000013994 001__ 13994
000013994 005__ 20161115094007.0
000013994 04107 $$aeng
000013994 046__ $$k2016-08-21
000013994 100__ $$aIwayama, Takahiro
000013994 24500 $$aSpectral dynamics in enstrophy inertial range in α- turbulence

000013994 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000013994 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000013994 506__ $$arestricted
000013994 520__ $$2eng$$aWe investigate spectral dynamics in the enstrophy inertial range in forced-dissipative turbulence for a generalized two-dimensional fluid system, the so-called α-turbulence, by the eddy damped quasi-normalized Markovianized (EDQNM) closure approximation equation for this system. As the non-local parameter α increases, the downward enstrophy flux dominates the net enstrophy flux and the triads responsible for the net enstrophy flux become more non-local. According to this analysis, we derive the transition of the exponent of the enstrophy spectrum at α = 2, which has been observed by previous direct numerical simulations, from an asymptotic analysis of EDQNM approximation equation. The energy transfer in the enstrophy inertial range is also investigated similarly.

000013994 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013994 653__ $$a

000013994 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000013994 720__ $$aIwayama, Takahiro
000013994 8560_ $$ffischerc@itam.cas.cz
000013994 8564_ $$s104707$$uhttps://invenio.itam.cas.cz/record/13994/files/PO.FM14-1.12.175.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 1487, code PO.FM14-1.12.175).
000013994 962__ $$r13812
000013994 980__ $$aPAPER