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
Publication statusPublished - 2002 Nov

Fingerprint

Brownian movement
flow measurement
Flow measurement
Microchannels
Velocity measurement
tracers
proposals
Measurement errors
Flow of fluids
Flow fields
microchannels
uniform flow
fluid flow
flow distribution
gradients

Keywords

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

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

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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.",
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AU - Inaba, Seijiro

AU - Sato, Yohei

AU - Hishida, Koichi

AU - Maeda, Masanobu

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N2 - 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.

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