A particle image velocimetry system for microfluidics

被引：0

作者：

J. G. Santiago

S. T. Wereley

C. D. Meinhart

D. J. Beebe

R. J. Adrian

机构：

[1] Department of Electrical and Computer Engineering,

[2] Beckman Institute for Advanced Science and Technology,undefined

[3] 4265 Beckman Institute,undefined

[4] University of Illinois,undefined

[5] Urbana,undefined

[6] IL 61801,undefined

[7] USA,undefined

[8] Department of Mechanical and Environmental Engineering,undefined

[9] University of California,undefined

[10] Santa Barbara,undefined

[11] CA 93106,undefined

[12] USA,undefined

[13] Department of Theoretical and Applied Mechanics,undefined

[14] University of Illinois,undefined

[15] Urbana,undefined

[16] IL 61801,undefined

[17] USA,undefined

来源：

Experiments in Fluids | 1998年 / 25卷

关键词：

Particle Image Velocimetry; Instantaneous Velocity; Seed Particle; Bulk Velocity; Elliptical Cylinder;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

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.

引用

页码：316 / 319

页数：3