Experiments in Fluids

, Volume 25, Issue 4, pp 316–319

A particle image velocimetry system for microfluidics

  • J. G. Santiago
  • S. T. Wereley
  • C. D. Meinhart
  • D. J. Beebe
  • R. J. Adrian

DOI: 10.1007/s003480050235

Cite this article as:
Santiago, J., Wereley, S., Meinhart, C. et al. Experiments in Fluids (1998) 25: 316. doi:10.1007/s003480050235

Abstract

 A micron-resolution particle image velocimetry (micro-PIV) system has been developed to measure instantaneous and ensemble-averaged flow fields in micron-scale fluidic devices. The system utilizes an epifluorescent microscope, 100–300 nm diameter seed particles, and an intensified CCD camera to record high-resolution particle-image fields. Velocity vector fields can be measured with spatial resolutions down to 6.9×6.9×1.5 μm. The vector fields are analyzed using a double-frame cross-correlation algorithm. In this technique, the spatial resolution and the accuracy of the velocity measurements is limited by the diffraction limit of the recording optics, noise in the particle image field, and the interaction of the fluid with the finite-sized seed particles. The stochastic influence of Brownian motion plays a significant role in the accuracy of instantaneous velocity measurements. The micro-PIV technique is applied to measure velocities in a Hele–Shaw flow around a 30 μm (major diameter) elliptical cylinder, with a bulk velocity of approximately 50 μm s-1.

Copyright information

© Springer-Verlag Berlin Heidelberg 1998

Authors and Affiliations

  • J. G. Santiago
    • 1
  • S. T. Wereley
    • 2
  • C. D. Meinhart
    • 2
  • D. J. Beebe
    • 1
  • R. J. Adrian
    • 3
  1. 1.Department of Electrical and Computer Engineering, Beckman Institute for Advanced Science and Technology, 4265 Beckman Institute, University of Illinois, Urbana, IL 61801, USAUS
  2. 2.Department of Mechanical and Environmental Engineering, University of California, Santa Barbara, CA 93106, USAUS
  3. 3.Department of Theoretical and Applied Mechanics, University of Illinois, Urbana, IL 61801, USAUS