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RESEARCH PAPERS

Void Formation in Radial Solidification of Cylinders

[+] Author and Article Information
C. D. Sulfredge, L. C. Chow, K. A. Tagavi

Department of Mechanical Engineering, University of Kentucky, Lexington, KY 40506-0046

J. Sol. Energy Eng 114(1), 32-39 (Feb 01, 1992) (8 pages) doi:10.1115/1.2929979 History: Received August 01, 1990; Revised July 01, 1991; Online June 06, 2008

Abstract

Experiments were carried out to observe the solidification sequence and void distribution for two different experimental liquids (cyclohexane and butanediol) enclosed in Pyrex tubes. Both liquids exhibited about ten percent volumetric shrinkage during the phase transition from liquid to solid. To evaluate the possibility of regulating void formation by soluble gases, tests were conducted both in the presence and absence of dissolved air. A physical model has been developed which predicts the essential features of the solidification pattern under earth’s gravity field of 1-g for cylindrical geometries and allows extrapolation of the results to outer space conditions of 0-g. Finally, an attempt was made to determine analytically the final void shape which would result from each nucleated bubble in 0-g. Understanding these aspects of the solidification process is vital to development of better thermal energy storage systems for space power applications.

Copyright © 1992 by The American Society of Mechanical Engineers
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