An accurate method for predicting light scattering from soot aggregates with sub-particles of arbitrary shape and structure

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Abstract

Soot particles can be formed in hydrocarbon flames as a result of an inefficient combustion process. The particles are near-spherical, and normally a few tens of nanometers in diameter. At later stages in the soot growth process, they form chain-like sparse aggregates. When applying optical diagnostic methods such as combined scattering and extinction measurements in sooting flames, this aggregation influences the evaluation of soot properties based on assumptions of isolated particles.
In this paper an efficient and accurate method for calculating scattering of light from these structures is presented. The method can handle aggregates with several hundred sub-particles with no restrictions on shape, internal structure, or conglutination of the sub-particles. The basic idea is that the induced dipole moments of the sub-particles are determined from the solution of a quasi-static problem that can be solved with high accuracy by, e.g., the finite element method.
Original languageEnglish
Publisher[Publisher information missing]
VolumeTEAT-7179
Publication statusUnpublished - 2009

Publication series

NameTechnical Report LUTEDX/(TEAT-7179)/1-22/(2009)
VolumeTEAT-7179

Subject classification (UKÄ)

  • Electrical Engineering, Electronic Engineering, Information Engineering

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