000014960 001__ 14960
000014960 005__ 20161115100207.0
000014960 04107 $$aeng
000014960 046__ $$k2016-08-21
000014960 100__ $$aLu, Jianzhou
000014960 24500 $$aSpatio-temporal evolution of isolated turbulent bands in channel flows

000014960 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014960 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014960 506__ $$arestricted
000014960 520__ $$2eng$$aWe introduce an experimental set-up that enables us to create two dimensional shear flow with zero mean advection velocity. We investigate a plane Couette-Poiseuille configuration, completing the first experimental results for this flow which had only been studied theoretically to-date ([5]). Using flow visualizations we characterize subcritical transition to turbulence and we show the existence of turbulent spots in plane Couette-Poiseuille flow. Due to zero mean advection velocity of the base profile, these turbulent structures are nearly stationary (despite a non-zero pressure gradient in streamwise direction). We ascertain two characteristic wavenumbers correspond to two different inner regions of the base flow. We also determine the evolution of streamwise and spanwise dimensions of turbulent spot as a function of Reynolds number.

000014960 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014960 653__ $$a

000014960 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014960 720__ $$aLu, Jianzhou
000014960 8560_ $$ffischerc@itam.cas.cz
000014960 8564_ $$s124376$$uhttps://invenio.itam.cas.cz/record/14960/files/TS.MS01-3.02.pdf$$yOriginal version of the author's contribution as presented on CD,  page 64, code TS.MS01-3.02
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000014960 962__ $$r13812
000014960 980__ $$aPAPER