000013837 001__ 13837
000013837 005__ 20161115094003.0
000013837 04107 $$aeng
000013837 046__ $$k2016-08-21
000013837 100__ $$aChimetta, Henrique
000013837 24500 $$aExperiments on a closed-conduit flow perturbed by a two- dimensional hill of low aspect ratio

000013837 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000013837 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000013837 506__ $$arestricted
000013837 520__ $$2eng$$aWe present here some preliminary results of an experimental study on the perturbation of a fully developed turbulent boundary layer by a two-dimensional hill of low aspect ratio. Water flows were imposed over an asymmetric hill, with a relatively small curvature, fixed on the bottom wall of a closed conduit. Particle image velocimetry (PIV) was used to measure the flow fields. For the flow upstream of the hill, we found some usual characteristics of a turbulent channel flow, such as logarithmic regions and typical profiles of the xy component of the Reynolds stress. Over the ripple, the maximum of the vertical component of the mean velocity is restrict to a narrow band, above the ripple surface, for every longitudinal position toward the crest. We also found the region where the Reynolds stress is perturbed, and the turbulent kinetic energy production was computed.

000013837 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013837 653__ $$a

000013837 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000013837 720__ $$aChimetta, Henrique
000013837 8560_ $$ffischerc@itam.cas.cz
000013837 8564_ $$s117002$$uhttps://invenio.itam.cas.cz/record/13837/files/PO.FM02-1.04.70.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 558, code PO.FM02-1.04.70).
000013837 962__ $$r13812
000013837 980__ $$aPAPER