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Magnetohydrodynamic damping of convective flows in molten gallium

  • B. HOF (a1), A. JUEL (a2) and T. MULLIN (a1)

Abstract

We report the results of an experimental study of magnetohydrodynamic damping of sidewall convection in a rectangular enclosure filled with gallium. In particular we investigate the suppression of convection when a steady magnetic field is applied separately in each of the three principal directions of the flow. The strongest damping of the steady flow is found for a vertical magnetic field, which is in agreement with theory. However, we observe that the application of a field transverse to the flow provides greater damping than a longitudinal one, which seems to contradict available theory. We provide a possible resolution of this apparent dichotomy in terms of the length scale of the experiment.

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Magnetohydrodynamic damping of convective flows in molten gallium

  • B. HOF (a1), A. JUEL (a2) and T. MULLIN (a1)

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