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Open Access Computer Simulation of Aggregation with Consecutive Coalescence and Non-Coalescence Stages in Aerosols

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We report results from computer simulation of aggregation in a system where during the aggregation process particles at first coalesce to spherical particles and then subsequently the coalescence stops and the particles continue to aggregate to form ramified, fractal aggregates. In the model systems studied in our paper, the regime of coalescence and the regime of fractal aggregation are separated in time scales. Such a two-step aggregation process has recently been observed in the explosive generation of silica nanoparticles in a chamber. Our simple model captures the essential features of the experimental work and presents a non-material specific scaling description. We study growth kinetics, cluster morphology, and cluster size distributions as a consequence of both the coalescence and aggregation stages.
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Document Type: Research Article

Affiliations: Department of Physics, Kansas State University, Manhattan, Kansas, USA

Publication date: 01 May 2010

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