Growth of fractal structures in flames with silicon admixture

B. M. Smirnov*, M. Dutka, V. M. van Essen, S. Gersen, P. Visser, D. Vainchtein, J. Th. M. De Hosson, H. B. Levinsky, A. V. Mokhov

*Corresponding author for this work

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Abstract

Transmission electron microscopy (TEM) measurements and theoretical analysis are combined to construct the physical picture of formation of SiO2 fractal aggregates in a methane/hexamethyldisiloxane/air atmospheric pressure flame. The formation of SiO2 fractal aggregates is described as a multistage process. The first stage is combustion of fuel in a narrow flame front region with formation of main combustion products including SiO2 molecules. Further downstream SiO2 molecules join in liquid nanoclusters. After cooling combustion products due to heat losses to surroundings, the nanoclusters become solid in a cold flame region and join in fractal aggregates there. Along with growth of fractal aggregates, the restructuring process proceeds in a cold flame region that leads to the decrease of the fractal dimension of fractal aggregates. The measured parameters of fractal aggregates are in accord with those followed from theoretical models. Copyright (C) EPLA, 2012

Original languageEnglish
Article number66005
Pages (from-to)66005-p1-66005-p6
Number of pages6
JournalEurophysics Letters
Volume98
Issue number6
DOIs
Publication statusPublished - Jun-2012

Keywords

  • COUNTERFLOW DIFFUSION FLAME
  • PARTICLES
  • CLUSTERS
  • AGGREGATION
  • SURFACE
  • OXIDE
  • GAS

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