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Published April 2007 | metadata_only
Journal Article

Microscale 3D flow mapping with μDDPIV


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 μm^2 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.

Additional Information

© 2007 Springer-Verlag. Received: 27 March 2006; Revised: 3 December 2006; Accepted: 5 January 2007; Published online: 22 February 2007.

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August 22, 2023
August 22, 2023