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arXiv · 1404.3481

Nonequilibrium Thermodynamics of the Soft Glassy Rheology Model

Ingo Fuereder·Patrick Ilg
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Abstract

The Soft Glassy Rheology (SGR) model is a mesoscopic framework which proved to be very successful in describing flow and deformation of various amorphous materials phenomenologically (e.g. pastes, slurries, foams etc). In this paper, we cast SGR in a general, model independent framework for nonequilibrium thermodynamics called General Equation for the Nonequilibrium Reversible-Irreversible Coupling (GENERIC). This leads to a new formulation of SGR which clarifies how it can properly be coupled to hydrodynamic fields, resulting in a thermodynamically consistent, local, continuum version of SGR. Additionally, we find that compliance with thermodynamics imposes the existence of a modification to the stress tensor as predicted by SGR.

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Ingo Fuereder, Patrick Ilg. 2014-04-14. Nonequilibrium Thermodynamics of the Soft Glassy Rheology Model. https://doi.org/10.1103/physreve.88.042134

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