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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Theory of cross-correlation analysis of PIV images : Image analysis as measuring technique in flows
R. D. Keane,R. J. Adrian +1 more
TL;DR: In this article, cross-correlation methods of interrogation of successive single-exposure frames can be used to measure the separation of pairs of particle images between successive frames, which can be optimized in terms of spatial resolution, detection rate, accuracy and reliability.
Journal ArticleDOI
A four-organ-chip for interconnected long-term co-culture of human intestine, liver, skin and kidney equivalents
Ilka Maschmeyer,Alexandra Lorenz,Katharina Schimek,Tobias Hasenberg,Anja Patricia Ramme,Juliane Hübner,Marcus Lindner,Christopher Drewell,Sophie Bauer,Alexander Thomas,Naomia Sisoli Sambo,Frank Sonntag,Roland Lauster,Uwe Marx +13 more
TL;DR: This study is the first approach to establish a system for in vitro microfluidic ADME profiling and repeated dose systemic toxicity testing of drug candidates over 28 days in co-culture, and assures near to physiological fluid-to-tissue ratios.
Journal ArticleDOI
Topological defects in epithelia govern cell death and extrusion.
Thuan Beng Saw,Amin Doostmohammadi,Vincent Nier,Leyla Kocgozlu,Sumesh P. Thampi,Sumesh P. Thampi,Yusuke Toyama,Philippe Marcq,Chwee Teck Lim,Julia M. Yeomans,Benoit Ladoux +10 more
TL;DR: A mechanism for apoptotic cell extrusion is proposed: spontaneously formed topological defects in epithelia govern cell fate, and the ability to control extrusion hotspots by geometrically inducing defects through microcontact printing of patterned monolayers is demonstrated.
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Phototactic guidance of a tissue-engineered soft-robotic ray.
Sung-Jin Park,Mattia Gazzola,Kyung Soo Park,Shirley Park,Valentina Di Santo,Erin L. Blevins,Johan Ulrik Lind,Patrick H. Campbell,Stephanie Dauth,Andrew K. Capulli,Francesco S. Pasqualini,Seungkuk Ahn,Alexander Cho,Hongyan Yuan,Ben M. Maoz,Ragu Vijaykumar,Jeong-Woo Choi,Karl Deisseroth,Karl Deisseroth,George V. Lauder,Lakshminarayanan Mahadevan,Lakshminarayanan Mahadevan,Kevin Kit Parker,Kevin Kit Parker +23 more
TL;DR: In this article, a tissue-engineered ray was constructed from rat cardiomyocytes on an elastomeric body enclosing a microfabricated gold skeleton to mimic the fin deflection patterns of batoid fish.
Journal Article
Phototactic guidance of a tissue-engineered soft-robotic ray.
Sung-Jin Park,Mattia Gazzola,Kyung Soo Park,Shirley Park,Valentina Di Santo,Karl Deisseroth,George V. Lauder,Lakshminarayanan Mahadevan,Kevin Kit Parker +8 more
TL;DR: Inspired by the relatively simple morphological blueprint provided by batoid fish such as stingrays and skates, a biohybrid system that enables an artificial animal—a tissue-engineered ray—to swim and phototactically follow a light cue is created.
References
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Journal ArticleDOI
On the accuracy of velocity and vorticity measurements with PIV
TL;DR: In this paper, a number of numerical techniques aimed at improving the accuracy of measurements using the correlation approach in Particle Image Velocimetry, PIV, are proposed and investigated.
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Spatial fluctuations of fluid velocities in flow through a three-dimensional porous medium.
TL;DR: It is found that the velocity magnitudes and the velocity components both along and transverse to the imposed flow direction are exponentially distributed, even with residual trapping of a second immiscible fluid.
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Two-dimensional Gaussian regression for sub-pixel displacement estimation in particle image velocimetry or particle position estimation in particle tracking velocimetry
Holger Nobach,Markus Honkanen +1 more
TL;DR: An explicit solution of two-dimensional Gaussian regression for the estimation of particle displacement from the correlation function in particle image velocimetry (PIV) or particle position from the images in PTV with sub-pixel accuracy is introduced in this paper.
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Rapid disorganization of mechanically interacting systems of mammary acini
Quanming Shi,Rajarshi P. Ghosh,Hanna Engelke,Chris H. Rycroft,Chris H. Rycroft,Luke Cassereau,James A. Sethian,James A. Sethian,Valerie M. Weaver,Jan Liphardt +9 more
TL;DR: Pairs or groups of mammary acini can interact mechanically over long distances through the collagen matrix, and these directed mechanical interactions facilitate transition to an invasive phenotype.
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Evolution of the turbulent/non-turbulent interface of an axisymmetric turbulent jet
TL;DR: Westerweel et al. as mentioned in this paper measured a turbulent round air jet, using particle image velocimetry, to investigate the dynamics and transport processes at the continuous bounding interface between the turbulent and non-turbulent regions (T/NT) of the jet flow.