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Post-Flame Soot.

pdf icon Post-Flame Soot. (292 K)
Sorensen, C. M.; Feke, G. D.

National Institute of Standards and Technology (NIST) and Society of Fire Protection Engineers (SFPE). International Conference on Fire Research and Engineering (ICFRE). Proceedings. September 10-15, 1995, Orlando, FL, SFPE, Boston, MA, Lund, D. P.; Angell, E. A., Editor(s)(s), 281-285 pp, 1995.


National Institute of Standards and Technology, Gaithersburg, MD


fire research; smoke; soot; diffusion flames; equations; fractal dimensions; kinetics


We have used an acetylene diffusion flame to create carbonaceous soot. The soot has been physically collected from all portions of the flame and the post-flame region. Inspection of the soot was performed with both transmission electron and optical microscopy. We measure soot cluster radius of gyration and show that these clusters retain their fractal morphology over nearly four orders of magnitude in size. The average fractal dimension is consistent with diffusion Limited Cluster Aggregation (DLCA). We also give evidence that the kinetics of growth when the soot clusters are on the order of lmm may be a gelation mechanism.