Structural relaxation and highly viscous flow
arXiv:1711.09669 · doi:10.1063/1.5017218
Abstract
The highly viscous flow is due to thermally activated Eshelby transitions which transform a region of the undercooled liquid to a different structure with a different elastic misfit to the viscoelastic surroundings. A self-consistent determination of the viscosity in this picture explains why the average structural relaxation time is a factor of eight longer than the Maxwell time. The physical reason for the short Maxwell time is the very large contribution of strongly strained inherent states to the fluidity (the inverse viscosity). At the Maxwell time, the viscous no-return processes coexist with the back-and-forth jumping retardation processes.
6 pages, 3 figures, version published in Journal of Chemical Physics
References in corpus (5)
- Theoretical perspective on the glass transition and amorphous materials
- Supercooled Liquids for Pedestrians
- Fifth-order susceptibility unveils growth of thermodynamic amorphous order in glass-formers
- Heterogeneous diffusion, viscosity and the Stokes Einstein relation in binary liquids
- A pragmatical access to the viscous flow