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Recent results on MHD damped convection in the horizontal Brigmanconfiguration

L. Davoust1 - F. Bertrand2 - R. Moreau1 - Ph. Tanguy2 - R. Bolcato1

1 INPG Laboratoire EPM-MADYLAM, ENSHMG, BP 95 38402 Saint Martin d Heres Cedex, France
2 UREPI, Ecole Polytechnique, P.O. Box 6079, Station Centre-Ville Montreal, Canada, H3C 3A7

A 3D numerical simulation of the steady convective flow of a low Prandtl number fluid (Pr = 0.025) in the melt of a horizontal Bridgman crystal growth furnace in the presence of a vertical uniform magnetic field is presented. Former theoretical, experimental and 2D numerical results for the primary flow are confirmed. Moreover, a rather complex3D flow structure, driven by both the temperature and the electric potential distributions is exhibited. New experimental results on the stability of this flow are also presented, which suggest a subcritical bifurcation with hysteresis and different spectral behaviours when the magnetic field is increasing (stabilizing) or decreasing (destabilizing). Table 1, Figs 9, Refs 14.

Magnitnaya Gidrodinamika 33, No. 4, 387-394, 1997 [PDF, 0.50 Mb]
Magnetohydrodynamics 33, No. 4, 319-327, 1997 [PDF, 0.44 Mb]

Copyright: Institute of Physics, University of Latvia
Electronic edition ISSN 1574-0579
Printed edition ISSN 0024-998X