000014696 001__ 14696
000014696 005__ 20161115100159.0
000014696 04107 $$aeng
000014696 046__ $$k2016-08-21
000014696 100__ $$aHidema, Ruri
000014696 24500 $$aVortex Deformation on Two-dimensional Turbulence Affected by Polymers (INVITED)

000014696 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014696 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014696 506__ $$arestricted
000014696 520__ $$2eng$$aA drag reduction effect has been a long-standing issue. In order to consider the background mechanism of the drag reduction effect, we focus on vortex deformation in turbulence and extensional rheological properties of the fluids in this study. A flowing soap film as a two-dimensional flow was adopted to avoid shear stress effects. Vortex generation in a 2D flow was visualized and how the vortices deformed by polymer additives were analysed. Power spectra of the visualized 2D turbulence through interference patterns and velocity fluctuation obtained by a PIV analysis revealed the variation of energy transfer in 2D flow. A wavelet analysis was used to detect the variation of vortices in time. We considered how these variations were affected by a relaxation time of sample solution, and by several extensional rates added on the flow.

000014696 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014696 653__ $$a

000014696 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014696 720__ $$aHidema, Ruri
000014696 8560_ $$ffischerc@itam.cas.cz
000014696 8564_ $$s219229$$uhttps://invenio.itam.cas.cz/record/14696/files/TS.FM12-5.01.pdf$$yOriginal version of the author's contribution as presented on CD,  page 1300, code TS.FM12-5.01
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000014696 962__ $$r13812
000014696 980__ $$aPAPER