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Dependence of fragmentation behavior of colloidal aggregates on their fractal structure

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Title: Dependence of fragmentation behavior of colloidal aggregates on their fractal structure
Authors: Harada, S. Browse this author →KAKEN DB
Tanaka, R. Browse this author
Nogami, H. Browse this author
Sawada, M. Browse this author
Keywords: Aggregate
Shear flow
Numerical analysis
Stokesian dynamics
Issue Date: 1-Sep-2006
Publisher: Elsevier Inc.
Journal Title: Journal of Colloid and Interface Science
Volume: 301
Issue: 1
Start Page: 123
End Page: 129
Publisher DOI: 10.1016/j.jcis.2006.04.051
PMID: 16697393
Abstract: The fragmentation dynamics of aggregate of non-Brownian particles in shear flow is investigated numerically. The breakup behaviors of aggregates having the same connectivity but the different space-filling properties are examined. The Lagrangian particle simulation in a linear flow field is performed. The effect of surrounding fluid on the motion of multiple particles is estimated by Stokesian dynamics approach. The inter-particle force is calculated from the retarded van der Waals potential based on the Lifshitz theory. The results obtained in this work indicate that the fragmentation behavior of colloidal aggregates depends on their fractal structure. However, if the resultant aggregate size is smaller than the critical one, the fragmentation behavior shows the universality regardless of their original structure. Furthermore, the restructuring of aggregate in shear flow and its effect on the fragmentation process are also discussed.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 原田 周作

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