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Particle-Imaging Techniques for Experimental Fluid Mechanics
An important achievement of modern experimental fluid mechanics is the invention and development of techniques for the measurement of whole, instantaneous fields of scalars and vectors. TheseExpand
Vortex organization in the outer region of the turbulent boundary layer
The structure of energy-containing turbulence in the outer region of a zero-pressure- gradient boundary layer has been studied using particle image velocimetry (PIV) to measure the instantaneousExpand
Hairpin vortex organization in wall turbulencea)
Coherent structures in wall turbulence transport momentum and provide a means of producing turbulent kinetic energy. Above the viscous wall layer, the hairpin vortex paradigm of Theodorsen coupledExpand
Mechanisms for generating coherent packets of hairpin vortices in channel flow
The evolution of a single hairpin vortex-like structure in the mean turbulent field of a low-Reynolds-number channel flow is studied by direct numerical simulation. The structure of the initialExpand
Theory of cross-correlation analysis of PIV images
To improve the performance of particle image velocimetry in measuring instantaneous velocity fields, direct cross-correlation of image fields can be used in place of auto-correlation methods ofExpand
Twenty years of particle image velocimetry
The development of the method of particle image velocimetry (PIV) is traced by describing some of the milestones that have enabled new and/or better measurements to be made. The current status of PIVExpand
Analysis and interpretation of instantaneous turbulent velocity fields
Abstract Methods of analyzing and interpreting velocity-field data (both two- and three-dimensional) to understand the kinematics, dynamics, and scales of turbulence are discussed. ReynoldsExpand
Spanwise structure and scale growth in turbulent boundary layers
Spanwise structure and growth mechanisms in a turbulent boundary layer are investigated experimentally. PIV measurements are obtained in the streamwise–spanwise ($x$–$z$)-plane from the buffer layerExpand
Very large-scale motion in the outer layer
Very large-scale motions in the form of long regions of streamwise velocity fluctuation are observed in the outer layer of fully developed turbulent pipe flow over a range of Reynolds numbers. TheExpand
Fully developed turbulent pipe flow: a comparison between direct numerical simulation and experiment
Direct numerical simulations (DNS) and experiments are carried out to study fully developed turbulent pipe flow at Reynolds number Re c ≈ 7000 based on centreline velocity and pipe diameter. TheExpand