
Accession Number : AD0617330
Title : THE SOLUTION OF A CLASS OF TWODIMENSIONAL MELTING AND SOLIDIFICATION PROBLEMS.
Descriptive Note : Technical rept.,
Corporate Author : COLUMBIA UNIV NEW YORK INST OF FLIGHT STRUCTURES
Personal Author(s) : Sikarskie,David L. ; Boley,Bruno A.
Report Date : MAY 1964
Pagination or Media Count : 73
Abstract : Twodimensional melting and solidification problems are divided into three convenient classes and a general method of solution for one of these is presented. The concept is used of a fictitious body of constant geometry, in which is embedded the real body (whose dimensions are changing due to the change in phase); the fictitious body is acted upon by a fictitious heat flux or (in some problems) a fictitious initial temperature distribution. A set of integrodifferential equations is presented to be solved simultaneously, numerically or in series form. The melting of a finite, insulated slab with the melt immediately removed is formulated and an example for a semiinfinite, insulated strip is given. The solidification of a finite insulated slab with zero superheat is formulated and an example for a specific cooling history is given. Twodimensional effects are introduced by spatial variations of heating or cooling conditions, and shorttime series solutions are developed. (Author)
Descriptors : (*MELTING, ABLATION), (*CRYSTALLIZATION, COOLING), PHASE STUDIES, HEAT TRANSFER, THERMAL CONDUCTIVITY, DIFFERENTIAL EQUATIONS, INTEGRAL EQUATIONS
Distribution Statement : APPROVED FOR PUBLIC RELEASE