The dynamics of transient ostwald ripening

M. K. Chen, P. W. Voorhees1

Research output: Contribution to journalArticle

65 Scopus citations

Abstract

We examine numerically the time-dependent behaviour of a two-phase system undergoing transient Ostwald ripening. The evolution of selected initial particle-radius- distribution (pro) functions was followed to over three orders of magnitude in time. Although steady-state coarsening behaviour was never fully achieved, the existence of the Lifshitz-Slyozov (LS) attractor prd and scaling laws for 7 and Nv was essentially confirmed for all the initial pros studied in systems with a zero volume fraction of coarsening phase. The transition path to steady-state coarsening was highly dependent upon the initial prd. Phase-plane plots illustrated this dependence and showed the large basin of attraction for the LS prd. In addition, changes in the initial form of a given prd within a fixed class of pros were found to affect strongly the transient coarsening rate; for example, wide log-normal pros evolved more rapidly than did narrow ones. Calculations were also done to examine the effect of a finite volume fraction of coarsening phase on the extent of the transient regime. The results showed that the system evolved to its steady-state form more rapidly at non-zero volume fraction than at zero volume fraction. Finally, we present a comparison of our calculations with other experimental and theoretical studies of transient coarsening behaviour.

Original languageEnglish (US)
Pages (from-to)591-612
Number of pages22
JournalModelling and Simulation in Materials Science and Engineering
Volume1
Issue number5
DOIs
StatePublished - Oct 1993

ASJC Scopus subject areas

  • Modeling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Computer Science Applications

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