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Author
V. Chikkadi
S. Mandal
B. Nienhuis
D. Raabe
F. Varnik
P. Schall
Year
2012
Title
Shear-induced anisotropic decay of correlations in hard-sphere colloidal glasses
Journal
Europhysics Letters
Volume | Issue number
100 | 5
Pages (from-to)
56001
Number of pages
6
Document type
Article
Faculty
Faculty of Science (FNWI)
Institute
Van der Waals-Zeeman Institute (WZI)
Abstract
Spatial correlations of microscopic fluctuations are investigated via real-space experiments and computer simulations of colloidal glasses under steady shear. It is shown that while the distribution of one-particle fluctuations is always isotropic regardless of the relative importance of shear as compared to thermal fluctuations, their spatial correlations show a marked sensitivity to the competition between shear-induced and thermally activated relaxation. Correlations are isotropic in the thermally dominated regime, but develop strong anisotropy as shear dominates the dynamics of microscopic fluctuations. We discuss the relevance of this observation for a better understanding of flow heterogeneity in sheared amorphous solids.
URL
go to publisher's site
Language
English
Permalink
http://hdl.handle.net/11245/1.381232
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  • shear.pdf

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