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Titel: High-speed X-ray tomography of silo discharge
Autor(en): Stannarius, Ralf
Sancho Martinez, Diego
Börzsönyi, Tamás
Bieberle, Martina
Barthel, Frank
Hampel, Uwe
Erscheinungsdatum: 2019
Art: Artikel
Sprache: Englisch
URN: urn:nbn:de:gbv:ma9:1-1981185920-370477
Schlagwörter: Granular materials
Ultrafast x-ray computed tomography
Silo discharge
Zusammenfassung: The outflow of granular materials from storage containers with narrow outlets is studied by means of ultrafast x-ray computed tomography (UFXCT). The used acquisition speed of this tomograph is high enough to allow high-speed recording of two horizontal cross sections (each of them at a rate of 1000 images per second) of the container during the discharge of material. Analyzing space-time plots that were generated from the tomograms, we retrieve velocity profiles and packing structures in the container.Wecompare hard spherical grains with soft, low-friction hydrogel spheres. Their flow profiles are qualitatively different. While the hard spheres form stagnant zones at the container side walls, the hydrogel spheres with extremely low friction coefficient flow in all regions of the container. Moreover, a shell-like positional arrangement of the soft spheres induced by the container walls is revealed. The results obtained for the flow field structure confirm earlier conclusions drawn from sequences of x-ray tomograms of clogged states.
URI: https://opendata.uni-halle.de//handle/1981185920/37047
http://dx.doi.org/10.25673/36815
Open-Access: Open-Access-Publikation
Nutzungslizenz: (CC BY 4.0) Creative Commons Namensnennung 4.0 International(CC BY 4.0) Creative Commons Namensnennung 4.0 International
Sponsor/Geldgeber: DFG-Publikationsfonds 2019
Journal Titel: New journal of physics
Verlag: Dt. Physikalische Ges.
Verlagsort: [Bad Honnef]
Band: 21
Heft: 2019
Originalveröffentlichung: 10.1088/1367-2630/ab5893
Seitenanfang: 1
Seitenende: 13
Enthalten in den Sammlungen:Fakultät für Naturwissenschaften (OA)

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