Rapid solidification of subcooled small metallic drops

William N. Gill, Jiin-Yuh Jang, Joseph C. Mollendorf

Research output: Contribution to journalArticle

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Abstract

Accurate rapidly and slowly varying analytical solutions are obtained for the problem of the rapid solidification by convection of subcooled small metallic drops. These solutions, which were suggested by the approximate results obtained by using a quasi-moving-boundary approach, are useful in estimating metallurgical parameters in rapid rate solidification technology. The rapidly varying regular perturbation solution describes recalescence during which the liquid core increases very quickly from the nucleation temperature to the melting point. Enormous internal heat transfer rates dominate the process, and the solid-liquid interface is morphologically unstable, during recalescence. External convective heat transfer dominates after recalescence, and the slowly varying solution shows that this period begins when the dimensionless thickness of the solidified region is approximately equal to 1 -(1 — S)1/3. The position of the interface after recalescense is given by (I — S — 3 Hθ)1/3. Complete freezing of the droplets occurs at time t -(R21)(1— S)/3H. The time required for recalescence is on the order of microseconds and is usually only a small fraction of the total freezing time.

Original languageEnglish
Pages (from-to)3-31
Number of pages29
JournalChemical Engineering Communications
Volume12
Issue number1-3
DOIs
Publication statusPublished - 1981 Oct 1

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Rapid solidification
Freezing
Heat transfer
Liquids
Melting point
Solidification
Nucleation
Temperature
Convection

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

Gill, William N. ; Jang, Jiin-Yuh ; Mollendorf, Joseph C. / Rapid solidification of subcooled small metallic drops. In: Chemical Engineering Communications. 1981 ; Vol. 12, No. 1-3. pp. 3-31.
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Rapid solidification of subcooled small metallic drops. / Gill, William N.; Jang, Jiin-Yuh; Mollendorf, Joseph C.

In: Chemical Engineering Communications, Vol. 12, No. 1-3, 01.10.1981, p. 3-31.

Research output: Contribution to journalArticle

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