Abstract
The role of natural and damped convection during the thermally controlled solidification of tin and aluminium alloys in a toroidal mould was studied. The damped convection was caused by a stationary and uniform magnetic field parallel to the gravity field. Temperature measurements made it possible to follow both the evolution of the solidification front and that of the temperature distribution inside the bulk liquid with time. These experiments were performed from various degrees of superheat, in the absence and presence of a magnetic field. A discussion is presented relating the crystallographical findings to the temperature field patterns.
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