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- W2599268470 abstract "This thesis deals with the description of flow and arrest of granular matter.Granular matter can undergo a rigidity transition — called jamming — that ismainly controlled by the applied stresses and the packing fraction of the grainsthat constitute the medium. In addition to stress and packing fraction, interparticle friction greatly affects the rheology of granular matter. Using numericalsimulations and analytical modeling, we show how novel behavior in dense flowand jamming regimes arises in the presence of friction. In particular, frictionlessjamming is continuous with a critical point at zero stress. In contrast, frictionaljamming is shown to exhibit a discontinuous phase transition with a critical pointat finite stress. The fact that the critical point resides at finite stress gives rise toremarkable flow behavior, called reentrant flow. Explicitly, there is an interval ofpacking fractions above the critical packing fraction in which large or low stressleads to flow but intermediate stress jams the medium. The behavior close tojamming depends substantially on the system size, i.e., there is a critical system size above which unsteady flow emerges. Unsteady flow is rationalized bylarge-scale structures in the stress fields. Both, the large-scale structures andthe accompanied unsteady flow, are novel phenomena regarding the flow of drygranular matter and can be attributed to interparticle friction." @default.
- W2599268470 created "2017-04-07" @default.
- W2599268470 creator A5076791861 @default.
- W2599268470 date "2016-08-19" @default.
- W2599268470 modified "2023-09-23" @default.
- W2599268470 title "Rheology of frictional grains" @default.
- W2599268470 hasPublicationYear "2016" @default.
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