CONVECTIONAL MODE AND ELECTRICAL FIELD IN SILICON MELTS UNDER VERTICAL, HORIZONTAL, AND ROTATING MAGNETIC FIELDS

Numerical computations were carried out to study a convectional mode and an electrical field in silicon melts in a cylindrical container that is sufficiently long in an axial direction under various magnetic fields. Under both no and vertical magnetic fields, the fluid represented a rigid rotation. Under a horizontal magnetic field, flow in the circumferential direction was suppressed strongly. Under a rotating magnetic field, fluid rotated with the rotational rate of a magnetic field when the rotational rate of a magnetic field and that of a container were different. These flow patterns could be successfully explained by considering an electric field.