Abstract
This paper describes PIV measurements ofthe flow field in a micro round tube with an internal diameter of 100 μm in order to examine micro-scale effects. Since the refractive index of the micro tube almost corresponds to that of water, the inner flow in the tube can be observed clearly. The micro PIV system has been developed using a microscope, a high sensitive CCD camera, a double pulsed Nd:YAG laser and optics. Applying the micro PIV technique to the flow, the velocity distributions with spatial resolution of 1.8 × 1.8 μm were measured even near the wall in the center plane of the round tube. It was found that the velocities near the tube wall were smaller than the theoretical values calculated by using Poiseuille’s law. It is believed that this disparity is due to micro-scale effects such as interference between particles and the wall, friction at the wall, surface tension and so on.
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Yasuhiko Sugii: He received his Ph. D degree from Osaka Prefecture University in 2000. He worked in Kao corporation from 1992 to 1995, and he was a post-doctoral fellow in Nuclear Engineering Research Laboratory, University of Tokyo from 2000 to 2002. He works as a research associate in Nuclear Engineering Research Laboratory, University of Tokyo since 2002. His research interests are in the image measurement of flow field, bio-fluid mechanics in blood flow and micro flow dynamics in MEMS and Micro TAS.
Koji Okamoto: He received his MSc(Eng) in Nuclear Engineering in 1985 from University of Tokyo. He also received his Ph.D in Nuclear Engineering in 1992 from University of Tokyo. He worked in Department of Nuclear Engineering, Texas A& M University as a visiting associate professor in 1994. He works in Nuclear Engineering Research Laboratory, University of Tokyo as an associate professor since 1993. His research interests are Quantitative Visualization, PIV, Holographic PIV Flow Induced Vibration and Thermal-hydraulics in Nuclear Power Plant.
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Sugii, Y., Okamoto, K. Quantitative visualization of micro-tube flow using micro-PIV. J Vis 7, 9–16 (2004). https://doi.org/10.1007/BF03181480
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DOI: https://doi.org/10.1007/BF03181480