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 ArticleDOI
Exploring the optimal experimental setup for surface flow velocity measurements using PTV.
TL;DR: The particle tracking velocimetry (PTV) algorithm can be used to describe the dynamics of surface flow velocity in both space and time using fixed cameras or unmanned aerial systems (UASs), and analyses allowed exploration of the optimal particle seeding density and frame rate in different configurations.
Journal ArticleDOI
High-resolution velocimetry from tracer particle fields using a wavelet-based optical flow method
TL;DR: A wavelet-based optical flow method for high-resolution velocimetry based on tracer particle images is presented in this article, which is designed for improvements in processing experimental images by implementing wavelet transforms with the lifting method and symmetric boundary conditions.
Journal ArticleDOI
Three-dimensional effects in laminar flow past a confined cylinder
TL;DR: In this paper, an experimental and numerical study on the Newtonian fluid flow around a confined cylinder placed in a rectangular duct was undertaken in order to assess three-dimensional effects on the flow patterns.
Journal ArticleDOI
Ice dices for monitoring stream surface velocity
TL;DR: In this paper, the trajectories of a few grams of artificially deployed ice dices are reconstructed by analyzing thermal images with particle tracking velocimetry, and the average surface flow velocities are in agreement with benchmark values estimated with a current meter.
Journal ArticleDOI
Flow past a single stationary sphere, 1. Experimental and numerical techniques
Shashank S. Tiwari,Eshita Pal,Shivkumar Bale,Nitin Minocha,Ashwin W. Patwardhan,Krishnaswamy Nandakumar,Jyeshtharaj B. Joshi,Jyeshtharaj B. Joshi +7 more
TL;DR: A large number of computational and experimental studies have been performed in the last several decades which have enabled the understanding and hence helped in distinguishing the flow regimes based on the characteristics exhibited by different flow parameters as mentioned in this paper.
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.