An experimental investigation of the solidification process in a V-shaped sump

An experimental study of binary mixture solidification in a V-shaped sump is conducted. NH 4Cl-H 2O is used as the phase change material. The variations of temperature, concentration, as well as the location of the interface front, are measured and reported in this investigation. The results indicat...

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Bibliographic Details
Published in:International journal of heat and mass transfer 1995, Vol.38 (13), p.2383-2393
Main Authors: Burton, R., Yang, G., Dong, Z.F., Ebadian, M.A.
Format: Article
Language:English
Subjects:
Binary mixtures
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Growth from solutions
Interfaces (materials)
Materials science
Methods of crystal growth
physics of crystal growth
Physics
Solutions
Temperature distribution
Temperature measurement
Test facilities
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Summary:An experimental study of binary mixture solidification in a V-shaped sump is conducted. NH 4Cl-H 2O is used as the phase change material. The variations of temperature, concentration, as well as the location of the interface front, are measured and reported in this investigation. The results indicate that the solidification process exhibits totally different behavior when the initial component of the solution is varied. For a hypoeutectic solution, the columnar solidification in the dendritic interface is the dominant mechanism. For the hypereutectic solution, both columnar and equiaxed solidification are important. The solidification starts as the equiaxed dendrites grow and coalesce in the entire solution. They then descend and settle at the bottom of the sump to form a loose, mushy zone. The solid region grows underneath the mushy zone.
ISSN:0017-9310
1879-2189
DOI:10.1016/0017-9310(94)00362-Y