An accurate method for predicting light scattering from soot aggregates with sub-particles of arbitrary shape and structure
Författare
Summary, in English
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.
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.
Publiceringsår
2009
Språk
Engelska
Publikation/Tidskrift/Serie
Technical Report LUTEDX/(TEAT-7179)/1-22/(2009)
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Dokumenttyp
Rapport
Förlag
[Publisher information missing]
Ämne
- Electrical Engineering, Electronic Engineering, Information Engineering
Status
Unpublished
Report number
TEAT-7179
Forskningsgrupp
- Electromagnetic theory