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Effect of bed elevation discordance in the main river on the confluence hydrodynamics in 90o straight-channels’ confluences
dc.contributor | Schleiss, Anton J. | |
dc.contributor | de Cesare, Giovanni | |
dc.contributor | Franca, Mario J. | |
dc.contributor | Pfister, Michael | |
dc.creator | Đorđević, Dejana | |
dc.date.accessioned | 2020-03-10T10:51:36Z | |
dc.date.available | 2020-03-10T10:51:36Z | |
dc.date.issued | 2014 | |
dc.identifier.isbn | 978-1-138-02674-2 | |
dc.identifier.isbn | 978-1-4987-0442-7 | |
dc.identifier.uri | https://grafar.grf.bg.ac.rs/handle/123456789/1858 | |
dc.description.abstract | A role of the difference in bed elevations in the main-river (ΔzMR) at its entrance to a 90º straight-channels' confluence is studied numerically using a 3D finite-volume model. Three characteristic hydrological scenarios with DR = {0.250, 0.583, 0.750} are analysed in four confluence layouts having ΔzMR / hd [0.0, 0.50] (where hd stands for the flow depth in the deeper canal at the confluence). It is found that: 1) a portion of the tribu-tary flow in the bottom layers is entrained by the bed-step, 2) the w- velocity has the same order of magnitude as Vxy for ΔzMR ≥ 0.25hd and DR > 0.5, 3) the opposite bank is endangered by erosion due to strong upward motion along this bank, 4) additional shear layer develops on the outer side of the distorted umax-core and 5) the presence of bed-step favours bed-load transport both in and far downstream of the confluence. | en |
dc.language.iso | en | sr |
dc.publisher | CRC Press, Taylor & Francis Group | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/37009/RS// | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/Technological Development (TD or TR)/37010/RS// | sr |
dc.rights | openAccess | sr |
dc.source | River Flow 2014, Proceedings of the International Conference on Fluvial Hydraulics, Lausanne, Switzerland, 3-5 September 2014 | sr |
dc.subject | river confluence | sr |
dc.subject | bed elevation discordance in the main river | sr |
dc.subject | flow angles δ and φ | sr |
dc.subject | size of the recirculation zone | sr |
dc.subject | shear layer | sr |
dc.subject | bed shear stress distribution | sr |
dc.title | Effect of bed elevation discordance in the main river on the confluence hydrodynamics in 90o straight-channels’ confluences | en |
dc.type | conferenceObject | sr |
dc.rights.license | ARR | sr |
dc.rights.holder | Taylor & Francis Group | sr |
dc.citation.epage | 1005 | |
dc.citation.spage | 997 | |
dc.identifier.doi | 10.1201/b17133 | |
dc.identifier.fulltext | https://grafar.grf.bg.ac.rs/bitstream/id/7128/FrontCover&TOC-River-Flow-2014.pdf | |
dc.identifier.fulltext | https://grafar.grf.bg.ac.rs/bitstream/id/7129/River-Flow-2014-Paper124.pdf | |
dc.type.version | publishedVersion | sr |