000014427 001__ 14427
000014427 005__ 20161115100151.0
000014427 04107 $$aeng
000014427 046__ $$k2016-08-21
000014427 100__ $$aDiaz Daniel, Carlos
000014427 24500 $$aA conceptual model for the filtered wall-shear stress statistics in turbulent boundary layers

000014427 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014427 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014427 506__ $$arestricted
000014427 520__ $$2eng$$aWe present near-wall results from zero-pressure gradient boundary layer DNS, at Reynolds numbers up to Reθ = 2000 based on momentum thickness θ and free-stream velocity U ∞ . Statistics and probability distributions of fluctuating skin friction suggest increasing standard deviation and higher moments with increasing Reθ . An algebraic correlation for wall dissipation is proposed, fitting current and previous data. The wall-shear stress angle appears correlated with the streamwise vortex structures which are responsible for rare negative shear stress events. A conceptual model is presented, relating statistics of filtered skin friction fluctuations with velocity structure function in δν ! y ! δ (δν and δ are wall viscous length and boundary layer thickness). According to the model, the fluctuating shear stress influences velocity spectra in the Townsend-Perry attached-eddy range 1/δ < k < 1/y, inducing a higher slope than the classical result E(k) ∝ k−1 .

000014427 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014427 653__ $$a

000014427 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014427 720__ $$aDiaz Daniel, Carlos
000014427 8560_ $$ffischerc@itam.cas.cz
000014427 8564_ $$s154727$$uhttps://invenio.itam.cas.cz/record/14427/files/TS.FM02-1.05.pdf$$yOriginal version of the author's contribution as presented on CD,  page 488, code TS.FM02-1.05
.
000014427 962__ $$r13812
000014427 980__ $$aPAPER