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Rheology of suspensions of viscoelastic spheres: Deformability as an effective volume fraction
KTH, Centres, SeRC - Swedish e-Science Research Centre. KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Mechanics.
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
KTH, Centres, Nordic Institute for Theoretical Physics NORDITA.ORCID iD: 0000-0001-6162-7112
2018 (English)In: PHYSICAL REVIEW FLUIDS, ISSN 2469-990X, Vol. 3, no 1, article id 012301Article in journal (Refereed) Published
Abstract [en]

We study suspensions of deformable (viscoelastic) spheres in a Newtonian solvent in planeCouette geometry, by means of direct numerical simulations. We find that in the limit of vanishing inertia, the effective viscosity mu of the suspension increases as the volume fraction occupied by the spheres Phi increases and decreases as the elastic modulus of the spheres G decreases; the function mu(Phi,G) collapses to a universal function mu(Phi(e)) with a reduced effective volume fraction Phi(e)(Phi,G). Remarkably, the function mu(Phi(e)) is the well- known Eilers fit that describes the rheology of suspension of rigid spheres at all Phi. Our results suggest different ways to interpret the macrorheology of blood.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2018. Vol. 3, no 1, article id 012301
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-222424DOI: 10.1103/PhysRevFluids.3.012301ISI: 000423329600002Scopus ID: 2-s2.0-85041513824OAI: oai:DiVA.org:kth-222424DiVA, id: diva2:1186349
Note

QC 20180228

Available from: 2018-02-28 Created: 2018-02-28 Last updated: 2018-05-24Bibliographically approved

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Brandt, L.ucaMitra, Dhrubaditya

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Rosti, Marco E.Brandt, L.ucaMitra, Dhrubaditya
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SeRC - Swedish e-Science Research CentreLinné Flow Center, FLOWMechanicsNordic Institute for Theoretical Physics NORDITA
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