Low-Reynolds-number turbulent boundary layers
نویسندگان
چکیده
منابع مشابه
Organised motions in turbulent boundary layers over a wide range of Reynolds number
The motivation behind this paper comes from the large-scale coherence that has been recently reported in the near-wall and logarithmic regions of wall-bounded turbulent flows. Associated with these are inclined vortical structures that populate the near-wall region. Most often these inclined structures have been inferred as hairpin shaped vortices that have been observed experimentally and evid...
متن کاملObtaining accurate mean velocity measurements in high Reynolds number turbulent boundary layers using Pitot tubes
S. C. C. Bailey1,†, M. Hultmark2, J. P. Monty3, P. H. Alfredsson4, M. S. Chong3, R. D. Duncan5, J. H. M. Fransson4, N. Hutchins3, I. Marusic3, B. J. McKeon6, H. M. Nagib5, R. Örlü4, A. Segalini4,7, A. J. Smits2 and R. Vinuesa5 1Department of Mechanical Engineering, University of Kentucky, Lexington, KY 40506, USA 2Deparment of Mechanical and Aerospace Engineering, Princeton University, Princeto...
متن کاملMultiscale geometry and scaling of the turbulent-nonturbulent interface in high Reynolds number boundary layers.
The scaling and surface area properties of the wrinkled surface separating turbulent from nonturbulent regions in open shear flows are important to our understanding of entrainment mechanisms at the boundaries of turbulent flows. Particle image velocimetry data from high Reynolds number turbulent boundary layers covering three decades in scale are used to resolve the turbulent-nonturbulent inte...
متن کاملNear-wall Influence of Large-scale Motions in High Reynolds Number Turbulent Boundary Layers
A spanwise array of surface hot-film shear-stress sensors and a traversing hot-wire located directly above one of these sensors are used to examine the relationship between skin-friction fluctuations and the velocity fluctuations in the boundary layer. Experiments are performed in a high Reynolds number turbulent boundary layer at Reθ ≈ 39000. The shear-stress data indicate the presence of larg...
متن کاملObservations on High Reynolds Number Turbulent Boundary Layer Measurements
An experimental study that examines spatial resolution effects on the measured streamwise velocity component is presented. Normal hot-wire measurements for mean flow velocity profiles, streamwise turbulence intensity profiles in addition to their respective spectra at different levels within the turbulent boundary layers will be presented. Measurements were carried out at Reynolds number based ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Fluid Mechanics
سال: 1991
ISSN: 0022-1120,1469-7645
DOI: 10.1017/s0022112091000691