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From equilibrium to steady state: The transient dynamics of colloidal liquids under shear
- Publication Year :
- 2008
-
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.<br />Comment: 24 pages, 14 figures, J. Phys.: Condens. Matter, in press
- Subjects :
- Materials science
Gaussian
FOS: Physical sciences
Condensed Matter - Soft Condensed Matter
confocal microscopy
Molecular dynamics
symbols.namesake
Colloid
ddc:530
General Materials Science
Colloids, Glasses, Shear, Dynamics, Transient
Magnetosphere particle motion
glass forming liquids under shear
mode coupling serie
Disordered Systems and Neural Networks (cond-mat.dis-nn)
Mechanics
Condensed Matter - Disordered Systems and Neural Networks
Condensed Matter Physics
Start up
molecular dynamics
Condensed Matter::Soft Condensed Matter
Shear (geology)
Homogeneous
Mode coupling
symbols
Soft Condensed Matter (cond-mat.soft)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....5e1ad811038e8b4fa8583c49babbe7e3