Journal ArticleDOI
Turbulent boundary layer at low Reynolds number
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TLDR
The results of an experimental investigation of a turbulent boundary layer with zero-pressure gradient directed toward extending the data base at low Reynolds numbers are presented in this article, where the data obtained are concerned primarily with mean velocity distributions, skin-friction coefficients, and distributions of intensity of the longitudinal component of the turbulent velocity fluctuations for Reynolds numbers based on momentum thickness as low as 465.Abstract:
The results of an experimental investigation of a turbulent boundary layer with zero‐pressure gradient directed toward extending the data base at low Reynolds numbers are presented. The data obtained are concerned primarily with mean‐velocity distributions, skin‐friction coefficients, and distributions of intensity of the longitudinal‐component of the turbulent‐velocity fluctuations for Reynolds numbers based on momentum thickness as low as 465. The validity, at low Reynolds numbers, of the semi‐empirical laws characterizing the inner and outer regions of the boundary layer is examined.read more
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Journal ArticleDOI
On the evolution of a turbulent boundary layer induced by a three-dimensional roughness element
TL;DR: In this paper, an experimental investigation is described which has as its objectives the extension of the technical data base pertaining to roughness-induced transition and the advancement of the understanding of the physical processes by which three-dimensional roughness elements induce transition from laminar to turbulent flow in boundary layers.
Journal ArticleDOI
Similarity Analysis for Turbulent Boundary Layer with Pressure Gradient: Outer Flow
TL;DR: In this article, the equilibrium-type similarity analysis of George and Castillo for the outer part of zero pressure gradient boundary layers has been extended to include boundary layers with pressure gradient, and the constancy of a single new pressure gradient parameter is all that is necessary to characterize these new equilibrium turbulent boundary layers.
Journal ArticleDOI
Transitional and turbulent boundary layer with heat transfer
Xiaohua Wu,Parviz Moin +1 more
TL;DR: In this article, a simulation of an incompressible, nominally zero-pressure-gradient flat-plate boundary layer from momentum thickness Reynolds number 80−1950 is presented, where the ratio of Stanton number and skin-friction coefficient deviates from the exact Reynolds analogy value of 0.5 by less than 1.5%.
Journal ArticleDOI
On accurately measuring statistics associated with small-scale structure in turbulent boundary layers using hot-wire probes
Joseph Klewicki,R. E. Falco +1 more
TL;DR: In this paper, the authors performed a thorough investigation of statistical convergence for a variety of fluctuating quantities and found that the maximum value of u′/uτ increases with increasing Reynolds number over the given Rθ range (u′ ≡ r.m.s.
Journal ArticleDOI
Effects of imperfect spatial resolution on measurements of wall-bounded turbulentbx shear flows
TL;DR: In this paper, the effects of imperfect spatial resolution on hot-film and hot-wire measurements of wall-bounded turbulent shear flows were studied, and the effect of the number of events detected with the variable-interval time-averaging (VITA) technique was found to depend strongly on the sensor length.