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dc.contributor.authorDuda, Daniel
dc.contributor.authorBém, Jindřich
dc.contributor.authorYanovych, Vitalii
dc.contributor.authorPavlíček, Petr
dc.contributor.authorUruba, Václav
dc.date.accessioned2021-03-01T11:00:20Z-
dc.date.available2021-03-01T11:00:20Z-
dc.date.issued2020
dc.identifier.citationDUDA, D., BÉM, J., YANOVYCH, V., PAVLÍČEK, P., URUBA, V. Secondary flow of second kind in a short channel observed by PIV. European Journal of Mechanics - B/Fluids, 2020, roč. 79, č. January - February 2020, s. 444-453. ISSN 0997-7546.cs
dc.identifier.issn0997-7546
dc.identifier.uri2-s2.0-85074360691
dc.identifier.urihttp://hdl.handle.net/11025/42745
dc.format9 s.cs
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.publisherElsevieren
dc.relation.ispartofseriesEuropean Journal of Mechanics - B/Fluidsen
dc.rightsPlný text není přístupný.cs
dc.rights© Elsevieren
dc.titleSecondary flow of second kind in a short channel observed by PIVen
dc.typepreprintcs
dc.typepreprinten
dc.rights.accessclosedAccessen
dc.type.versiondraften
dc.description.abstract-translatedBy using the Stereo Particle Image Velocimetry (PIV) technique we observe the secondary flow of second kind in a corner of a channel of square cross-section. The boundary layer thickness is much lower than the channel size. Therefore, the flow is still developing, not filling the entire channel cross-section, which is the case more widely reported in literature studied in a very long channel. The non-linear secondary effects of interacting boundary layers are observed as a single stream-wise vortex close to the channel corner in case of laminar boundary layers. In the case of turbulent boundary layers, the secondary flow takes shape of a symmetric pair of counter-rotating vortices. This pattern is observable only in the average velocity field, while the instantaneous ones display large amount of vortices, whose spatial distribution close to the corner in dependence on their orientation leads to statistically emergent net vorticity. At the same time, this pattern is reproduced by using a numerical simulation.en
dc.subject.translatedParticle image velocimetry secondary flow secondary flow of second kind Vortex Boundary layer Transition to turbulence Anisotropyen
dc.identifier.doi10.1016/j.euromechflu.2019.10.005
dc.identifier.document-number503315100038
dc.identifier.obd43928445
dc.project.IDEF16_026/0008389/LoStr: Výzkumná spolupráce pro dosažení vyšší účinnosti a spolehlivosti lopatkových strojůcs
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