Journal ArticleDOI
Twenty years of particle image velocimetry
TLDR
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.Abstract:
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 PIV is summarized, and some goals for future advances are addressed.read more
Citations
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Journal Article
High Speed PIV of Breaking Waves on Both Sides of the Air-Water Interface
TL;DR: In this article, small-scale, steep breaking waves forced by shoaling the waves up a ten degree slope to a level plateau were generated by a computer controlled, paddle-type wave maker at one end of a small acrylic tank.
Journal ArticleDOI
Hypersonic N2 boundary layer flow velocity profile measurements using FLEET.
Jonathan L. Hill,Paul S. Hsu,Naibo Jiang,Stephen W. Grib,Sukesh Roy,Matthew P. Borg,Levi Thomas,Mark F. Reeder,Stephen A. Schumaker +8 more
TL;DR: The potential of utilizing FLEET velocimetry for understanding the dynamics of laminar and turbulent boundary layers in hypersonic flows is demonstrated.
Proceedings ArticleDOI
Digital image correlation for small strain measurement in deformable solids and geomechanical structures
TL;DR: A novel approach in which color images are employed to enhance the performance of DIC, and the results show that Color DIC performs significantly better than grayscale DIC for measurement of small strains by a factor of 2.
Journal ArticleDOI
Crossed patterned structured illumination for the analysis and velocimetry of transient turbid media
TL;DR: A method for achieving snapshot visualizations using structured illumination, where the spatial frequency domain is increased by a factor of two compared to past structured illumination snapshots, and, for the first time, is used to extract velocity vectors in 2D in a transient turbid medium, in this case an optically dense atomizing spray.
Journal ArticleDOI
Single and Multiphase Flow Characterization by Means of an Optical Fiber Bragg Grating Grid
Carlos R. Zamarreño,Cicero Martelli,Virginia Baroncini,Eduardo Nunes dos Santos,Marco Jose da Silva,Rigoberto E. M. Morales,Pablo Zubiate,Francisco J. Arregui,Ignacio R. Matias +8 more
TL;DR: In this paper, the optical fiber Bragg gratings (FBGs) arranged in a grid pattern were used to detect turbulences or air bubbles within the pipe by means of an adequate aggregation and processing of the response of the FBGs at each crossing point, with a total of 64 crossings (12 crossings are out of the cylindrical shape pipe).
References
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Book
Particle Image Velocimetry: A Practical Guide
TL;DR: In this paper, the authors present a practical guide for the planning, performance and understanding of experiments employing the PIV technique, which is primarily intended for engineers, scientists and students, who already have some basic knowledge of fluid mechanics and nonintrusive optical measurement techniques.
Journal ArticleDOI
Digital Particle Image Velocimetry
Christian Willert,Morteza Gharib +1 more
TL;DR: In this article, the directional ambiguity associated with PIV and LSV is resolved by implementing local spatial cross-correlations between two sequential single-exposed particle images, and the recovered velocity data are used to compute the spatial and temporal vorticity distribution and the circulation of the vortex ring.
Book ChapterDOI
Particle Image Velocimetry
TL;DR: In this paper, the authors use hot-wire (HW) or laser velocimetry (LV) to estimate the velocity, vorticity, and pressure fields of wake flows.
Journal ArticleDOI
Determination of displacements using an improved digital correlation method
TL;DR: An improved digital correlation method is presented for obtaining the full-field in-plane deformations of an object by numerically correlating a selected subset from the digitized intensity pattern of the undeformed object.
Journal ArticleDOI
Fundamentals of digital particle image velocimetry
TL;DR: In this paper, the measurement principle of digital particle image velocimetry (PIV) is described in terms of linear system theory and conditions for PIV correlation analysis as a valid interrogation method are determined.