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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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