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.
Sponsor:National Institute of Standards and Technology,
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.