Rheological response of a glass-forming liquid having large bidispersity

Abstract

Using extensive numerical simulations, we investigate the flow behaviour of a model glass-forming binary mixture whose constituent particles have a large size ratio. The rheological response to applied shear is studied in the regime where the larger species are spatially predominant. We demonstrate that the macroscopic rigidity that emerges with increasing density occurs in the regime where the larger species undergo a glass transition while the smaller species continue to be highly diffusive. We analyse the interplay between the timescale imposed by the shear and the quiescent relaxation dynamics of the two species to provide a microscopic insight into the observed rheological response. Finally, by tuning the composition of the mixture, we illustrate that the systematic insertion of the smaller particles affects the rheology by lowering of viscosity of the system.

9 pages, 7 figures

References in corpus (9)

• Unified study of glass and jamming rheology in soft particle systems
• Three-dimensional imaging of colloidal glasses under steady shear
• Relaxation Scenarios in a Mixture of Large and Small Spheres: Dependence on the Size Disparity
• Anomalous Dynamic Arrest in a Mixture of Big and Small Particles
• Yielding of binary colloidal glasses
• Heterogeneous dynamics during yielding of glasses: effect of aging
• Effects of polydispersity on the glass transition dynamics of aqueous suspensions of soft spherical colloidal particles
• Dynamic heterogeneities and non-Gaussian behavior in two-dimensional randomly confined colloidal fluids
• Flow heterogeneities in supercooled liquids and glasses under shear

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• Finite-size effects in the diffusion dynamics of a glass-forming binary mixture with large size ratio