Flow induced morphological instabilities: Stagnation-point flows

K. Brattkus*, S. H. Davis

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

39 Scopus citations

Abstract

We consider a planar stagnation-point flow on a directionally-solidifying interface and determine its effects on its morphological instability. We find that when Schmidt numbers are large, two-dimensional long-wave disturbances are unstable for any degree of constitutional undercooling. These modes propagate against the basic-state flow and are destabilized by the component of this flow normal to the interface. Analogous results are given for the axi-symmetric stagnation-point flow subject to axi-symmetric disturbances. Comparisons are made of the two cases.

Original languageEnglish (US)
Pages (from-to)423-427
Number of pages5
JournalJournal of Crystal Growth
Volume89
Issue number4
DOIs
StatePublished - Jul 1 1988

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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