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Numerical model for dendritic solidification of binary alloysA finite element model capable of simulating solidification of binary alloys and the formation of freckles is presented. It uses a single system of equations to deal with the all-liquid region, the dendritic region, and the all-solid region. The dendritic region is treated as an anisotropic porous medium. The algorithm uses the bilinear isoparametric element, with a penalty function approximation and a Petrov-Galerkin formulation. Numerical simulations are shown in which an NH4Cl-H2O mixture and a Pb-Sn alloy melt are cooled. The solidification process is followed in time. Instabilities in the process can be clearly observed and the final compositions obtained.
Document ID
19930062732
Document Type
Reprint (Version printed in journal)
Authors
Felicelli, S. D. (NASA Lewis Research Center Cleveland, OH, United States)
Heinrich, J. C. (NASA Lewis Research Center Cleveland, OH, United States)
Poirier, D. R. (Arizona Univ. Tucson, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Publication Information
Publication: Numerical Heat Transfer, Part B: Fundamentals
Volume: 23
Issue: 4
ISSN: 1040-7790
Subject Category
SOLID-STATE PHYSICS
Funding Number(s)
CONTRACT_GRANT: NAG3-1060
Distribution Limits
Public
Copyright
Other