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Shear Thickening in Non-Brownian Suspensions: An Excluded Volume Effect
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, Centres, SeRC - Swedish e-Science Research Centre. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.ORCID iD: 0000-0001-6162-7112
KTH, School of Engineering Sciences (SCI), Mechanics. KTH, Centres, SeRC - Swedish e-Science Research Centre. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW.ORCID iD: 0000-0002-4346-4732
2013 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 111, no 9, 098302- p.Article in journal (Refereed) Published
Abstract [en]

Shear thickening appears as an increase of the viscosity of a dense suspension with the shear rate, sometimes sudden and violent at high volume fraction. Its origin for noncolloidal suspension with non-negligible inertial effects is still debated. Here we consider a simple shear flow and demonstrate that fluid inertia causes a strong microstructure anisotropy that results in the formation of a shadow region with no relative flux of particles. We show that shear thickening at finite inertia can be explained as an increase of the effective volume fraction when considering the dynamically excluded volume due to these shadow regions.

Place, publisher, year, edition, pages
2013. Vol. 111, no 9, 098302- p.
Keyword [en]
Concentrated Suspensions, Flow, Microstructure, Dispersions, Rheology
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-129117DOI: 10.1103/PhysRevLett.111.098302ISI: 000323610800035Scopus ID: 2-s2.0-84884253848OAI: oai:DiVA.org:kth-129117DiVA: diva2:650197
Funder
Swedish Research Council, 2011-5423Swedish e‐Science Research Center
Note

QC 20130920

Available from: 2013-09-20 Created: 2013-09-19 Last updated: 2017-12-06Bibliographically approved

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Mitra, DhrubadityaBrandt, Luca

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