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Numerical simulation of concentration interface in stratified suspension : Continuum–particle transition

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Title: Numerical simulation of concentration interface in stratified suspension : Continuum–particle transition
Authors: Yamamoto, Yasufumi Browse this author
Hisataka, Fumiya Browse this author
Harada, Shusaku Browse this author →KAKEN DB
Keywords: Stratified suspension
Concentration interface
Numerical simulation
Fingering instability
Issue Date: Jul-2015
Publisher: Elsevier
Journal Title: International Journal of Multiphase Flow
Volume: 73
Start Page: 71
End Page: 79
Publisher DOI: 10.1016/j.ijmultiphaseflow.2015.03.007
Abstract: Behavior of concentration interfaces, which are apparent interfaces between a suspension and pure liquid, was studied using numerical techniques. Two types of numerical simulations were used to classify whether collective or individual behavior occurred in the ratio of the average particle separation to the wavelength of the fastest growing perturbation. The first is Lagrangian tracking of individual particles in fluid, and the second type is interface tracking of two immiscible continuum phases. These two extremely different approaches represent the dual nature of the concentration interface: immiscible with no interfacial tension and miscible with no diffusion. These results reflect the experimentally-observed behavior of particles, which is both collective and individual. Sealing of the concentration interface by particle-induced flow is crucial to collective motion of suspended particles. A proposed dimensionless parameter describes quantitatively the transition from collective to individual settling of suspended particles.
Rights: ©2015. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
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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