An asymmetry model for the highly viscous flow

TL;DR

This paper presents an asymmetry model for highly viscous flow, emphasizing local structural rearrangements and their elastic misfits, explaining the Kohlrausch behavior near the Maxwell time.

Contribution

It introduces a time-dependent asymmetry model that accounts for elastic interactions and structural rearrangements in viscous flow.

Findings

Explains Kohlrausch behavior via local rearrangements

Highlights the role of elastic misfit in flow dynamics

Models asymmetry becoming time-dependent near Maxwell time

Abstract

The shear flow is modeled in terms of local structural rearrangements. Most of these rearrangements are strongly asymmetric, because the embedding matrix tends to be elastically adapted to the initial state and to have a marked elastic misfit with regard to the final state. As one approaches the Maxwell time, the asymmetry becomes time-dependent, thus enabling the system to leave the initial state. The model explains the Kohlrausch behavior at the main peak in terms of the interaction between different local structural rearrangements.