Please use this identifier to cite or link to this item:
DC FieldValueLanguage
dc.contributor.authorFranca, Mário J.-
dc.contributor.authorFerreira, Rui M. L.-
dc.contributor.authorLemmin, Ulrich-
dc.identifier.citationAdvances in Water Resources. 31:6 (2008) 915-925en_US
dc.description.abstractThe logarithmic layer of double-averaged (in time and space) streamwise velocity profiles obtained from field measurements made in the Swiss rivers, Venoge and Chamberonne is parameterized and discussed. Velocity measurements were made using a 3D Acoustic Doppler Velocity Profiler. Both riverbeds are hydraulically rough, composed of coarse gravel, with relative submergences (h/D50) of 5.25 and 5.96, respectively. From the observations, the flow may be divided into three different layers: a roughness layer near the bed, an equivalent logarithmic layer and a surface or outer layer. It was found that a logarithmic law can describe the double-averaged profiles in the layer 0.30 < z/h < 0.75. The parameterization of the logarithmic law is discussed. Special emphasis is given to the geometric parameters roughness and zero-displacement heights and to the equivalent von Karman constant.en_US
dc.subjectDouble-averaged velocity profilesen_US
dc.subjectLogarithmic lawen_US
dc.subjectVelocity field measurementsen_US
dc.titleParameterization of the logarithmic layer of double-averaged streamwise velocity profiles in gravel-bed river flowsen_US
item.fulltextCom Texto completo-
item.grantfulltextopen- - Marine and Environmental Sciences Centre-
Appears in Collections:FCTUC Eng.Civil - Artigos em Revistas Internacionais
Files in This Item:
File Description SizeFormat
filee74793c29fcc45918c1955dd9c454523.pdf933.63 kBAdobe PDFView/Open
Show simple item record

Page view(s)

checked on Oct 20, 2020

Download(s) 20

checked on Oct 20, 2020

Google ScholarTM


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.