Bifurcating Transport of Glassy Matter Within Annular Micropores

TL;DR

This paper develops an analytical model to study the shear-thinning transport behavior of glassy materials in annular micropores, accounting for surface roughness effects at small scales.

Contribution

It introduces a rate-dependent shear-thinning model combined with boundary perturbation to analytically analyze glassy matter transport in rough micropores.

Findings

Transport results obtained up to second order

Surface roughness significantly influences flow behavior

Shear-thinning effects are captured in the analytical model

Abstract

Glassy matter, as subjected to high shear rates, exhibit shear thinning : i.e., the viscosity diminishes with increasing shear rate. Meanwhile one prominent difference between the transport in micropores and that in macroscale is the (relatively) larger roughness observed inside micropores. As the pore size decreases, the surface-to-volume ratio increases and therefore, surface roughness will greatly affect the transport in micropores. By treating the glass as a shear-thinning matter and using the rate-dependent model together with the boundary perturbation method, we can analytically obtain the transport results up to the second order.