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Characterization of the Structure of Agglomerate Particles

Rogak, Steven N. and Flagan, Richard C. (1992) Characterization of the Structure of Agglomerate Particles. Particle and Particle Systems Characterization, 9 (1-4). pp. 19-27. ISSN 0934-0866. doi:10.1002/ppsc.19920090104.

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Agglomerates of uniformly sized primary spheres are found in many aerosol and colloidal systems. Such particles have been described as fractal although they possess selfsimilarity over only a narrow range of length scales. Previous work suggests that, for such objects, ideal fractal scaling laws may require substantial corrections. The problem is particularly acute for measurements of particle structure from 2d images. The relation between the structure of an agglomerate and the characteristics of its projection is investigated using simple analytical models and clusters generated by a modified cluster cluster aggregation simulation. The morphology of the simulated clusters is varied by changing the ratio of masses of the colliding clusters. The fractal dimensions D_(f3) of the simulated clusters were typically 10–20% higher than those measured for the projections, D_(f2), even though D_(f3) > 2. This difference decreases as the cluster size increases. It was found that the fraction of primary particles visible in the 2d image is more sensitive to cluster size than to fractal dimension for clusters with less than several thousand primary particles.

Item Type:Article
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URLURL TypeDescription
Rogak, Steven N.0000-0002-4418-517X
Flagan, Richard C.0000-0001-5690-770X
Additional Information:© 1992 Verlag GmbH & Co. KGaA, Weinheim. (Received : 10 May 1991) This work was supported by the International Fine Particle Research Institute and by the U. S. Department of Energy under grant Nos. DE-FG22-90PC90286 and DE-AC22-86PC90751.
Funding AgencyGrant Number
International Fine Particle Research InstituteUNSPECIFIED
Department of Energy (DOE)DE-FG22-90PC90286
Department of Energy (DOE)DE-AC22-86PC90751
Issue or Number:1-4
Record Number:CaltechAUTHORS:20150805-112247465
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Official Citation:Rogak, S. N. and Flagan, R. C. (1992), Characterization of the Structure of Agglomerate Particles. Part. Part. Syst. Charact., 9: 19–27. doi: 10.1002/ppsc.19920090104
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:59230
Deposited By: Irina Meininger
Deposited On:09 Dec 2015 20:53
Last Modified:19 Apr 2023 23:06

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