Three Dimensional Flow of Colloidal Glasses

Farage, T. F. F.; Brader, J. M.

doi:10.48550/arxiv.1109.0552

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several theoretical approaches addressing the mechanical responses of glassy systems are noteworthy, including the soft glassy rheology model [22], the shear-transformationzone theory [23], and the mode-coupling theory [24][25][26]. In Ref.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Mechanical responses and stress fluctuations of a supercooled liquid in a sheared non-equilibrium state

Mizuno

Yamamoto

2012

Eur. Phys. J. E

View full text Add to dashboard Cite

Abstract.A steady shear flow can drive supercooled liquids into a non-equilibrium state. Using molecular dynamics simulations under steady shear flow superimposed with oscillatory shear strain for a probe, non-equilibrium mechanical responses are studied for a model supercooled liquid composed of binary soft spheres. We found that even in the strongly sheared situation, the supercooled liquid exhibits surprisingly isotropic responses to oscillating shear strains applied in three different components of the strain tensor. Based on this isotropic feature, we successfully constructed a simple two-mode Maxwell model that can capture the key features of the storage and loss moduli, even for highly non-equilibrium state. Furthermore, we examined the correlation functions of the shear stress fluctuations, which also exhibit isotropic relaxation behaviors in the sheared non-equilibrium situation. In contrast to the isotropic features, the supercooled liquid additionally demonstrates anisotropies in both its responses and its correlations to the shear stress fluctuations. Using the constitutive equation (a two-mode Maxwell model), we demonstrated that the anisotropic responses are caused by the coupling between the oscillating strain and the driving shear flow. Due to these anisotropic responses and fluctuations, the violation of the fluctuation-dissipation theorem (FDT) is distinct for different components. We measured the magnitude of this violation in terms of the effective temperature. It was demonstrated that the effective temperature is notably different between different components, which indicates that a simple scalar mapping, such as the concept of an effective temperature, oversimplifies the true nature of supercooled liquids under shear flow. An understanding of the mechanism of isotropies and anisotropies in the responses and fluctuations will lead to a better appreciation of these violations of the FDT, as well as certain consequent modifications to the concept of an effective temperature.

show abstract

Section: Introductionmentioning

confidence: 99%

“…In Ref. [26], the superposition rheology of glassy materials was investigated using the mode-coupling theory. Furthermore, in the field of complex fluid rheology, several experimental studies have examined the mechanical properties of polymer solutions under a steady shear flow [27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Mechanical responses and stress fluctuations of a supercooled liquid in a sheared non-equilibrium state

Mizuno

Yamamoto

2012

Eur. Phys. J. E

View full text Add to dashboard Cite

show abstract

Three Dimensional Flow of Colloidal Glasses

Cited by 1 publication

References 0 publications

Mechanical responses and stress fluctuations of a supercooled liquid in a sheared non-equilibrium state

Mechanical responses and stress fluctuations of a supercooled liquid in a sheared non-equilibrium state

Contact Info

Product

Resources

About