File Download
  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Characterization of base roughness for granular chute flows

TitleCharacterization of base roughness for granular chute flows
Authors
Issue Date2016
PublisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/pre/
Citation
Physical Review E: covering statistical, nonlinear, biological, and soft matter physics, 2016, v. 94 n. 5, article no. 052901 How to Cite?
AbstractBase roughness plays an important role in the dynamics of granular flows but is still poorly understood due to the difficulty of its quantification. For a bumpy base made of spheres, at least two factors should be considered in order to characterize its geometric roughness, namely, the size ratio of flow to base particles and the packing arrangement of base particles. In this paper, we propose an alternative definition of base roughness, Ra, as a function of both the size ratio and the distribution of base particles. This definition is generalized for random and regular packings of multilayered spheres. The range of possible values of Ra is presented, and optimal arrangements for maximizing base roughness are studied. Our definition is applied to granular chute flows in both two- and three-dimensional configurations, and is shown to successfully predict whether slip occurs at the base. A transition is observed from slip to nonslip conditions as Ra increases. Critical values of Ra are identified for the construction of a nonslip base at various angles of inclination.
Persistent Identifierhttp://hdl.handle.net/10722/249625
ISSN
2019 Impact Factor: 2.296
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorJING, L-
dc.contributor.authorKwok, CY-
dc.date.accessioned2017-11-21T03:04:48Z-
dc.date.available2017-11-21T03:04:48Z-
dc.date.issued2016-
dc.identifier.citationPhysical Review E: covering statistical, nonlinear, biological, and soft matter physics, 2016, v. 94 n. 5, article no. 052901-
dc.identifier.issn2470-0045-
dc.identifier.urihttp://hdl.handle.net/10722/249625-
dc.description.abstractBase roughness plays an important role in the dynamics of granular flows but is still poorly understood due to the difficulty of its quantification. For a bumpy base made of spheres, at least two factors should be considered in order to characterize its geometric roughness, namely, the size ratio of flow to base particles and the packing arrangement of base particles. In this paper, we propose an alternative definition of base roughness, Ra, as a function of both the size ratio and the distribution of base particles. This definition is generalized for random and regular packings of multilayered spheres. The range of possible values of Ra is presented, and optimal arrangements for maximizing base roughness are studied. Our definition is applied to granular chute flows in both two- and three-dimensional configurations, and is shown to successfully predict whether slip occurs at the base. A transition is observed from slip to nonslip conditions as Ra increases. Critical values of Ra are identified for the construction of a nonslip base at various angles of inclination.-
dc.languageeng-
dc.publisherAmerican Physical Society. The Journal's web site is located at http://journals.aps.org/pre/-
dc.relation.ispartofPhysical Review E: covering statistical, nonlinear, biological, and soft matter physics-
dc.rightsCopyright 2016 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevE.94.052901-
dc.titleCharacterization of base roughness for granular chute flows-
dc.typeArticle-
dc.identifier.emailKwok, CY: fkwok8@hku.hk-
dc.identifier.authorityKwok, CY=rp01344-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.1103/PhysRevE.94.052901-
dc.identifier.hkuros283395-
dc.identifier.volume94-
dc.identifier.issue5-
dc.identifier.spagearticle no. 052901-
dc.identifier.epagearticle no. 052901-
dc.identifier.isiWOS:000386775900008-
dc.publisher.placeUnited States-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats