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- W4308482802 abstract "Studies of granular materials, both theoretical and experimental, are often restricted to convex grain shapes. We demonstrate that a nonconvex grain shape can lead to a qualitatively novel macroscopic dynamics. Spatial crosses (hexapods) are continuously sheared in a split-bottom container. Thereby, they develop a secondary flow profile that is completely opposite to that of rod-shaped or lentil-shaped convex grains in the same geometry. The crosses at the surface migrate towards the rotation center and sink there mimicking a ``reverse Weissenberg effect.'' The observed surface flow field suggests the existence of a radial outward flow in the depth of the granular bed, thus, forming a convection cell. This flow field is connected with a dimple formed in the rotation center. The effect is strongly dependent on the particle geometry and the height of the granular bed." @default.
- W4308482802 created "2022-11-12" @default.
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- W4308482802 date "2022-11-03" @default.
- W4308482802 modified "2023-09-24" @default.
- W4308482802 title "Secondary flow in ensembles of nonconvex granular particles under shear" @default.
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- W4308482802 doi "https://doi.org/10.1103/physreve.106.l052901" @default.
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- W4308482802 hasPublicationYear "2022" @default.
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