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Velocity distribution measurements in a fishway like open channel by Laser Doppler Anemometry (LDA)
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-4546-1607
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-1033-0244
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-8360-9051
2016 (English)In: / [ed] Dancova, P; Vesely, M, 2016Conference paper, Oral presentation only (Refereed)
Abstract [en]

Experiments in an open channel flume with placing a vertical half cylinder barrier have been performed in order to investigate how the upstream velocity profiles are affected by a barrier. An experimental technique using Laser Doppler Velocimetry (LDV) was adopted to measure these velocity distributions in the channel for four different discharge rates. Velocity profiles were measured very close to wall and at 25, 50 and 100 mm upstream of the cylinder wall. For comparing these profiles with well-known logarithmic velocity profiles, velocity profiles were also measured in smooth open channel flow for all same four discharge rates. The results indicate that regaining the logarithmic velocity profiles upstream of the half cylindrical barrier occurs at 100 mm upstream of the cylinder wall.

Place, publisher, year, edition, pages
2016.
Series
EPJ Web of Conferences, E-ISSN 2100-014X ; 115
National Category
Fluid Mechanics and Acoustics
Research subject
Fluid Mechanics
Identifiers
URN: urn:nbn:se:ltu:diva-35793DOI: 10.1051/epjconf/201611402005ISI: 000400395300007Local ID: a77bee17-bbb6-484b-9f73-9a98bfddcfdeOAI: oai:DiVA.org:ltu-35793DiVA: diva2:1009047
Conference
Experimental Fluid Mechanics : 17/11/2015 - 20/11/2015
Note

Godkänd; 2015; 20151120 (sayasa)

Available from: 2016-09-30 Created: 2016-09-30 Last updated: 2017-10-19Bibliographically approved

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Bin Asad, S M SayeedLundström, StaffanAndersson, AndersHellström, Gunnar
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