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פותח על ידי קלירמאש פתרונות בע"מ -
Experimental study on the crystallization of a binary melt at the vertical boundary of an enclosure
Year:
1995
Authors :
טנאי, יוסף
;
.
Volume :
38
Co-Authors:
Tanny, J., Center for Technological Education Holon, P.O.B. 305, Holon, 58102, Israel
Facilitators :
From page:
1141
To page:
1150
(
Total pages:
10
)
Abstract:
Crystallization of a uniform binary liquid at the cooled vertical boundary of an enclosure can generate compositional stratification in the melt. During its evolution the induced stratified region is separated from the uniform melt by a sharp density interface which migrates with time. This phenomenon is studied experimentally in an axisymmetric geometry, by cooling and crystallizing a uniform aqueous solution of sodium carbonate (Na2CO3) by means of a vertical circular pipe through which coolant is circulated. The investigation is focused on the effect of the applied undercooling on the structure of the crystal and on the growth rates of the stratified layer depth and the typical crystal diameter. It is shown that, at low undercooling, the dendrites at the mush-liquid interface are packed, the stratified layer depth grows as t1.1 and the typical crystal diameter grows like t0.45 (where t is the time from initiation of cooling). At larger undercooling, the dendrites are spiky and the stratified layer depth and the typical crystal diameter grow like t1.5 and t0.7, respectively. © 1995.
Note:
Related Files :
Compositional stratification
Coolants
COOLING
Crystal diameter
Crystal growth
Interfaces (materials)
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/0017-9310(94)00247-S
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
25873
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:18
Scientific Publication
Experimental study on the crystallization of a binary melt at the vertical boundary of an enclosure
38
Tanny, J., Center for Technological Education Holon, P.O.B. 305, Holon, 58102, Israel
Experimental study on the crystallization of a binary melt at the vertical boundary of an enclosure
Crystallization of a uniform binary liquid at the cooled vertical boundary of an enclosure can generate compositional stratification in the melt. During its evolution the induced stratified region is separated from the uniform melt by a sharp density interface which migrates with time. This phenomenon is studied experimentally in an axisymmetric geometry, by cooling and crystallizing a uniform aqueous solution of sodium carbonate (Na2CO3) by means of a vertical circular pipe through which coolant is circulated. The investigation is focused on the effect of the applied undercooling on the structure of the crystal and on the growth rates of the stratified layer depth and the typical crystal diameter. It is shown that, at low undercooling, the dendrites at the mush-liquid interface are packed, the stratified layer depth grows as t1.1 and the typical crystal diameter grows like t0.45 (where t is the time from initiation of cooling). At larger undercooling, the dendrites are spiky and the stratified layer depth and the typical crystal diameter grow like t1.5 and t0.7, respectively. © 1995.
Scientific Publication
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