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Rheology of dense fiber suspensions: Origin of yield stress, shear thinning, and normal stress differences
Department of Mechanical Engineering, Purdue University, Indiana 47905, USA.
Department of Mechanical Engineering, Purdue University, Indiana 47905, USA.
KTH, School of Engineering Sciences (SCI), Centres, Linné Flow Center, FLOW. KTH, School of Engineering Sciences (SCI), Engineering Mechanics, Fluid Mechanics and Engineering Acoustics.ORCID iD: 0000-0002-4346-4732
Department of Mechanical Engineering, Purdue University, Indiana 47905, USA.
Number of Authors: 42023 (English)In: Physical Review Fluids, E-ISSN 2469-990X, Vol. 8, no 6, article id 064306Article in journal (Refereed) Published
Abstract [en]

We explain the origins of yield stress, shear thinning, and normal stress differences in rigid fiber suspensions. We investigate the interplay between the hydrodynamic, noncontact attractive and repulsive, and interfiber contact interactions. The shear-thinning viscosity and finite yield stress obtained from the Immerse Boundary Method simulations are in quantitative agreement with experiential results from the literature. In this study, we show that attractive interactions result in yield stress and shear thinning rheology in the suspensions of rigid fibers. This is an important finding, given the ongoing discussion regarding the origin of the yield stress for suspensions of fibers. The ability of the proposed model to quantitatively predict the rheology is not limited to only shear thinning and yield stress but also extends to normal stresses.

Place, publisher, year, edition, pages
American Physical Society (APS) , 2023. Vol. 8, no 6, article id 064306
National Category
Applied Mechanics Fluid Mechanics and Acoustics
Identifiers
URN: urn:nbn:se:kth:diva-334626DOI: 10.1103/PhysRevFluids.8.064306ISI: 001051428400004Scopus ID: 2-s2.0-85163969271OAI: oai:DiVA.org:kth-334626DiVA, id: diva2:1790711
Note

QC 20230823

Available from: 2023-08-23 Created: 2023-08-23 Last updated: 2023-09-21Bibliographically approved

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Brandt, Luca

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CiteExportLink to record
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