Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/74474
DC Field | Value | Language |
---|---|---|
dc.contributor | Department of Civil and Environmental Engineering | - |
dc.creator | Jing, L | - |
dc.creator | Kwok, CY | - |
dc.creator | Leung, YF | - |
dc.creator | Sobral, YD | - |
dc.date.accessioned | 2018-03-29T07:16:54Z | - |
dc.date.available | 2018-03-29T07:16:54Z | - |
dc.identifier.issn | 2101-6275 | - |
dc.identifier.uri | http://hdl.handle.net/10397/74474 | - |
dc.description | 8th International Conference on Micromechanics on Granular Media, Powders and Grains 2017, 3 - 7 July 2017 | en_US |
dc.language.iso | en | en_US |
dc.publisher | EDP Sciences | en_US |
dc.rights | © The Authors, published by EDP Sciences. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/). | en_US |
dc.title | Effect of geometric base roughness on size segregation | en_US |
dc.type | Conference Paper | en_US |
dc.identifier.spage | 1 | - |
dc.identifier.epage | 4 | - |
dc.identifier.volume | 140 | - |
dc.identifier.doi | 10.1051/epjconf/201714003056 | - |
dcterms.abstract | The geometric roughness at boundaries has a profound impact on the dynamics of granular flows. For a bumpy base made of fixed particles, two major factors have been separately studied in the literature, namely, the size and spatial distribution of base particles. A recent work (Jing et al. 2016) has proposed a roughness indicator Ra, which combines both factors for any arbitrary bumpy base comprising equally-sized spheres. It is shown in mono-disperse flows that as Ra increases, a transition occurs from slip (Ra <MergeCell 0.51) to non-slip (Ra >MergeCell 0.62) conditions. This work focuses on such a phase transition in bi-disperse flows, in which Ra can be a function of time. As size segregation takes place, large particles migrate away from the bottom, leading to a variation of size ratio between flow- and base-particles. As a result, base roughness Ra evolves with the progress of segregation. Consistent with the slip/non-slip transition in mono-disperse flows, basal sliding arises at low values of Ra and the development of segregation might be affectedMergeCell when Ra increases to a certain level (Ra >MergeCell 0.62), non-slip condition is respected. This work extends the validity of Ra to bi-disperse flows, which can be used to understand the geometric boundary effect during segregation. | - |
dcterms.accessRights | open access | en_US |
dcterms.bibliographicCitation | EPJ web of conferences, 2017, v. 140, 03056, p. 1-4 | - |
dcterms.isPartOf | EPJ web of conferences | - |
dcterms.issued | 2017 | - |
dc.identifier.scopus | 2-s2.0-85024129417 | - |
dc.relation.conference | International Conference on Micromechanics on Granular Media, Powders and Grains | - |
dc.identifier.artn | 03056 | - |
dc.identifier.rosgroupid | 2017005624 | - |
dc.description.ros | 2017-2018 > Academic research: refereed > Refereed conference paper | - |
dc.description.validate | 201802 bcrc | - |
dc.description.oa | Version of Record | en_US |
dc.identifier.FolderNumber | OA_IR/PIRA | en_US |
dc.description.pubStatus | Published | en_US |
Appears in Collections: | Conference Paper |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
epjconf162384.pdf | 1.52 MB | Adobe PDF | View/Open |
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