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Article: Nonlinear mechanism of bed load transport

TitleNonlinear mechanism of bed load transport
Authors
KeywordsDynamic mechanical analysis
Open channel flow
Sediment transport
Issue Date2009
PublisherTianjin University. The Journal's web site is located at http://tjdy.chinajournal.net.cn/
Citation
Transactions Of Tianjin University, 2009, v. 15 n. 2, p. 126-129 How to Cite?
Abstract
From the group movement of the bed load within the bottom layer, details of the nonlinear dynamic characteristics of bed load movement are discussed in this paper. Whether the sediment is initiated into motion corresponds to whether the constant term in the equation is equal to zero. If constant term is zero and no dispersive force is considered, the equation represents the traditional Shields initiation curve, and if constant term is zero without the dispersive force being considered, then a new Shields curve which is much lower than the traditional one is got. The fixed point of the equation corresponds to the equilibrium sediment transport of bed load. In the mutation analysis, we have found that the inflection point is the demarcation point of breaking. In theory, the breaking point corresponds to the dividing boundary line, across which the bed form changes from flat bed to sand ripple or sand dune. Compared with the experimental data of Chatou Hydraulic Lab in France, the conclusions are verified. © Tianjin University and Springer-Verlag 2009.
Persistent Identifierhttp://hdl.handle.net/10722/59007
ISSN
2013 SCImago Journal Rankings: 0.260
References

 

Author Affiliations
  1. The University of Hong Kong
  2. Tianjin University
DC FieldValueLanguage
dc.contributor.authorXu, Hen_HK
dc.contributor.authorBai, Yen_HK
dc.contributor.authorNg, COen_HK
dc.date.accessioned2010-05-31T03:41:18Z-
dc.date.available2010-05-31T03:41:18Z-
dc.date.issued2009en_HK
dc.identifier.citationTransactions Of Tianjin University, 2009, v. 15 n. 2, p. 126-129en_HK
dc.identifier.issn1006-4982en_HK
dc.identifier.urihttp://hdl.handle.net/10722/59007-
dc.description.abstractFrom the group movement of the bed load within the bottom layer, details of the nonlinear dynamic characteristics of bed load movement are discussed in this paper. Whether the sediment is initiated into motion corresponds to whether the constant term in the equation is equal to zero. If constant term is zero and no dispersive force is considered, the equation represents the traditional Shields initiation curve, and if constant term is zero without the dispersive force being considered, then a new Shields curve which is much lower than the traditional one is got. The fixed point of the equation corresponds to the equilibrium sediment transport of bed load. In the mutation analysis, we have found that the inflection point is the demarcation point of breaking. In theory, the breaking point corresponds to the dividing boundary line, across which the bed form changes from flat bed to sand ripple or sand dune. Compared with the experimental data of Chatou Hydraulic Lab in France, the conclusions are verified. © Tianjin University and Springer-Verlag 2009.en_HK
dc.languageengen_HK
dc.publisherTianjin University. The Journal's web site is located at http://tjdy.chinajournal.net.cn/en_HK
dc.relation.ispartofTransactions of Tianjin Universityen_HK
dc.subjectDynamic mechanical analysisen_HK
dc.subjectOpen channel flowen_HK
dc.subjectSediment transporten_HK
dc.titleNonlinear mechanism of bed load transporten_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1006-4982&volume=15&issue=2&spage=126–129&epage=&date=2009&atitle=Nonlinear+mechanism+of+bed+load+transporten_HK
dc.identifier.emailNg, CO:cong@hku.hken_HK
dc.identifier.authorityNg, CO=rp00224en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s12209-009-0022-5en_HK
dc.identifier.scopuseid_2-s2.0-65749116614en_HK
dc.identifier.hkuros158241en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-65749116614&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume15en_HK
dc.identifier.issue2en_HK
dc.identifier.spage126en_HK
dc.identifier.epage129en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridXu, H=15027924000en_HK
dc.identifier.scopusauthoridBai, Y=7402572067en_HK
dc.identifier.scopusauthoridNg, CO=7401705594en_HK
dc.identifier.citeulike4540714-

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