Microresolution particle image velocimetry

Steve T. Wereley; Juan G. Santiago; Richard Chiu; Carl D. Meinhart; Ronald J. Adrian

doi:10.1117/12.304370

26 March 1998 Microresolution particle image velocimetry

Steve T. Wereley, Juan G. Santiago, Richard Chiu, Carl D. Meinhart, Ronald J. Adrian

Proceedings Volume 3258, Micro- and Nanofabricated Structures and Devices for Biomedical Environmental Applications; (1998) https://doi.org/10.1117/12.304370
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

Particle image velocimetry (PIV), a technique commonly used at the macroscopic level to measure velocity vectors of particle-seeded flows, is adapted to measure both instantaneous and ensemble-averaged flow fields in microfluidic MEMS devices, where micro-scale spatial resolution is critical. Adapting PIV to the microscopic level presents a number of challenges, including: (1) visualizing tracer particles that are smaller than the wavelength of light, (2) minimizing errors due to the Brownian motion of the tracer particles, and (3) recording particle images with short exposure times, so that their motion does not cause particle streaking in the image field. The PIV technique is used to measure a low Reynolds number Hele-Shaw flow around a roughly 30 micrometers elliptical obstruction and a low Reynolds number flow through a 20 X 200 micrometers capillary tube. Velocity vector fields are presented with a spatial resolution of 6.9 X 6.9 X 1.5 micrometers . In principle, super-resolution particle tracking velocimetry can be used to extend the spatial resolution of the velocity measurements down to approximately 1.5 X 1.5 X 1.5 micrometers .

Citation Download Citation

Steve T. Wereley, Juan G. Santiago, Richard Chiu, Carl D. Meinhart, and Ronald J. Adrian "Microresolution particle image velocimetry", Proc. SPIE 3258, Micro- and Nanofabricated Structures and Devices for Biomedical Environmental Applications, (26 March 1998); https://doi.org/10.1117/12.304370

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