000014728 001__ 14728 000014728 005__ 20161115100200.0 000014728 04107 $$aeng 000014728 046__ $$k2016-08-21 000014728 100__ $$aBuxton, Oliver 000014728 24500 $$aConcurrent scale interactions in a turbulent shear flow 000014728 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers 000014728 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016 000014728 506__ $$arestricted 000014728 520__ $$2eng$$aThe interaction between concurrent large-scale velocity fluctuations and small-scale velocity and velocity-gradient fluctuations is examined with both experimental and complementary DNS data. It is shown that both the sign and the magnitude of the large-scale velocity fluctuation affect this scale interaction, as does the definition of the “modulating” large scales, with a distinct peak interaction length-scale identified. The results are explained via a “convective” mechanism whereby high activity small-scale fluctuations are transported from the centre-line of the shear flow by the large-scale velocity fluctuations. 000014728 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb. 000014728 653__ $$a 000014728 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016 000014728 720__ $$aBuxton, Oliver 000014728 8560_ $$ffischerc@itam.cas.cz 000014728 8564_ $$s94539$$uhttps://invenio.itam.cas.cz/record/14728/files/TS.FM14-2.03.pdf$$yOriginal version of the author's contribution as presented on CD, page 1409, code TS.FM14-2.03 . 000014728 962__ $$r13812 000014728 980__ $$aPAPER