Townsend, AK;
Wilson, HJ;
(2018)
Small- and large-amplitude oscillatory rheometry with bead-spring dumbbells in Stokesian Dynamics to mimic viscoelasticity.
Journal of Non-Newtonian Fluid Mechanics
, 261
pp. 136-152.
10.1016/j.jnnfm.2018.08.010.
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Abstract
In many areas of suspension mechanics, such as filled polymer fluids or household products such as toothpaste, the suspending fluid itself is inherently non-Newtonian and may exhibit viscoelastic properties. In this paper, we extend the Stokesian Dynamics formalism to incorporate a simple model of viscoelasticity by using small spheres as ‘beads’ in a bead–spring dumbbell (such as is found in the derivation of Oldroyd and FENE constitutive models for dilute polymer solutions). Various different spring laws are then tested in both small-amplitude and large-amplitude oscillatory shear, and their rheological behaviour is compared to continuum constitutive models.
| Type: | Article |
|---|---|
| Title: | Small- and large-amplitude oscillatory rheometry with bead-spring dumbbells in Stokesian Dynamics to mimic viscoelasticity |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jnnfm.2018.08.010 |
| Publisher version: | https://doi.org/10.1016/j.jnnfm.2018.08.010 |
| Language: | English |
| Additional information: | © 2018 The Authors. This is an open access article under the CC BY license. (http://creativecommons.org/licenses/by/4.0/) |
| Keywords: | Oscillatory rheometry, Stokesian Dynamics, Dumbbells, SAOS, LAOS, Simulations, FENE force laws |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Mathematics |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10055629 |
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