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
Investigating supercritical flow characteristics and movement of sediment particles in a narrow channel bend using PTV and video footage
Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, 7491 Trondheim, Norway; Chair of Hydraulic Engineering, Technical University of Munich, Arcisstr. 21, 80333 Munich, Germany.ORCID iD: 0000-0002-9134-3222
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-4916-9566
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics. Vattenfall AB, R&D Hydraulic Laboratory, 81470 Älvkarleby, Sweden.
Chair of Hydraulic Engineering, Technical University of Munich, Arcisstr. 21, 80333 Munich, Germany.ORCID iD: 0000-0002-7667-5966
Show others and affiliations
2024 (English)In: Advances in Water Resources, ISSN 0309-1708, E-ISSN 1872-9657, Vol. 193, article id 104827Article in journal (Refereed) Published
Abstract [en]

This experimental study investigates the cause of nonuniform invert abrasion observed at sediment bypass tunnel (SBT) bends by examining the variations in velocity distributions, turbulence properties, bed shear stress, and bulk sediment movements under three supercritical bend flow conditions, detailed investigation of such flow is scarce. Using a laboratory-scaled model (1:22) of the downstream bend at Solis SBT, Switzerland, the research utilized particle tracking velocimetry and high-speed cameras with spherical sandstones and glass spheres representing sediments. The results indicate that as the secondary currents develop in the flow direction, the flow properties and sediments redistribute across the channel: the high-momentum fluids are directed toward the outer wall, the bed shear stress increases toward the outer wall, and the sediments are pushed toward the inner wall, which then follow this path downstream, even in straight sections, despite lower bed shear stress. This distribution of sediments, driven by secondary currents, leads to deeper invert abrasions toward the inner wall at SBT bends and downstream sections. Thus, these abrasions are primarily influenced by sediment movement rather than the bed shear stress alone. The study's findings are also valuable for validating future numerical simulations.

Place, publisher, year, edition, pages
Elsevier, 2024. Vol. 193, article id 104827
Keywords [en]
Bed shear stress, Particle tracking velocimetry, Secondary currents, Sediment bypass tunnel, Sediment movement and invert abrasion, Supercritical bend flow
National Category
Mechanical Engineering
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-110293DOI: 10.1016/j.advwatres.2024.104827ISI: 001333038800001Scopus ID: 2-s2.0-85205904494OAI: oai:DiVA.org:ltu-110293DiVA, id: diva2:1904320
Note

Validerad;2024;Nivå 2;2024-10-09 (sarsun);

Full text license: CC BY 4.0;

Funder: HydroCen (Project No 90148311); NTNU (Project No 81772024);

Available from: 2024-10-09 Created: 2024-10-09 Last updated: 2024-11-20Bibliographically approved

Open Access in DiVA

fulltext(17683 kB)34 downloads
File information
File name FULLTEXT01.pdfFile size 17683 kBChecksum SHA-512
a1589c0bd2e8bde5557431e0fde6eee89022d1239410c3bf15280935f1844ba26c2a49bda42a1229e96e817e0bf0960d1e0f16f40a534092b18fcdadbfd28c3a
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopus

Authority records

Larsson, I.A. SofiaBillstein, Mats

Search in DiVA

By author/editor
Kadia, SubhojitLarsson, I.A. SofiaBillstein, MatsRüther, NilsPummer, Elena
By organisation
Fluid and Experimental Mechanics
In the same journal
Advances in Water Resources
Mechanical Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 34 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: 94 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