Flow measurements in microspace using sub-micron fluorescent particles (proposal of spatial averaged time-resolved PTV considering Brownian motion of tracer particles)

Seijiro Inaba, Yohei Sato, Koichi Hishida, Masanobu Maeda

Research output: Contribution to journalArticle

Abstract

A measurement technique for a flow field in a microchannel was developed using sub micron fluorescent particles. The present study focused on a novel measurement technique so called Spatial Averaged Time-resolved Particle Tracking Velocimetry (SAT-PTV) which is able to detect the temporal variation of a fluid flow eliminating the effect of Brownian motion of the sub-micron tracer particles. Velocity vectors of individual tracer particles were averaged within a local small area, instead of temporal aerage, to realize higher time resolution. SAT-PTV method was evaluated by synthetic particle images in both a uniform flow and a flow with linear velocity gradient and the method confirmed the reduction of the measurement errors associated with Brownian motion. The validation of the present technique was performed in a microchannel flow with the time resolution of 37 ms.

Original languageEnglish
Pages (from-to)3033-3040
Number of pages8
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume68
Issue number675
DOIs
Publication statusPublished - 2002 Nov

Keywords

  • Brownian Motion
  • Digital Image Processing
  • Flow Measurements
  • Fluorescent Particles
  • Microspace
  • PIV
  • PTV
  • Velocity Distribution

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanical Engineering

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