Hendrikse, R, Bayly, A and Jimack, P orcid.org/0000-0001-9463-7595 (2023) Anionic surfactant solutions under shear using dissipative particle dynamics. Journal of Chemical Physics, 158. 214906. ISSN 0021-9606
Abstract
We present a dissipative particle dynamics study of surfactant solutions under shear, which allows us to investigate their rheological properties. We consider a variety of concentrations and phase structures, including micellar solutions and liquid crystal phases. It is shown that the viscosity of micellar solutions increases as a function of concentration, in agreement with what is expected from experimental data. We also show that micelles can exhibit shear-thinning behaviour when a shear force is applied, which is a result of micelles breaking down into smaller aggregates. Lamellar and hexagonal phases are found to orientate under the application of shear, in agreement with experimental observations. It is normally suggested that lamellar phases under shear can exhibit a transition between orientations, as the shear rate is increased, usually suggested to be a result of lower viscosity. We calculate the viscosity for different lamellar phase orientations, showing that, although the viscosity of perpendicular orientations is lower than that of parallel orientations, we do not observe a transition to the perpendicular phase at high shear rates. Finally, we show that the choice of Schmidt number has a significant impact on the results, which is of importance for determining the correct behaviour via simulations.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Computing (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 31 May 2023 10:37 |
Last Modified: | 08 Nov 2024 16:12 |
Status: | Published |
Publisher: | American Institute of Physics |
Identification Number: | 10.1063/5.0152673 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:199357 |