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Macroscopic and microscopic hydrodynamic mixing of stratified suspensions

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Title: Macroscopic and microscopic hydrodynamic mixing of stratified suspensions
Authors: Yamamoto, Yasufumi Browse this author
Yamada, Koki Browse this author
Tanaka, Yohsuke Browse this author
Harada, Shusaku Browse this author →KAKEN DB
Issue Date: 27-Aug-2021
Publisher: American Physical Society (APS)
Journal Title: Physical Review E
Volume: 104
Issue: 2
Start Page: 025111
Publisher DOI: 10.1103/PhysRevE.104.025111
Abstract: We conducted numerical experiments to investigate the mixing of stratified suspensions containing different types of particles. We used a point-force two-way coupling method. We studied the mixing behavior of stratified suspensions and we discovered two types of mixing: microscopic (individual-particle-level) and macroscopic (vessel-scale) collective mixing. In addition, we examined the vertical mixing speed of the stratified suspension. We used a simple theoretical model to analyze the fingering settling velocity. Then we introduced a nondimensional number representing the difference in collectivities of the upper and lower suspensions while accounting for particle terminal velocities. We discovered that the proposed nondimensional parameter has a negative sign that distinguishes the mixing form of only microscopic individual-particle-level mixing and a positive value that predicts the speed of macroscopic collective mixing of stratified suspensions.
Rights: Copyright (2021) by The American Physical Society.
Type: article
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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