THREE-DIMENSIONAL CONSIDERATIONS OF UNIDIRECTIONAL SOLIDIFICATION IN A BINARY LIQUID
作者:
D. G. Neilson,
F. P. Incropera,
期刊:
Numerical Heat Transfer, Part A: Applications
(Taylor Available online 1993)
卷期:
Volume 23,
issue 1
页码: 1-20
ISSN:1040-7782
年代: 1993
DOI:10.1080/10407789308913659
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
Unidirectional solidification of an aqueous NH4Cl solution has been simulated using a fully three-dimensional model for the strongly coupled transport of momentum, energy, and species in the mushy and melt regions of the solution. The predictions reveal the nucleation and development of pencil-like vertical channels in the mushy region and the complex, three-dimensional flow and thermosolutal conditions associated with channel formation. The number of channels is at a maximum shortly after nucleation and thereafter decreases with increasing time, as solidification progresses. Favorable agreement is obtained between three- and two-dimensional predictions of global parameters such as heat rate and mass fraction of solid formation.
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