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RESEARCH PAPERS

Natural Convective Heat Transfer Rates During the Solidification and Melting of Metals and Alloy Systems

[+] Author and Article Information
F. M. Chiesa, R. I. L. Guthrie

Department of Mining and Metallurgical Engineering, McGill University, Montreal, Quebec, Canada

J. Heat Transfer 96(3), 377-384 (Aug 01, 1974) (8 pages) doi:10.1115/1.3450209 History: Received June 08, 1973; Online August 11, 2010

Abstract

Analysis of experiments involving a cylindrical column of lead in the process of freezing downward or alternatively, of melting upward from the base of the container, showed that heat transfer rates associated with Bénard convection are less under transient conditions than at steady-state. Analysis of experiments involving the freezing of lead-tin alloys (0.2 – 1.6 wt. percent Sn) showed that the same heat transfer correlation for Bénard convection could be applied, provided the upper bounding “interface” was located on the solidus isotherm for planar and cellular alloy growth, and on the liquidus, for cellular-dendritic alloy growth.

Copyright © 1974 by ASME
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