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dc.contributor.author
Willibald, Carolin
dc.contributor.author
Löwe, Henning
dc.contributor.author
Theile, Thiemo
dc.contributor.author
Dual, Jürg
dc.contributor.author
Schneebeli, Martin
dc.date.accessioned
2020-10-13T12:04:08Z
dc.date.available
2020-09-09T03:02:30Z
dc.date.available
2020-09-09T12:24:04Z
dc.date.available
2020-10-13T12:04:08Z
dc.date.issued
2020-08
dc.identifier.issn
0022-1430
dc.identifier.issn
1727-5652
dc.identifier.other
10.1017/jog.2020.36
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/439162
dc.identifier.doi
10.3929/ethz-b-000439162
dc.description.abstract
Snow appears as a granular material in most engineering applications. We examined the role of grain shape and cohesion in angle of repose experiments, which are a common means for the characterization of granular materials. The role of shape was examined by investigating diverse snow types with discernable shape and spherical ice beads. Two geometrical shape parameters were calculated from X-ray micro-computed-tomography images after a particle segmentation was performed with a watershed algorithm. Cohesion was examined by conducting experiments at six different temperatures between -40 and -2 degrees C, assuming sintering as its cause, which accelerates with increasing temperature. As a cohesionless reference, experiments with glass beads were performed. We found that both shape and cohesion exerted about equally strong influence on the angle of repose. We utilized our results for an empirical model that describes the influence of shape and cohesion as additive corrections of the angle of repose of cohesionless spheres and explains all experiments with a correlation coefficientr(2)= 0.95. With temperature and the chosen shape parameter as fitting variables, previous experiments with another snow type could be consistently included. The experiments highlight the relevance of these parameters in granular snow mechanics and can be used for model calibration.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
International Glaciological Society
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Snow mechanics
en_US
dc.subject
snow microstructure
en_US
dc.subject
snow rheology
en_US
dc.title
Angle of repose experiments with snow: role of grain shape and cohesion
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-05-27
ethz.journal.title
Journal of Glaciology
ethz.journal.volume
66
en_US
ethz.journal.issue
258
en_US
ethz.journal.abbreviated
J Glaciol
ethz.pages.start
658
en_US
ethz.pages.end
666
en_US
ethz.size
9 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.publication.place
Cambridge
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02618 - Institut für Mechanische Systeme / Institute of Mechanical Systems::03307 - Dual, Jürg (emeritus) / Dual, Jürg (emeritus)
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02130 - Dep. Maschinenbau und Verfahrenstechnik / Dep. of Mechanical and Process Eng.::02618 - Institut für Mechanische Systeme / Institute of Mechanical Systems::03307 - Dual, Jürg (emeritus) / Dual, Jürg (emeritus)
ethz.date.deposited
2020-09-09T03:02:51Z
ethz.source
WOS
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-09-09T12:24:15Z
ethz.rosetta.lastUpdated
2022-03-29T03:19:57Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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