Flow field effects on nucleation in a reacting mixing layer

I. M. Kennedy

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Chemical nucleation has been studied numerically in a stagnation point mixing layer in which reactants in two counter-flowing streams form a condensable monomer. The response of the subsequent nucleation kinetics to the velocity gradient in the flow is described in terms of a Damkohler number. Two limiting cases have been established. First, if the Damkohler number for monomer production is small, i.e., the rate of monomer production is slow, then the nucleation of particles can be strongly affected by the flow field in a manner which is equivalent to the effect of supersaturation in a uniform vapor. Second, if the Damkohler numbers for cluster growth are small (because of a small accommodation factor for monomer-cluster interactions), the concentrations of clusters do not achieve equilibrium levels. This can result in the suppression of particle formation over a critical range of Damkohler numbers. In this case the behavior of the nucleation kinetics is analogous to the transient phase of nucleation in a uniform vapor.

Original languageEnglish (US)
Pages (from-to)3515-3524
Number of pages10
JournalPhysics of Fluids
Issue number12
StatePublished - 1985
Externally publishedYes

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Mechanics of Materials
  • Computational Mechanics
  • Fluid Flow and Transfer Processes


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