Abstract
The role of natural and forced convection during solidification of aluminium alloys in a toroidal mould was studied. The forced convection was generated by application of a time-varying electromagnetic field. Maps of electromagnetic body forces and velocity fields were obtained for various positions of the solidification front. Temperature measurements made it possible to follow the evolution of the temperature distribution inside the solidifying melt with time. These experiments were performed in the absence and presence of electromagnetic stirring. A discussion is presented relating the crystallographical findings to the heat and fluid flow patterns.
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