Numerical simulation of convective three-dimensional flows in a horizontal cylinder under the action of a constant magnetic field
Identifieur interne : 000587 ( Main/Exploration ); précédent : 000586; suivant : 000588Numerical simulation of convective three-dimensional flows in a horizontal cylinder under the action of a constant magnetic field
Auteurs : H. Ben Hadid [France] ; D. Henry [France]Source :
- Journal of Crystal Growth [ 0022-0248 ] ; 1996.
Abstract
The effects of a constant magnetic field on electrically conducting liquid-metal flows in a cylindrical cavity corresponding to horizontal Bridgman growth are investigated numerically by solving the Navier-Stokes and Ohm equations for three-dimensional flows. The increase in the strength of the applied magnetic field leads to several fundamental changes in the properties of the thermal buoyant convection. The convective circulation progressively loses its intensity and is reorganized specifically depending on the direction (vertical, longitudinal or transversal) of the applied magnetic field. The characteristic behaviours observed correspond to the appearance of specific velocity profiles, of Hartmann layers and of parallel layers, and to the tendency towards two dimensionality. These structural changes are in fact closely connected to the repartition of the induced electric current inside the cavity.
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DOI: 10.1016/0022-0248(96)00044-9
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