Stress Controlled Rheology of Dense Suspensions Using Transient Flows.
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ID: 84346
2019
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Dense suspensions of hard particles in a Newtonian liquid can be jammed by shear when the applied stress exceeds a certain threshold. However, this jamming transition from a fluid into a solidified state cannot be probed with conventional steady-state rheology because the stress distribution inside the material cannot be controlled with sufficient precision. Here we introduce and validate a method that overcomes this obstacle. Rapidly propagating shear fronts are generated and used to establish well-controlled local stress conditions that sweep across the material. Exploiting such transient flows, we can track how a dense suspension approaches its shear-jammed state dynamically and quantitatively map out the onset stress for solidification in a state diagram.
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han2019stressphysical
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| Authors | Han, Endao;James, Nicole M;Jaeger, Heinrich M; |
| Journal | physical review letters |
| Year | 2019 |
| DOI | 10.1103/PhysRevLett.123.248002 |
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