Abstract
The flow-induced microstructural distortions of dense colloidal dispersions under steady shearing are derived within a recent first-principles approach to the nonlinear rheology of colloidal fluids and glasses. The stationary structure factor is discussed to leading orders in shear rate . We find that shear affects the stationary structure whenever the dressed Peclet/Weissenberg number becomes appreciable; here τ is the structural or α-relaxation time. Close to vitrification, this predicts significantly larger shear distortions than expected from considering the bare Peclet number Pe0; it compares with the diffusion time of a colloid at infinite dilution.
| Language | English |
|---|---|
| Article number | 205132 |
| Number of pages | 6 |
| Journal | Journal of Physics: Condensed Matter |
| Volume | 19 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 25 Apr 2007 |
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Keywords
- diffusion
- microstructure
- Peclet number
- rheology
- shear stress
- structural relaxation
Cite this
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Nonequilibrium structure of concentrated colloidal fluids under steady shear : leading-order response. / Henrich, Oliver; Pfeifroth, Oskar; Fuchs, Matthias.
In: Journal of Physics: Condensed Matter, Vol. 19, No. 20, 205132, 25.04.2007.Research output: Contribution to journal › Article
TY - JOUR
T1 - Nonequilibrium structure of concentrated colloidal fluids under steady shear
T2 - Journal of Physics: Condensed Matter
AU - Henrich, Oliver
AU - Pfeifroth, Oskar
AU - Fuchs, Matthias
PY - 2007/4/25
Y1 - 2007/4/25
N2 - The flow-induced microstructural distortions of dense colloidal dispersions under steady shearing are derived within a recent first-principles approach to the nonlinear rheology of colloidal fluids and glasses. The stationary structure factor is discussed to leading orders in shear rate . We find that shear affects the stationary structure whenever the dressed Peclet/Weissenberg number becomes appreciable; here τ is the structural or α-relaxation time. Close to vitrification, this predicts significantly larger shear distortions than expected from considering the bare Peclet number Pe0; it compares with the diffusion time of a colloid at infinite dilution.
AB - The flow-induced microstructural distortions of dense colloidal dispersions under steady shearing are derived within a recent first-principles approach to the nonlinear rheology of colloidal fluids and glasses. The stationary structure factor is discussed to leading orders in shear rate . We find that shear affects the stationary structure whenever the dressed Peclet/Weissenberg number becomes appreciable; here τ is the structural or α-relaxation time. Close to vitrification, this predicts significantly larger shear distortions than expected from considering the bare Peclet number Pe0; it compares with the diffusion time of a colloid at infinite dilution.
KW - diffusion
KW - microstructure
KW - Peclet number
KW - rheology
KW - shear stress
KW - structural relaxation
UR - http://www.scopus.com/inward/record.url?scp=34247472501&partnerID=8YFLogxK
UR - http://iopscience.iop.org/journal/0953-8984
U2 - 10.1088/0953-8984/19/20/205132
DO - 10.1088/0953-8984/19/20/205132
M3 - Article
VL - 19
JO - Journal of Physics: Condensed Matter
JF - Journal of Physics: Condensed Matter
SN - 0953-8984
IS - 20
M1 - 205132
ER -