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Experiments in Fluids

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01-04-2007 | Research Article

Microscale 3D flow mapping with μDDPIV

Authors: Francisco Pereira, Jian Lu, Emilio Castaño-Graff, Morteza Gharib

Published in: Experiments in Fluids | Issue 4/2007

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Abstract

Three-dimensional (3D) quantitative flow visualization by tracking microscale particles has become an invaluable tool in microfluid mechanics. Defocusing digital particle image velocimetry (DDPIV) can recover spatial coordinates by calculating the separation between defocused images generated by an aperture mask with a plurality of pinholes. In this paper, a high-speed 3D micro-DDPIV (μDDPIV) system was devised based on this technique to achieve microscale velocity field measurements. A micro-volume of 400 × 300 μm² with a depth of 150 μm has been mapped using an inverted microscope equipped with a 20× objective lens. The proposed technique was successfully applied to 3D tracking of 2-μm fluorescent particles inside an evaporating water droplet.

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Title: Microscale 3D flow mapping with μDDPIV
Authors: Francisco Pereira
Jian Lu
Emilio Castaño-Graff
Morteza Gharib
Publication date: 01-04-2007
Publisher: Springer-Verlag
Published in: Experiments in Fluids / Issue 4/2007
Print ISSN: 0723-4864
Electronic ISSN: 1432-1114
DOI: https://doi.org/10.1007/s00348-007-0267-5

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