000013848 001__ 13848
000013848 005__ 20161115094003.0
000013848 04107 $$aeng
000013848 046__ $$k2016-08-21
000013848 100__ $$aZhang, Chi
000013848 24500 $$aReynolds-number universality of quasi-steady quasi-homogeneous theory

000013848 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000013848 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000013848 506__ $$arestricted
000013848 520__ $$2eng$$aA rigorous formal statement of the hypothesis of quasi-steady and quasi-homogeneous (QSQH) nature of the scale interaction in the near-wall part of a turbulent boundary layer is proposed. This makes the corresponding derivations easier. Multi-objective optimisation is applied to determine the cut-offs for the large-scale filter, which gave better results than the filters based on the known suggestions for the cut-offs. Comparisons for a set of statistical characteristics obtained from the databases of direct numerical simulations of a plane channel flow were performed. It was observed that the accuracy of the predictions based on the QSQH hypothesis improve as the Reynolds number increases. The next step will be testing extrapolation from medium to high Reynolds numbers based on the QSQH approach.

000013848 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013848 653__ $$a

000013848 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000013848 720__ $$aZhang, Chi
000013848 8560_ $$ffischerc@itam.cas.cz
000013848 8564_ $$s146972$$uhttps://invenio.itam.cas.cz/record/13848/files/PO.FM02-1.15.81.pdf$$yOriginal version of the author's contribution as presented on CD, XMLout( page 579, code PO.FM02-1.15.81).
000013848 962__ $$r13812
000013848 980__ $$aPAPER