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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Quenching active swarms: effects of light exposure on collective motility in swarming Serratia marcescens.
TL;DR: The immobilization and quenching of these collective flows when the moving swarm is exposed to intense wide-spectrum light with a substantial ultraviolet component and a minimal Brownian dynamics model is proposed to examine the escape of exposed bacteria from the region of exposure.
Journal ArticleDOI
Microdroplet nucleation by dissolution of a multicomponent drop in a host liquid
Huanshu Tan,Christian Diddens,Ali Akash Mohammed,Junyi Li,Michel Versluis,Xuehua Zhang,Detlef Lohse +6 more
TL;DR: In this paper, a one-dimensional multiphase and multicomponent diffusion model in combination with thermodynamic equilibrium theory is proposed to predict the behavior of spontaneous emulsification, that is triggered by diffusion.
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Velocity refinement of PIV using global optical flow
TL;DR: In this paper, the authors proposed a method to enhance the particle image velocimetry (PIV) velocity resolution using global optical flow along with image warping, which is used to compensate the intensity changes of PIV image pairs.
Journal ArticleDOI
Interactions of the wakes of two flapping wings in hover
Journal ArticleDOI
Patient-Specific 3D Bioprinted Models of Developing Human Heart
Alexander Cetnar,Martin L. Tomov,Martin L. Tomov,Liqun Ning,Liqun Ning,Bowen Jing,Andrea S. Theus,Andrea S. Theus,Akaash Kumar,Amanda N. Wijntjes,Sai Raviteja Bhamidipati,Katherine Pham Do,Athanasios Mantalaris,John N. Oshinski,John N. Oshinski,Reza Avazmohammadi,Brooks D. Lindsey,Brooks D. Lindsey,Holly Bauser-Heaton,Vahid Serpooshan,Vahid Serpooshan +20 more
TL;DR: This study introduces the first generation of anatomically accurate, 3D functional models of developing human heart, which enables precise tuning of microenvironmental factors, such as flow and geometry, thus allowing the study of normal developmental processes and underlying diseases.
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.