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Heaping, secondary flows and broken symmetry in flows of elongated granular particles

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Tartalom: http://dx.doi.org/10.1039/c4sm02534b
Archívum: MTA Könyvtár
Gyűjtemény: Status = Published

Type = Article
Cím:
Heaping, secondary flows and broken symmetry in flows of elongated granular particles
Létrehozó:
Wortel, Geert
Börzsönyi, Tamás
Somfai, Ellák
Wegner, Sandra
Szabó, Balázs
Stannarius, Ralf
van Hecke, Martin
Dátum:
2015-02-09
Téma:
QC01 Mechanics / mechanika
Tartalmi leírás:
In this paper we report experiments where we shear granular rods in split-bottom geometries, and find that a significant heap of height of least 40% of the filling height can form at the particle surface. We show that heaping is caused by a significant secondary flow, absent for spherical particles. Flow reversal transiently reverses the secondary flow, leading to a quick collapse and slower regeneration of the heap. We present a symmetry argument and experimental data that show that the generation of the secondary flow is driven by a misalignment of the mean particle orientation with the streamlines of the flow. This general mechanism is expected to be important in all flows of sufficiently anisometric grains.
Típus:
Article
PeerReviewed
Formátum:
text
Azonosító:
Wortel, Geert and Börzsönyi, Tamás and Somfai, Ellák and Wegner, Sandra and Szabó, Balázs and Stannarius, Ralf and van Hecke, Martin (2015) Heaping, secondary flows and broken symmetry in flows of elongated granular particles. Soft Matter, 11. pp. 2570-2576. ISSN 1744-683X
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