid Mechanics , Volume 378 , 10 January 1999 , pp. 97 - 118
Copyright
© 1999 Cambridge University Press

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