The perturbation of a turbulent boundary layer by a two-dimensional hill

dc.creatorFranklin, ED
dc.creatorAyek, GA
dc.date2013
dc.dateNOV
dc.date2014-07-30T18:59:59Z
dc.date2015-11-26T16:54:32Z
dc.date2014-07-30T18:59:59Z
dc.date2015-11-26T16:54:32Z
dc.date.accessioned2018-03-28T23:41:48Z
dc.date.available2018-03-28T23:41:48Z
dc.identifierJournal Of The Brazilian Society Of Mechanical Sciences And Engineering. Abcm Brazilian Soc Mechanical Sciences & Engineering, v. 35, n. 4, n. 337, n. 346, 2013.
dc.identifier1678-5878
dc.identifierWOS:000324128000001
dc.identifier10.1007/s40430-013-0024-z
dc.identifierhttp://www.repositorio.unicamp.br/jspui/handle/REPOSIP/72225
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/72225
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1276880
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionTurbulent boundary layers over flat walls in the presence of a hill are frequently found in nature and industry. Some examples are the airflows over hills and desert dunes, and also water flows over aquatic dunes inside closed conduits. The perturbation of a two-dimensional boundary layer by a hill introduces new scales in the problem, changing the way in which velocities and stresses are distributed along the flow. When in the presence of sediment transport, the stress distribution along the hill is strongly related to bed instabilities. This paper presents an experimental study on the perturbation of a fully developed turbulent boundary layer by a two-dimensional hill. Water flows were imposed over a hill fixed on the bottom wall of a closed conduit and the flow field was measured by particle image velocimetry. From the flow measurements, mean and fluctuation fields were computed. The general behaviors of velocities and stresses are compared to published asymptotic analyses and the surface shear stress is analyzed in terms of instabilities of a granular bed.
dc.description35
dc.description4
dc.description337
dc.description346
dc.descriptionPetrobras S.A. [0050.0045763.08.4]
dc.descriptionFAEPEX/UNICAMP [conv. 519.292, 1435/12]
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.descriptionPetrobras S.A. [0050.0045763.08.4]
dc.descriptionFAEPEX/UNICAMP [conv. 519.292, 1435/12]
dc.descriptionFAPESP [2012/19562-6]
dc.languageen
dc.publisherAbcm Brazilian Soc Mechanical Sciences & Engineering
dc.publisherRio De Janeiro Rj
dc.publisherBrasil
dc.relationJournal Of The Brazilian Society Of Mechanical Sciences And Engineering
dc.relationJ. Braz. Soc. Mech. Sci. Eng.
dc.rightsaberto
dc.sourceWeb of Science
dc.subjectTurbulent boundary layer
dc.subjectHill
dc.subjectPerturbation
dc.subjectInstabilities
dc.subjectSubaqueous Barchan Dunes
dc.subjectNonlinear Instabilities
dc.subjectLiquid Flow
dc.titleThe perturbation of a turbulent boundary layer by a two-dimensional hill
dc.typeArtículos de revistas


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