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Article: Interaction between dry granular flow and rigid barrier with basal clearance: analytical and physical modelling

TitleInteraction between dry granular flow and rigid barrier with basal clearance: analytical and physical modelling
Authors
Keywordsbasal clearance
dry granular flow
rigid barrier
flume modelling
Issue Date2020
PublisherNRC Research Press. The Journal's web site is located at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cgj
Citation
Canadian Geotechnical Journal, 2020, v. 57 n. 2, p. 236-245 How to Cite?
AbstractSome types of barriers are designed with a clearance between the bottom of the barrier and the channel bed. This feature allows small discharges to pass, thereby reducing the maintenance required over the service life of the barrier. Aside from the practical function of a clearance, it influences the impact force, jump height, and discharge. In this paper, a series of physical experiments was conducted using a 6 m long flume to model the interaction between dry granular flow and rigid barrier with a basal clearance. The ratio between the clearance and particle diameter Hc/D was varied from 0 to 10. The channel inclination was varied from 15° to 35° to achieve different Froude numbers before impact. A new impact model for predicting impact force exerted on the barrier with a basal clearance is presented and evaluated. Results reveal that Hc ≥ 3D is capable of reducing the impact force and overflow. Findings from this study highlight the importance of considering the effects of basal clearance on the design of multiple-barrier systems.
Persistent Identifierhttp://hdl.handle.net/10722/284243
ISSN
2019 Impact Factor: 2.802
2015 SCImago Journal Rankings: 2.093

 

DC FieldValueLanguage
dc.contributor.authorChoi, CE-
dc.contributor.authorNg, CWW-
dc.contributor.authorLiu, H-
dc.contributor.authorWang, Y-
dc.date.accessioned2020-07-20T05:57:11Z-
dc.date.available2020-07-20T05:57:11Z-
dc.date.issued2020-
dc.identifier.citationCanadian Geotechnical Journal, 2020, v. 57 n. 2, p. 236-245-
dc.identifier.issn0008-3674-
dc.identifier.urihttp://hdl.handle.net/10722/284243-
dc.description.abstractSome types of barriers are designed with a clearance between the bottom of the barrier and the channel bed. This feature allows small discharges to pass, thereby reducing the maintenance required over the service life of the barrier. Aside from the practical function of a clearance, it influences the impact force, jump height, and discharge. In this paper, a series of physical experiments was conducted using a 6 m long flume to model the interaction between dry granular flow and rigid barrier with a basal clearance. The ratio between the clearance and particle diameter Hc/D was varied from 0 to 10. The channel inclination was varied from 15° to 35° to achieve different Froude numbers before impact. A new impact model for predicting impact force exerted on the barrier with a basal clearance is presented and evaluated. Results reveal that Hc ≥ 3D is capable of reducing the impact force and overflow. Findings from this study highlight the importance of considering the effects of basal clearance on the design of multiple-barrier systems.-
dc.languageeng-
dc.publisherNRC Research Press. The Journal's web site is located at http://pubs.nrc-cnrc.gc.ca/cgi-bin/rp/rp2_desc_e?cgj-
dc.relation.ispartofCanadian Geotechnical Journal-
dc.rightsCanadian Geotechnical Journal. Copyright © NRC Research Press.-
dc.subjectbasal clearance-
dc.subjectdry granular flow-
dc.subjectrigid barrier-
dc.subjectflume modelling-
dc.titleInteraction between dry granular flow and rigid barrier with basal clearance: analytical and physical modelling-
dc.typeArticle-
dc.identifier.emailChoi, CE: cechoi@hku.hk-
dc.identifier.authorityChoi, CE=rp02576-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1139/cgj-2018-0622-
dc.identifier.scopuseid_2-s2.0-85078541145-
dc.identifier.hkuros311030-
dc.identifier.volume57-
dc.identifier.issue2-
dc.identifier.spage236-
dc.identifier.epage245-
dc.publisher.placeCanada-

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