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Strength Deterioration of Nonfractal Particle Aggregates in Simple Shear Flow

langmuir.31(2015).7909-7918.pdf3.96 MBPDF見る/開く

タイトル: Strength Deterioration of Nonfractal Particle Aggregates in Simple Shear Flow
著者: Horii, Kento 著作を一覧する
Yamada, Reiko 著作を一覧する
Harada, Shusaku 著作を一覧する
発行日: 2015年 7月
出版者: American Chemical Society
誌名: Langmuir
巻: 31
号: 29
開始ページ: 7909
終了ページ: 7918
出版社 DOI: 10.1021/acs.langmuir.5b00197
抄録: The restructuring of a nonfractal particle aggregate in simple shear flow was simulated by a Stokesian dynamics approach. We studied the deformation and the resultant strength change of aggregates by the surrounding flow under the condition that the cohesive strength of an aggregate is comparable to the fluid stress. In particular, we focused on how the aggregate deteriorates because of the fluid stress exerted on it periodically. The image analysis was applied to visualized simulation results for the quantitative estimation of irreversible change in an aggregate configuration. We examined the structural change in the aggregate from various perspectives, i.e., the outer shape, the internal strength, and the fluid stress on the surface of the aggregate. The simulation results show that the aggregate gets squashed after an intricate restructuring process and it elongates along with the streamline as experimentally observed in the previous study. Regarding the internal strength, the weakest point locally develops in the aggregate by periodically varying the fluid stress. A combination of rotation and elongation effects of shear flow is complexly involved in the deterioration of the internal strength of the aggregate.
Rights: This document is the unedited Author's version of a Submitted Work that was subsequently accepted forpublication in Langmuir, copyright © American Chemical Society after peer review. To access the final edited and published work see
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 原田 周作


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