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ISSN Online: 2377-424X

ISBN Print: 0-89116-559-2

International Heat Transfer Conference 8
August, 17-22, 1986, San Francisco, USA

EFFECTS OF NATURAL, FORCED AND DAMPED CONVECTIONS DURING THE SOLIDIFICATION OF A PURE METAL

Get access (open in a dialog) DOI: 10.1615/IHTC8.940
pages 1761-1766

Sinopsis

The role of natural, forced and damped convections during solidification of pure tin in an annular crucible was studied. The forced convection was provoked by the rotation of the exterior cylinder, while the damped convection was caused by an externally imposed stationary magnetic field parallel to the gravity field. Temperature measurements made it possible to follow both the evolution of the solidification front and temperature measurements inside the bulk liquid with time. Maps of velocity fields were obtained in forced convection for various angular velocity of the outer cylinder and various positions of the solidification front. These experiments were carried out from various degrees of superheat. A discussion is presented relating the metallurgical findings (macrostructure) to the heat and fluid flow measurements.