000014726 001__ 14726 000014726 005__ 20161115100200.0 000014726 04107 $$aeng 000014726 046__ $$k2016-08-21 000014726 100__ $$aLalescu, Cristian 000014726 24500 $$aCharacterizing multi-scale interaction in turbulence 000014726 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers 000014726 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016 000014726 506__ $$arestricted 000014726 520__ $$2eng$$aIn fully developed turbulence, interactions take place between structures spanning a broad range of length and time scales. In m, we aim to characterize these multi-scale interactions quantitatively. To this end, we identify the time scales relevant for structures of a given size, both from an Eulerian and a Lagrangian perspective. By employing filtering techniques in space and time, we compare turbulent velocity fields containing length scales above a given cutoff-scale with time-filtered fields. Varying the filter widths and times yields a precise picture of the various interactions. In a second step, we generalize the analysis to the Lagrangian frame to study the impact of large- and small-scale fluctuations on turbulent particle transport. 000014726 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb. 000014726 653__ $$a 000014726 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016 000014726 720__ $$aLalescu, Cristian 000014726 8560_ $$ffischerc@itam.cas.cz 000014726 8564_ $$s198954$$uhttps://invenio.itam.cas.cz/record/14726/files/TS.FM14-2.01.pdf$$yOriginal version of the author's contribution as presented on CD, page 1405, code TS.FM14-2.01 . 000014726 962__ $$r13812 000014726 980__ $$aPAPER