| Budget Amount *help |
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2019: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
Fiscal Year 2017: ¥6,760,000 (Direct Cost: ¥5,200,000、Indirect Cost: ¥1,560,000)
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| Outline of Final Research Achievements |
The inertial migration and focusing of particles suspended in a pressure-driven flow through straight tubes with various cross-sections and various sizes was investigated experimentally and numerically in a wide range of Reynolds numbers. In experiments, direct observations of the particle distribution in downstream cross-sections indicated the presence of several types of the particle focusing position in the tube cross-section and several regimes of the Reynolds number for the particle focusing pattern, depending on the size ratio of the particle diameter to the tube width, rheological properties of the particle and the suspending medium as well as the cross-sectional shape of the tube. The numerical simulation using the immersed boundary method accounted for the particle focusing patterns observed experimentally, and provided the explanation for the transition between the particle focusing patterns, based on the lateral force exerted on the particle.
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