Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The Numerical Study of Open Channel Junctions with Extreme Confluence Angles for Surface Flow Without Wall Roughness
College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing, China.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0003-0820-617X
2019 (English)In: E-proceedings of the 38th IAHR World Congress, International Association for Hydro-Enviroment Engineering and Research (IAHR) , 2019, p. 3620-3626Conference paper, Published paper (Refereed)
Abstract [en]

Confluences exist not only in nature, like in streams or rivers but also constructed environment like the structures for sewage and urban rainfall drainage canals. In the natural environment, two tributaries join at an angle from 30° to 135°. Existing related research focuses on tributary angels within this mentioned range. However, in the constructed environment, channel junctions with its angle beyond this range may occur. Hydrodynamic data from a 90-degree flume confluence is taken from experiments, available in the literature. The information is used to build a numerical model on Delft 3D. The similar flow parameters are used, with the comparable cross-sectional dimensions, with three confluence geometries. Firstly, two confluences with a junction-angle of 0°, and then with an angle of 180° are studied, each with three flow cases. Free slip condition is supplied to elude the effect of wall roughness on flow behavior. Interesting results have been found and presented. It is noticed that geometries affect the location of vertical velocity and velocity distribution in the confluence area. The 180° confluence shows a big stagnation zone in the angled tributary. This study improves the understanding of the interaction between flow dynamics and confluence angles better.

Place, publisher, year, edition, pages
International Association for Hydro-Enviroment Engineering and Research (IAHR) , 2019. p. 3620-3626
Series
Proceedings of the IAHR World Congress, ISSN 2521-7119, E-ISSN 2521-716X
Keywords [en]
Confluence, Extreme angle, Delft 3D, Hydraulic modeling, Surface flow patterns
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-76408DOI: 10.3850/38WC092019-0589Scopus ID: 2-s2.0-85167781459OAI: oai:DiVA.org:ltu-76408DiVA, id: diva2:1361548
Conference
38th IAHR World Congress, 1-6 September, 2019, Panama City, Panama
Available from: 2019-10-16 Created: 2019-10-16 Last updated: 2024-03-07Bibliographically approved

Open Access in DiVA

fulltext(1463 kB)3188 downloads
File information
File name FULLTEXT01.pdfFile size 1463 kBChecksum SHA-512
679817e56d7dda45a5a132a59c85a87be5687a075354979376b0037a83c1fbc51094cf2bd4a048b84c3114acefeee4a58c4adadde6db68ffe3f466544ff07f3b
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records

Xie, Qiancheng

Search in DiVA

By author/editor
Xie, Qiancheng
By organisation
Fluid and Experimental Mechanics
Fluid Mechanics and Acoustics

Search outside of DiVA

GoogleGoogle Scholar
Total: 3188 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 105 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf