Cross-sectional capacitance measurement of particle concentration in a microchannel with multi-layered electrodes

Nur Tantiyani Ali Othman, Hiromichi Obara, Masahiro Takei

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

In the present study, cross-sectional capacitance is measured in a microchannel with 12 multi-layered electrodes. The cross-sectional capacitances of microparticles of three different diameters are measured upstream and downstream. Based on these measurements, the particle concentration in terms of particle volume fraction is calculated. The particle volume fractions at three configuration areas of electrode pairs, namely, at ones containing adjacent, horizontal, and vertical pairs, are considered for ease of understanding of the particle concentration for different electrode pairs. The particle volume fraction shows an increment of 1.0-9.3% for electrode pairs near the channel walls, but decreased by 0.4-0.96% for center electrode pairs from the upstream cross-section to the downstream cross-section. Moving from the inlets to the outlet, the particles drift away from the center of the microchannel and approach the channel walls and the number of particles that migrate toward the channel walls increases clearly in the outlet area.

Original languageEnglish
Pages (from-to)47-54
Number of pages8
JournalFlow Measurement and Instrumentation
Volume31
DOIs
Publication statusPublished - Jun 2013
Externally publishedYes

Fingerprint

Capacitance measurement
Microchannel
Capacitance
microchannels
Microchannels
Electrode
capacitance
Electrodes
electrodes
Volume fraction
Volume Fraction
outlets
upstream
Cross section
cross sections
microparticles
Increment
Horizontal
Adjacent
Vertical

Keywords

  • Cross-sectional capacitance
  • Microchannel
  • Multi-layer electrodes
  • Particle volume fraction
  • Two-phase flow

ASJC Scopus subject areas

  • Instrumentation
  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

Cross-sectional capacitance measurement of particle concentration in a microchannel with multi-layered electrodes. / Ali Othman, Nur Tantiyani; Obara, Hiromichi; Takei, Masahiro.

In: Flow Measurement and Instrumentation, Vol. 31, 06.2013, p. 47-54.

Research output: Contribution to journalArticle

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N2 - In the present study, cross-sectional capacitance is measured in a microchannel with 12 multi-layered electrodes. The cross-sectional capacitances of microparticles of three different diameters are measured upstream and downstream. Based on these measurements, the particle concentration in terms of particle volume fraction is calculated. The particle volume fractions at three configuration areas of electrode pairs, namely, at ones containing adjacent, horizontal, and vertical pairs, are considered for ease of understanding of the particle concentration for different electrode pairs. The particle volume fraction shows an increment of 1.0-9.3% for electrode pairs near the channel walls, but decreased by 0.4-0.96% for center electrode pairs from the upstream cross-section to the downstream cross-section. Moving from the inlets to the outlet, the particles drift away from the center of the microchannel and approach the channel walls and the number of particles that migrate toward the channel walls increases clearly in the outlet area.

AB - In the present study, cross-sectional capacitance is measured in a microchannel with 12 multi-layered electrodes. The cross-sectional capacitances of microparticles of three different diameters are measured upstream and downstream. Based on these measurements, the particle concentration in terms of particle volume fraction is calculated. The particle volume fractions at three configuration areas of electrode pairs, namely, at ones containing adjacent, horizontal, and vertical pairs, are considered for ease of understanding of the particle concentration for different electrode pairs. The particle volume fraction shows an increment of 1.0-9.3% for electrode pairs near the channel walls, but decreased by 0.4-0.96% for center electrode pairs from the upstream cross-section to the downstream cross-section. Moving from the inlets to the outlet, the particles drift away from the center of the microchannel and approach the channel walls and the number of particles that migrate toward the channel walls increases clearly in the outlet area.

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