Publikation: From equilibrium to steady state : the transient dynamics of colloidal liquids under shear
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2008
Autor:innen
Zausch, Jochen
Horbach, Jürgen
Laurati, Marco
Egelhaaf, Stefan Ulrich
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Transportprozesse in Schmelzen unter Externen Feldern
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Journal of Physics : Condensed Matter. 2008, 20, 404210. Available under: doi: 10.1088/0953-8984/20/40/404210
Zusammenfassung
We investigate stresses and particle motion during the start-up of flow in a colloidal dispersion close to arrest into a glassy state. A combination of molecular dynamics simulation, mode-coupling theory and confocal microscopy experiments is used to investigate the origins of the widely observed stress overshoot and (previously not reported) super-diffusive motion in the transient dynamics. A link between the macro-rheological stress versus strain curves and the microscopic particle motion is established. Negative correlations in the transient auto-correlation function of the potential stresses are found responsible for both phenomena, and arise even for homogeneous flows and almost Gaussian particle displacements.
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ZAUSCH, Jochen, Jürgen HORBACH, Marco LAURATI, Stefan Ulrich EGELHAAF, Joseph M. BRADER, Thomas VOIGTMANN, Matthias FUCHS, 2008. From equilibrium to steady state : the transient dynamics of colloidal liquids under shear. In: Journal of Physics : Condensed Matter. 2008, 20, 404210. Available under: doi: 10.1088/0953-8984/20/40/404210BibTex
@article{Zausch2008equil-4684,
year={2008},
doi={10.1088/0953-8984/20/40/404210},
title={From equilibrium to steady state : the transient dynamics of colloidal liquids under shear},
volume={20},
journal={Journal of Physics : Condensed Matter},
author={Zausch, Jochen and Horbach, Jürgen and Laurati, Marco and Egelhaaf, Stefan Ulrich and Brader, Joseph M. and Voigtmann, Thomas and Fuchs, Matthias},
note={Article Number: 404210}
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