Journal
JOURNAL OF PHYSICS-CONDENSED MATTER
Volume 24, Issue 46, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/24/46/464105
Keywords
-
Categories
Funding
- SFB Transregio TR6 'Physics of Colloidal Dispersions in External Fields' [A5, A7]
- Helmholtz-Forschungsgemeinschaft (Impuls- und Vernetzungsfonds) [VH-NG-406]
- Zukunftskolleg der Universitat Konstanz
Ask authors/readers for more resources
We investigate the force-induced diffusive motion of a tracer particle inside a glass-forming suspension when a strong external force is applied to the probe (active nonlinear microrheology). A schematic model of mode-coupling theory introduced recently is extended to describe the transient dynamics of the probe particle, and used to analyze recent molecular-dynamics simulation data. The model describes non-trivial transient displacements of the probe before a steady-state velocity is reached. The external force also induces diffusive motion in the direction perpendicular to its axis. We address the relation between the transverse diffusion coefficient D-perpendicular to and the force-dependent nonlinear friction coefficient zeta. Non-diffusive fluctuations in the direction of the force are seen at long times in the MD simulation, while the model describes cross-over to long-time diffusion.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available