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Enhancement of structural rearrangement in glassy systems under shear flow

F. Corberi·G. Gonnella·D. Suppa
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Abstract

We extend the analysis of the mean field schematic model recently introduced for the description of glass forming liquids to the case of a supercooled fluid subjected to a shear flow of rate $γ$. After quenching the system to a low temperature $T$, a slow glassy regime is observed before stationarity is achieved at the characteristic time $τ_g$. $τ_g$ is of the order of the usual equilibration time without shear $τ_g^o$ for weak shear, $γτ_g ^o<1$. For larger shear, $γτ_g ^o>1$, local rearrangement of dense regions is instead enhanced by the flow, and $τ_g \simeq 1/(Tγ)$.

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F. Corberi, G. Gonnella, D. Suppa. 2001-02-21. Enhancement of structural rearrangement in glassy systems under shear flow. https://doi.org/10.1209/epl%2Fi2000-00441-9

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