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Particle-like and fluid-like settling of a stratified suspension

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Title: Particle-like and fluid-like settling of a stratified suspension
Authors: Harada, Shusaku Browse this author →KAKEN DB
Mitsui, Takashi Browse this author
Sato, Kodai Browse this author
Keywords: particle
Reyleigh-Taylor Instability
Issue Date: Jan-2012
Publisher: Springer
Journal Title: The European physical journal. E, Soft matter and biological physics
Volume: 35
Start Page: 1
Publisher DOI: 10.1140/epje/i2012-12001-6
PMID: 22228495
Abstract: The gravitational settling of inhomogeneously suspended particles in a fluid has been investigated. Of particular interest is whether collective or individual motion of particles is dominant during their settlings, i.e., whether the particles settle as a continuous suspension or they settle individually relative to the surrounding fluid. We observed the settling of a stratified suspension which has the lower and upper concentration interfaces in a quasi-two-dimensional vessel. In some cases, the suspension behaves perfectly as a continuous fluid and the motion of the constituent particle is subject to bulk flow caused by the interfacial instability. In other cases, the particle behaves individually relative to the surrounding fluid. The existence of a concentration interface plays a significant role in these extreme behaviors of suspension. The transition from the collective to individual behaviors can be predicted quantitatively by a parameter which expresses the border resolution of the concentration interface.
Rights: The original publication is available at
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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