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Nucleation and growth of oxide particles in metal vapour flames

Authors
Journal
Combustion and Flame
0010-2180
Publisher
Elsevier
Publication Date
Volume
13
Issue
3
Identifiers
DOI: 10.1016/0010-2180(69)90003-0

Abstract

Abstract A set of equations describing the condensation of aluminium oxide droplets from an atmosphere containing metal vapour and oxygen has been formulated and programmed for solution on a high-speed digital computer. The initial formation of the particles is described by classical nucleation theory; particle growth takes place by diffusion of metal and oxygen to the particle surface followed by reaction on the surface to form condensed oxide. Starting with a given mass fraction of metal vapour, condensation takes place both by nucleation of new particles and growth of all the particles in the system until the partial pressure of metal vapour decreases to the equilibrium value. The time required for condensation and the resulting particle size distribution have been calculated for different initial metal vapour concentrations and temperatures.

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