In this study, a cross-sectional capacitance is measured in a microchannel with 12 multi-layered electrodes. The cross-sectional capacitance of polystyrene particles and deionized water is measured at upstream and downstream microchannel. Based on the measured cross-sectional capacitance, the particle volume fraction is calculated at three area measurements with different electrode pair. The three area measurements are at the adjacent pair, horizontal pair and vertical pair. The particle volume fraction at the adjacent pair area is almost same and higher at upstream and downstream cross-section. While at the vertical and horizontal pair areas, the particle volume fraction increased from upstream to downstream cross-section around 1.0–9.3% at electrode pair near the walls whilst decreased 0.4–0.96% at electrode pair near the center streamlines. It shows the particles are more attracted to migrate to the equilibrium position at near to the walls. The particles migration induced by inertial lift forces is reflected to Serge-Silberberg phenomenon where the particles are distributed and transverse from the center streamlines of fluid flowing to the area near the walls.
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ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 Fluids Engineering Division Summer Meeting
July 8–12, 2012
Rio Grande, Puerto Rico, USA
Conference Sponsors:
- Heat Transfer Division
- Fluids Engineering Division
ISBN:
978-0-7918-4479-3
PROCEEDINGS PAPER
Cross-Sectional Measurement of Micro Particles Volume Fraction in a Microchannel by Using Capacitance Tomography Sensing
Nur Tantiyani Ali Othman,
Nur Tantiyani Ali Othman
Chiba University, Chiba, Japan
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Hiromichi Obara,
Hiromichi Obara
Tokyo Metropolitan University, Hachiouji, Japan
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Masahiro Takei
Masahiro Takei
Chiba University, Chiba, Japan
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Nur Tantiyani Ali Othman
Chiba University, Chiba, Japan
Hiromichi Obara
Tokyo Metropolitan University, Hachiouji, Japan
Je-Eun Choi
Chiba University, Chiba, Japan
Masahiro Takei
Chiba University, Chiba, Japan
Paper No:
ICNMM2012-73057, pp. 769-776; 8 pages
Published Online:
July 22, 2013
Citation
Othman, NTA, Obara, H, Choi, J, & Takei, M. "Cross-Sectional Measurement of Micro Particles Volume Fraction in a Microchannel by Using Capacitance Tomography Sensing." Proceedings of the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2012 Heat Transfer Summer Conference and the ASME 2012 Fluids Engineering Division Summer Meeting. ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. Rio Grande, Puerto Rico, USA. July 8–12, 2012. pp. 769-776. ASME. https://doi.org/10.1115/ICNMM2012-73057
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