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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Fundamental investigation using active plasma control to reduce blade–vortex interaction noise:
Trushant K. Patel,Alexander J. Lilley,Weiqi Shen,Christian Porrello,Alexander Schindler-Tyka,Subrata Roy,William E. Lear,Steven A. E. Miller +7 more
TL;DR: In this article, a plasminar actuator strategically placed at the tip of the rotor blades can reduce the strength of the tip vortic vortex interaction noise, which is a problematic component of rotor noise.
Mechanisms of Submarine Debris Flow Growth
TL;DR: In this article , a new entrainment model is proposed for submarine debris flows with different clay contents, considering the relative contributions from basal grain friction and fluid viscous stresses that drive the entraining process, and the effects of hydroplaning.
Journal ArticleDOI
Interleukin-6–dependent epithelial fluidization initiates fibrotic lung remodeling
Ian T. Stancil,Jacob E. Michalski,Corinne E. Hennessy,Kristina L Hatakka,Ivana V. Yang,Jonathan S. Kurche,Mercedes Rincon,David A. Schwartz +7 more
TL;DR: Airway epithelial-fibroblast cocultures revealed that the fibrotic mesenchyme acts as a source of IL-6 family cytokines, which drive airway fluidization, andhibition of the IL- 6-SFK-YAP cascade was sufficient to prevent fluidization in both in vitro and ex vivo models.
Journal ArticleDOI
Chemically Tuning Attractive and Repulsive Interactions between Solubilizing Oil Droplets.
Ciera M. Wentworth,Alexander C. Castonguay,Pepijn G. Moerman,Caleb H. Meredith,Rebecca V. Balaj,Seong Ik Cheon,Lauren D. Zarzar +6 more
TL;DR: In this paper , the influence of oil chemical structure, nonionic surfactant structure, and surfactants concentration on the interfacial tensions and Marangoni flows of solubilizing oil-in-water drops is investigated.
References
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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.