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URN to cite this document: urn:nbn:de:bvb:703-epub-7667-0
Title data
Sammüller, Florian ; de las Heras, Daniel ; Schmidt, Matthias:
Inhomogeneous steady shear dynamics of a three-body colloidal gel former.
In: The Journal of Chemical Physics.
Vol. 158
(2023)
Issue 5
.
- 054908.
ISSN 0021-9606
DOI der Verlagsversion: https://doi.org/10.1063/5.0130655
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Project information
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Deutsche Forschungsgemeinschaft |
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Abstract
We investigate the stationary flow of a colloidal gel under an inhomogeneous external shear force using adaptive Brownian dynamics simulations. The interparticle forces are derived from the Stillinger–Weber potential, where the three-body term is tuned to enable network formation and gelation in equilibrium. When subjected to the shear force field, the system develops remarkable modulations in the one-body density profile. Depending on the shear magnitude, particles accumulate either in quiescent regions or in the vicinity of maximum net flow, and we deduce this strong non-equilibrium response to be characteristic of the gel state. Studying the components of the internal force parallel and perpendicular to the flow direction reveals that the emerging flow and structure of the stationary state are driven by significant viscous and structural superadiabatic forces. Thereby, the magnitude and nature of the observed non-equilibrium phenomena differ from the corresponding behavior of simple fluids. We demonstrate that a simple power functional theory reproduces accurately the viscous force profile, giving a rationale of the complex dynamical behavior of the system.
Further data
| Item Type: | Article in a journal |
|---|---|
| DDC Subjects: | 500 Science > 530 Physics |
| Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics II > Chair Theoretical Physics II - Univ.-Prof. Dr. Matthias Schmidt Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics II |
| Language: | English |
| Originates at UBT: | Yes |
| URN: | urn:nbn:de:bvb:703-epub-7667-0 |
| Date Deposited: | 02 Apr 2024 06:33 |
| Last Modified: | 02 Apr 2024 06:33 |
| URI: | https://epub.uni-bayreuth.de/id/eprint/7667 |
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