PIVlab – Towards User-friendly, Affordable and Accurate Digital Particle Image Velocimetry in MATLAB
William Thielicke,Eize Stamhuis +1 more
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TLDR
The accuracy of several algorithms was determined and the best performing methods were implemented in a user-friendly open-source tool for performing DPIV flow analysis in Matlab.Abstract:
Digital particle image velocimetry (DPIV) is a non-intrusive analysis technique that is very popular for mapping flows quantitatively. To get accurate results, in particular in complex flow fields, a number of challenges have to be faced and solved: The quality of the flow measurements is affected by computational details such as image pre-conditioning, sub-pixel peak estimators, data validation procedures, interpolation algorithms and smoothing methods. The accuracy of several algorithms was determined and the best performing methods were implemented in a user-friendly open-source tool for performing DPIV flow analysis in Matlab.read more
Citations
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Journal ArticleDOI
Flow velocity and temperature sensing using thermosensitive fluorescent polymer seed particles in water
TL;DR: Particle image velocimetry (PIV) is an experimental technique that uses microscale particles as tracers to measure the velocity of a fluid flow as mentioned in this paper, which is an extension of PIV.
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Vortex flow evolution in a growing microdroplet during co-flow in coaxial capillaries
TL;DR: In this article, the authors used micro-particle image velocimetry (μPIV) to study the convective flow inside a silicone oil droplet during its formation in coaxial capillaries under co-flow in a water/glycerol mixture continuous phase.
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Comparison of oscillatory flow conditions in Newtonian and non-Newtonian fluids using PIV and high-speed image analysis
TL;DR: In this paper, an experimental investigation of oscillatory flow inside a vertical U-shaped circular pipe is presented to mimic the practical scenario takes place within a vertical oil well, where velocity distributions in Newtonian (deionized water) and non-Newtonian fluid (a mixture of three water-based polymeric liquids).
Journal ArticleDOI
The nature of cell division forces in epithelial monolayers.
Vivek K. Gupta,Sungmin Nam,Sungmin Nam,Sungmin Nam,Donghyun Yim,Jaclyn Camuglia,Judy Lisette Martin,Erin Sanders,Lucy Erin O'Brien,Adam C. Martin,Taeyoon Kim,Ovijit Chaudhuri +11 more
TL;DR: In this paper, the authors identify two distinct stages of division force generation that follow rounding: (1) Protrusive forces along the division axis that drive division elongation, and (2) outward forces that facilitate postdivision spreading.
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Probing the local response of a two-dimensional liquid foam
TL;DR: In this article, instead of flowing the foam around the obstacle, instead of moving the obstacle as an intruder inside the foam, the authors introduce a measuring geometry, new in this context, which makes it possible to independently control the driving velocity and the liquid foam properties, such as the gas fraction and polydispersity.
References
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Journal ArticleDOI
The Design and Implementation of FFTW3
Matteo Frigo,Steven G. Johnson +1 more
TL;DR: It is shown that such an approach can yield an implementation of the discrete Fourier transform that is competitive with hand-optimized libraries, and the software structure that makes the current FFTW3 version flexible and adaptive is described.
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
Particle-Imaging Techniques for Experimental Fluid Mechanics
TL;DR: A review of these methods can be found in articles by Lauterborn & Vogel (1984), Adrian (1986a), Hesselink (1988), and Dudderar et al..
Journal ArticleDOI
Adaptive histogram equalization and its variations
Stephen M. Pizer,Stephen M. Pizer,E. Philip Amburn,E. Philip Amburn,John D. Austin,Robert Cromartie,Ari Geselowitz,Ari Geselowitz,Trey Greer,Bart M. ter Haar Romeny,John B. Zimmerman,John B. Zimmerman +11 more
TL;DR: It is concluded that clipped ahe should become a method of choice in medical imaging and probably also in other areas of digital imaging, and that clip ahe can be made adequately fast to be routinely applied in the normal display sequence.
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.