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From Equilibrium to Steady State: The Transient Dynamics of Colloidal Liquids under Shear

Zausch, J. and Horbach, J. and Laurati, M. and Egelhaaf, S. U. and Brader, J. M. and Voigtmann, T. and Fuchs, M. (2008) From Equilibrium to Steady State: The Transient Dynamics of Colloidal Liquids under Shear. Journal of Physics - Condensed Matter, 20, 404210/1-404210/13. DOI: 10.1088/0953-8984/20/40/404210

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Abstract

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 experiment 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.

Item URL in elib:https://elib.dlr.de/54872/
Document Type:Article
Title:From Equilibrium to Steady State: The Transient Dynamics of Colloidal Liquids under Shear
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Zausch, J.Johannes-Gutenberg-Universität MainzUNSPECIFIED
Horbach, J.UNSPECIFIEDUNSPECIFIED
Laurati, M.Heinrich-Heine-Universität DüsseldorfUNSPECIFIED
Egelhaaf, S. U.Heinrich-Heine-Universität DüsseldorfUNSPECIFIED
Brader, J. M.Universität KonstanzUNSPECIFIED
Voigtmann, T.UNSPECIFIEDUNSPECIFIED
Fuchs, M.Universität KonstanzUNSPECIFIED
Date:2008
Journal or Publication Title:Journal of Physics - Condensed Matter
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:Yes
Volume:20
DOI :10.1088/0953-8984/20/40/404210
Page Range:404210/1-404210/13
Status:Published
Keywords:molecular dynamics, glass forming liquids under shear, confocal microscopy, mode coupling serie
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W FR - Forschung unter Weltraumbedingungen (old)
DLR - Research area:Space
DLR - Program:W FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):W - Vorhaben Materialwissenschaftliche Forschung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Physics in Space
Deposited By: Parpart, Ingeborg
Deposited On:21 Oct 2008
Last Modified:27 Apr 2009 15:08

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