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dc.contributor.authorGuazzelli, Élisabeth
dc.contributor.authorHinch, John
dc.date.accessioned2016-02-25T13:19:05Z
dc.date.available2016-02-25T13:19:05Z
dc.date.issued2011-01-21
dc.identifier.citationGuazzelli É, Hinch J (2011) Fluctuations and Instability in Sedimentation. Annual Review of Fluid Mechanics 43: 97–116. Available: http://dx.doi.org/10.1146/annurev-fluid-122109-160736.
dc.identifier.issn0066-4189
dc.identifier.issn1545-4479
dc.identifier.doi10.1146/annurev-fluid-122109-160736
dc.identifier.urihttp://hdl.handle.net/10754/598345
dc.description.abstractThis review concentrates on the fluctuations of the velocities of sedimenting spheres, and on the structural instability of a suspension of settling fibers. For many years, theoretical estimates and numerical simulations predicted the fluctuations of the velocities of spheres to increase with the size of the container, whereas experiments found no such variation. Two ideas have increased our understanding. First, the correlation length of the velocity fluctuations was found experimentally to be 20 interparticle separations. Second, in dilute suspensions, a vertical variation in the concentration due to the spreading of the front with the clear fluid can inhibit the velocity fluctuations. In a very dilute regime, a homogeneous suspension of fibers suffers a spontaneous instability in which fast descending fiber-rich columns are separated by rising fiber-sparse columns. In a semidilute regime, the settling is hindered, more so than for spheres. © 2011 by Annual Reviews. All rights reserved.
dc.description.sponsorshipWe thank L. Bergougnoux, J.E. Butler, B. Metzger, M. Nicolas, D. Saintillan, and P. Snabre forsupplying data, figures, and movies. While writing this, E.J.H. was partially supported by awardKUK-C1-013-04 made by King Abdullah University of Science and Technology (KAUST).
dc.publisherAnnual Reviews
dc.subjectdiffusion
dc.subjectlow Reynolds number
dc.subjectslender body
dc.subjectstructural instability
dc.subjectsuspension
dc.titleFluctuations and Instability in Sedimentation
dc.typeArticle
dc.identifier.journalAnnual Review of Fluid Mechanics
dc.contributor.institutionIUSTI Institut Universitaire des Systemes Thermiques Industriels, Marseille, France
dc.contributor.institutionUniversity of Cambridge, Cambridge, United Kingdom
kaust.grant.numberKUK-C1-013-04


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