Geometry dependence of the clogging transition in tilted hoppers

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dc.contributor.authorDurian, Douglas J.
dc.contributor.authorDurian, Douglas J.
dc.date2023-05-17T07:45:47.000
dc.date.accessioned2023-05-23T00:24:19Z
dc.date.available2023-05-23T00:24:19Z
dc.date.issued2013-05-03
dc.date.submitted2013-05-09T15:49:17-07:00
dc.description.abstractWe report the effects of system geometry on the clogging of granular material flowing out of flat-bottomed hoppers with variable aperture size D and with variable angle θ of tilt of the hopper away from horizontal. In general, larger tilt angles make the system more susceptible to clogging. To quantify this effect for a given θ, we measure the distribution of mass discharged between clogging events as a function of aperture size and extrapolate to the critical size at which the average mass diverges. By repeating for different angles, we map out a clogging phase diagram as a function of Dand θ that demarcates the regimes of free flow (large D, small θ) and clogging (small D, large θ). We do this for both circular holes and long rectangular slits. Additionally, we measure four types of grain: smooth spheres (glass beads), compact angular grains (beach sand), disklike grains (lentils), and rodlike grains (rice). For circular apertures, the clogging phase diagram is found to be the same for all grain types. For narrow slit apertures and compact grains, the shape is also the same as for circular holes when expressed in terms of projected area of the aperture against the average flow direction. For lentils and rice discharged from slits, the behavior differs and may be due to alignment between grain and slit axes.
dc.description.comments<p>Thomas, C. C., & Durian, D. J. (2013). Geometry dependence of the clogging transition in tilted hoppers. <em>Physical Review E, 87</em>(5), 052201. doi: <a href="http://dx.doi.org/10.1103/PhysRevE.87.052201">10.1103/PhysRevE.87.052201</a></p> <p>©2013 American Physical Society</p>
dc.identifier.urihttps://repository.upenn.edu/handle/20.500.14332/42985
dc.legacy.articleid1294
dc.legacy.fieldstrue
dc.legacy.fulltexturlhttps://repository.upenn.edu/cgi/viewcontent.cgi?article=1294&amp;context=physics_papers&amp;unstamped=1
dc.source.issue282
dc.source.journalDepartment of Physics Papers
dc.source.peerreviewedtrue
dc.source.statuspublished
dc.subject.otherPhysical Sciences and Mathematics
dc.subject.otherPhysics
dc.titleGeometry dependence of the clogging transition in tilted hoppers
dc.typeArticle
digcom.contributor.authorThomas, C. C
digcom.contributor.authorisAuthorOfPublication|email:djdurian@physics.upenn.edu|institution:University of Pennsylvania|Durian, Douglas J.
digcom.identifierphysics_papers/282
digcom.identifier.contextkey4122823
digcom.identifier.submissionpathphysics_papers/282
digcom.typearticle
dspace.entity.typePublication
relation.isAuthorOfPublication6f5cae6f-a436-4bc4-95d3-539ff48ce4a4
relation.isAuthorOfPublication.latestForDiscovery6f5cae6f-a436-4bc4-95d3-539ff48ce4a4
upenn.schoolDepartmentCenterDepartment of Physics Papers
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