Magnetohydrodynamic damping of convective flows in molten gallium Journal Article

Author(s): Hof, Björn; Juel, Anne; Mullin, Tom P
Article Title: Magnetohydrodynamic damping of convective flows in molten gallium
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.
Keywords: Damping; Gallium; Magnetic field effects; Magnetohydrodynamics
Journal Title: Journal of Fluid Mechanics
Volume: 482
ISSN: 1469-7645
Publisher: Cambridge University Press  
Date Published: 2003-05-13
Start Page: 163
End Page: 179
DOI: 10.1017/S0022112003004014
Open access: no