000014000 001__ 14000
000014000 005__ 20161115094007.0
000014000 04107 $$aeng
000014000 046__ $$k2016-08-21
000014000 100__ $$aSuryanarayanan, Saikishan
000014000 24500 $$aSome insights on turbulent plane mixing layers from extensive vortex-gas computations

000014000 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014000 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014000 506__ $$arestricted
000014000 520__ $$2eng$$aWe examine the extent of relevance of extensive point-vortex-gas simulations (of Suryanarayanan et al, 2014) to real world turbulent mixing layers. The vortex gas is a singular, 2D, inviscid method used in the 70s and 80s to understand some aspects of turbulent flows, but has since been relegated to the status of a toy model. We challenge this view, by revisiting the vortex gas using modern high performance computing enabling simulations involving much larger number of vortices (upto 32000) than earlier studies and more crucially, large (upto 103) member ensemble averages. The present vortex-gas results are shown to be highly relevant to the large scale dynamics of free shear layers, particularly on the central and controversial issue of universality of self-similar states. The present analysis provides new insights on understanding data from other simulations that seemingly point to non-universal self-preservation behaviour.

000014000 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014000 653__ $$a

000014000 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014000 720__ $$aSuryanarayanan, Saikishan
000014000 8560_ $$ffischerc@itam.cas.cz
000014000 8564_ $$s193372$$uhttps://invenio.itam.cas.cz/record/14000/files/PO.FM14-1.18.181.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 1498, code PO.FM14-1.18.181).
000014000 962__ $$r13812
000014000 980__ $$aPAPER