Velocity distribution measurements in a fishway like open channel by Laser Doppler Anemometry LDAReport as inadecuate




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Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.ORCID iD: 0000-0002-4546-1607Lundström, Staffan Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.Andersson, Anders Luleå University of Technology, Department of Engineering Sciences and Mathematics, Fluid and Experimental Mechanics.Hellström, Gunnar 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, Presentation (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: 2017-05-29Bibliographically approved



Author: Bin Asad, S M Sayeed

Source: http://ltu.diva-portal.org/







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