Rapid solidification of subcooled small metallic drops: Internal nucleation

William N. Gill, Jiin Yuh Jang, Joseph C. Mollendorf, Colin M. Adam

研究成果: Article

9 引文 (Scopus)

摘要

Solidification of subcooled internally nucleated spheres is analyzed including surface energy and initial radius effects. Accurate and simple rapidly and slowly varying solutions are obtained. Large supercooling leads to enormous heat transfer rates during recalescence, comparable to those obtained in splat cooling, when the liquid shell increases very quickly from the nucleation temperature to the melting point. After recalescence, external convective heat transfer dominates and this period begins when the dimensionless thickness of the solidified core region is approximately equal to the cube root of the Stefan number. A simple analytical expression for complete freezing of the droplets is given. Recalescence is complete in microseconds, a small fraction of the total freezing time, which is typically on the order of milliseconds. The Gibbs-Thompson effect is important only at small times, on the order of 10-10 s, but during this period the growth rate is profoundly effected by surface energy effects.

原文English
頁(從 - 到)351-368
頁數18
期刊Journal of Crystal Growth
66
發行號2
DOIs
出版狀態Published - 1984 一月 1

指紋

rapid solidification
Rapid solidification
Interfacial energy
Freezing
Nucleation
nucleation
Heat transfer
Supercooling
freezing
surface energy
Melting point
Solidification
convective heat transfer
supercooling
Cooling
solidification
melting points
Liquids
heat transfer
cooling

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

引用此文

Gill, William N. ; Jang, Jiin Yuh ; Mollendorf, Joseph C. ; Adam, Colin M. / Rapid solidification of subcooled small metallic drops : Internal nucleation. 於: Journal of Crystal Growth. 1984 ; 卷 66, 編號 2. 頁 351-368.
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Rapid solidification of subcooled small metallic drops : Internal nucleation. / Gill, William N.; Jang, Jiin Yuh; Mollendorf, Joseph C.; Adam, Colin M.

於: Journal of Crystal Growth, 卷 66, 編號 2, 01.01.1984, p. 351-368.

研究成果: Article

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T1 - Rapid solidification of subcooled small metallic drops

T2 - Internal nucleation

AU - Gill, William N.

AU - Jang, Jiin Yuh

AU - Mollendorf, Joseph C.

AU - Adam, Colin M.

PY - 1984/1/1

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N2 - Solidification of subcooled internally nucleated spheres is analyzed including surface energy and initial radius effects. Accurate and simple rapidly and slowly varying solutions are obtained. Large supercooling leads to enormous heat transfer rates during recalescence, comparable to those obtained in splat cooling, when the liquid shell increases very quickly from the nucleation temperature to the melting point. After recalescence, external convective heat transfer dominates and this period begins when the dimensionless thickness of the solidified core region is approximately equal to the cube root of the Stefan number. A simple analytical expression for complete freezing of the droplets is given. Recalescence is complete in microseconds, a small fraction of the total freezing time, which is typically on the order of milliseconds. The Gibbs-Thompson effect is important only at small times, on the order of 10-10 s, but during this period the growth rate is profoundly effected by surface energy effects.

AB - Solidification of subcooled internally nucleated spheres is analyzed including surface energy and initial radius effects. Accurate and simple rapidly and slowly varying solutions are obtained. Large supercooling leads to enormous heat transfer rates during recalescence, comparable to those obtained in splat cooling, when the liquid shell increases very quickly from the nucleation temperature to the melting point. After recalescence, external convective heat transfer dominates and this period begins when the dimensionless thickness of the solidified core region is approximately equal to the cube root of the Stefan number. A simple analytical expression for complete freezing of the droplets is given. Recalescence is complete in microseconds, a small fraction of the total freezing time, which is typically on the order of milliseconds. The Gibbs-Thompson effect is important only at small times, on the order of 10-10 s, but during this period the growth rate is profoundly effected by surface energy effects.

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