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A study of the effects of macrosegregation and buoyancy-driven flow in binary mixture solidificationA generalized anisotropic porous medium approach is developed for modelling the flow, heat and mass transport processes during binary mixture solidification. Transient predictions are obtained using FEM, coupled with an implicit time-marching scheme, for solidification inside a two-dimensional rectangular enclosure. A parametric study focusing attention on the effects of solutal buoyancy and thermal buoyancy is presented. It is observed that three parameters, namely the thermal Rayleigh number, the solutal Rayleigh number, and the relative density change parameter, significantly alter the flow fields in the liquid and the mushy regions. Depending upon the nature of these flow fields, the solute enrichment caused by macrosegregation may occur in the top or the bottom region of the enclosure.
Document ID
19930060226
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Sinha, S. K.
(Delhi Inst. of Technology India)
Sundararajan, T.
(Indian Inst. of Technology Kanpur, India)
Garg, V. K.
(NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
August 16, 2013
Publication Date
June 1, 1993
Publication Information
Publication: International Journal of Heat and Mass Transfer
Volume: 36
Issue: 9
ISSN: 0017-9310
Subject Category
Fluid Mechanics And Heat Transfer
Accession Number
93A44223
Distribution Limits
Public
Copyright
Other

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