Difference between revisions of "Spatial cooperativity in soft glassy flows"
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[[Image:dilatant_2.jpg |right| |200px| |thumb| Figure 2.]] | [[Image:dilatant_2.jpg |right| |200px| |thumb| Figure 2.]] | ||
| − | A general feature of glassy materials is a strong nonlinear flow rule relating stress and strain. This feature is no well-documented and poorly understood. Many have tried to understand the glass transition by studying the dynamical heterogeneities in glass-forming materials, but Using a local velocity measurement technique, the authors | + | A general feature of glassy materials is a strong nonlinear flow rule relating stress and strain. This feature is no well-documented and poorly understood. Many have tried to understand the glass transition by studying the dynamical heterogeneities in glass-forming materials, but how these heterogeneities affect flow remains unclear. Using a local velocity measurement technique, the authors study the local flow of a film of confined glassy material. |
| + | |||
| + | The authors test flow in two main geometries: shear planar flow in a wide gap Couette cell, and pressure driven planar flow | ||
Revision as of 04:13, 6 December 2009
Reference
Goyon, J., Colin, A., Ovarlez, G., Ajdari, A., Bocquet, L., Nature 454 (2008).
Keywords
spatial cooperativity, glass, velocity profile, shear stress, shear strain, Couette cell
Summary
A general feature of glassy materials is a strong nonlinear flow rule relating stress and strain. This feature is no well-documented and poorly understood. Many have tried to understand the glass transition by studying the dynamical heterogeneities in glass-forming materials, but how these heterogeneities affect flow remains unclear. Using a local velocity measurement technique, the authors study the local flow of a film of confined glassy material.
The authors test flow in two main geometries: shear planar flow in a wide gap Couette cell, and pressure driven planar flow
