Rheology of Polydisperse non-Spherical Graphite Particles Suspended in Mineral Oil

Th Larsen; A. L. Søbye; J. R. Royer; W. C. K. Poon; T. Larsen; S. J. Andreasen; A. D. Drozdov; J. D. C. Christiansen

doi:10.1122/8.0000511

Rheology of Polydisperse non-Spherical Graphite Particles Suspended in Mineral Oil

Th Larsen, A. L. Søbye, J. R. Royer, W. C. K. Poon, T. Larsen, S. J. Andreasen, A. D. Drozdov, J. D. C. Christiansen^*

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

We study the role of filler concentration and microphysics on the rheology of polydisperse flake-graphite particles suspended in Newtonian mineral oil. Under steady shear, our samples exhibit shear thinning and yielding behaviour is observed for volume fractions φ > 0.18. Time-temperature superposition was observed using an Arrhenius-type horizontal shift factor, giving a flow activation energy that is dependent on the graphite volume fraction, suggesting concentration-dependent contributions to relaxation processes in the
suspensions. The flow curves are fitted by a constraint-based model, indicating that the flow behaviour is controlled by frictional and adhesive contacts, with the model suggesting that the adhesive stress is temperature dependent.

Original language	English
Pages (from-to)	81-89
Number of pages	9
Journal	Journal of rheology
Volume	67
Issue number	1
DOIs	https://doi.org/10.1122/8.0000511
Publication status	Published - 8 Nov 2022

Keywords

cond-mat.soft

Access to Document

10.1122/8.0000511

2207.02720v2Accepted author manuscript, 2.28 MBLicence: Creative Commons: Attribution (CC-BY)

https://arxiv.org/abs/2207.02720#Licence: Creative Commons: Attribution (CC-BY)

Cite this

@article{b4d5966fad514e839f76058819435bf9,

title = "Rheology of Polydisperse non-Spherical Graphite Particles Suspended in Mineral Oil",

abstract = "We study the role of filler concentration and microphysics on the rheology of polydisperse flake-graphite particles suspended in Newtonian mineral oil. Under steady shear, our samples exhibit shear thinning and yielding behaviour is observed for volume fractions φ > 0.18. Time-temperature superposition was observed using an Arrhenius-type horizontal shift factor, giving a flow activation energy that is dependent on the graphite volume fraction, suggesting concentration-dependent contributions to relaxation processes in thesuspensions. The flow curves are fitted by a constraint-based model, indicating that the flow behaviour is controlled by frictional and adhesive contacts, with the model suggesting that the adhesive stress is temperature dependent.",

keywords = "cond-mat.soft",

author = "Th Larsen and S{\o}bye, {A. L.} and Royer, {J. R.} and Poon, {W. C. K.} and T. Larsen and Andreasen, {S. J.} and Drozdov, {A. D.} and Christiansen, {J. D. C.}",

year = "2022",

month = nov,

day = "8",

doi = "10.1122/8.0000511",

language = "English",

volume = "67",

pages = "81--89",

journal = "Journal of rheology",

issn = "0148-6055",

publisher = "Society of Rheology",

number = "1",

}

TY - JOUR

T1 - Rheology of Polydisperse non-Spherical Graphite Particles Suspended in Mineral Oil

AU - Larsen, Th

AU - Søbye, A. L.

AU - Royer, J. R.

AU - Poon, W. C. K.

AU - Larsen, T.

AU - Andreasen, S. J.

AU - Drozdov, A. D.

AU - Christiansen, J. D. C.

PY - 2022/11/8

Y1 - 2022/11/8

N2 - We study the role of filler concentration and microphysics on the rheology of polydisperse flake-graphite particles suspended in Newtonian mineral oil. Under steady shear, our samples exhibit shear thinning and yielding behaviour is observed for volume fractions φ > 0.18. Time-temperature superposition was observed using an Arrhenius-type horizontal shift factor, giving a flow activation energy that is dependent on the graphite volume fraction, suggesting concentration-dependent contributions to relaxation processes in thesuspensions. The flow curves are fitted by a constraint-based model, indicating that the flow behaviour is controlled by frictional and adhesive contacts, with the model suggesting that the adhesive stress is temperature dependent.

AB - We study the role of filler concentration and microphysics on the rheology of polydisperse flake-graphite particles suspended in Newtonian mineral oil. Under steady shear, our samples exhibit shear thinning and yielding behaviour is observed for volume fractions φ > 0.18. Time-temperature superposition was observed using an Arrhenius-type horizontal shift factor, giving a flow activation energy that is dependent on the graphite volume fraction, suggesting concentration-dependent contributions to relaxation processes in thesuspensions. The flow curves are fitted by a constraint-based model, indicating that the flow behaviour is controlled by frictional and adhesive contacts, with the model suggesting that the adhesive stress is temperature dependent.

KW - cond-mat.soft

U2 - 10.1122/8.0000511

DO - 10.1122/8.0000511

M3 - Article

VL - 67

SP - 81

EP - 89

JO - Journal of rheology

JF - Journal of rheology

SN - 0148-6055

IS - 1

ER -

Rheology of Polydisperse non-Spherical Graphite Particles Suspended in Mineral Oil

Abstract

Keywords

Access to Document

Fingerprint

Cite this