| Project/Area Number |
26420118
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Fluid engineering
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| Research Institution | Kumamoto University |
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Principal Investigator |
Kawahara Akimaro 熊本大学, 大学院先端科学研究部(工), 准教授 (20224818)
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| Co-Investigator(Renkei-kenkyūsha) |
YONEMOTO YUKIHIRO 熊本大学, 大学院先導機構, 助教 (70516418)
NAKASHIMA YUTA 熊本大学, 先端科学研究部, 准教授 (70574341)
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
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| Keywords | 二相流 / 濡れ性 / 気泡長さ / 圧力損失 / マイクロチャンネル / マイクロ流路 / ミニ流路 / ボイド率 / 界面形状 / 非ニュートン流体 |
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| Outline of Final Research Achievements |
This study is to investigate the effects of the surface wettability on gas-liquid two-phase flow in mini- and micro-channels. Experiments were conducted for air (or nitrogen gas)-water two-phase flow in horizontal rectangular channels. In order to know the effects of surface wettability on the two-phase flow in mini-channel in the channels, the wettability around the gas inlet part in the channel was changed by coating hydrophobic agent. Flow pattern, bubble length, liquid slug length, bubble velocity and pressure drop were measured. From the measurement data, it is found that the hydrophobic surface makes bubble length longer in both the micro- and mini-channels. And then, the longer gas bubble could reduce the pressure drop. From the pressure drop data, the correlation for predicting the pressure drop was newly developed by accounting for the surface wettability.
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