Application of a low intensity axial magnetic field can promote significant convection during Bridgman growth of GeSi when resident thermoelectric currents at the growth interface are large due to difference of thermoelectric powers of the melt and of the ciystal and the tangential temperature gradient at the interface. Thermoelectromagnetic convection (TEMC) in the GeSi melt is characterized by a meridional flow driven by the rotation of the fluid due to the azimuthal Lorentz force from currents in the radial direction, concentrated near the interface, and the axial magnetic field. A similar flow is caused by a rotating magnetic field (RMF). When the field is rotating sufficiently fast, a time-averaged azimuthal Lorentz force (almost uniform axially) causes a steady rotation of the melt, and an associated meridional convection (Ekman cells) near the interface. In this work, we developed a computational model to study convection of the GeSi melt in a microgravity environment in the presence of low intensity magnetic fields.
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