Structural predictor for nonlinear sheared dynamics in simple glass-forming liquids.

ABSTRACT: Glass-forming liquids subjected to sufficiently strong shear universally exhibit striking nonlinear behavior; for example, a power-law decrease of the viscosity with increasing shear rate. This phenomenon has attracted considerable attention over the years from both fundamental and applicational viewpoints. However, the out-of-equilibrium and nonlinear nature of sheared fluids have made theoretical understanding of this phenomenon very challenging and thus slower to progress. We find here that the structural relaxation time as a function of the two-body excess entropy, calculated for the extensional axis of the shear flow, collapses onto the corresponding equilibrium curve for a wide range of pair potentials ranging from harsh repulsive to soft and finite. This two-body excess entropy coll

SUBMITTER: Ingebrigtsen TS 

PROVIDER: S-EPMC5776798 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature