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dc.contributor.author
Spanjaards, Michelle M.A.
dc.contributor.author
Jaensson, Nick O.
dc.contributor.author
Hulsen, Martien A.
dc.contributor.author
Anderson, Patrick D.
dc.date.accessioned
2019-04-02T07:53:41Z
dc.date.available
2019-04-02T02:56:57Z
dc.date.available
2019-04-02T07:53:41Z
dc.date.issued
2019-03
dc.identifier.other
10.3390/fluids4010025
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/335370
dc.identifier.doi
10.3929/ethz-b-000335370
dc.description.abstract
In this work, a systematic investigation of the migration of sedimenting particles in a viscoelastic Couette flow is presented, using finite element 3D simulations. To this end, a novel computational approach is presented, which allows us to simulate a periodic configuration of rigid spherical particles accurately and efficiently. To study the different contributions to the particle migration, we first investigate the migration of particles sedimenting near the inner wall, without an externally-imposed Couette flow, followed by the migration of non-sedimenting particles in an externally-imposed Couette flow. Then, both flows are combined, i.e., sedimenting particles with an externally-imposed Couette flow, which was found to increase the migration velocity significantly, yielding migration velocities that are higher than the sum of the combined flows. It was also found that the trace of the conformation tensor becomes asymmetric with respect to the particle center when the particle is initially placed close to the inner cylinder. We conclude by investigating the sedimentation velocity with an imposed orthogonal shear flow. It is found that the sedimentation velocity can be both higher or lower then the Newtonian case, depending on the rheology of the suspending fluid. Specifically, a shear-thinning viscosity is shown to play an important role, which is in-line with previously-published results.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
MDPI
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
migration
en_US
dc.subject
sedimentation
en_US
dc.subject
viscoelasticity
en_US
dc.title
A numerical study of particle migration and sedimentation in viscoelastic Couette flow
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2019-02-11
ethz.journal.title
Fluids
ethz.journal.volume
4
en_US
ethz.journal.issue
1
en_US
ethz.pages.start
25
en_US
ethz.size
20 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.scopus
ethz.publication.place
Basel
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2019-04-02T02:57:02Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2019-04-02T07:54:02Z
ethz.rosetta.lastUpdated
2019-04-02T07:54:02Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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