| Project/Area Number |
23560184
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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 | Tohoku University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
TAKENO Takanori 東北大学, 大学院工学研究科, 助教 (00451617)
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| Co-Investigator(Renkei-kenkyūsha) |
TAKAGI Toshiyuki 東北大学, 流体科学研究所, 教授 (20197065)
MIKI Hiroyuki 東北大学, 学際科学フロンティア研究所, 准教授 (80325943)
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| Project Period (FY) |
2011 – 2013
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 希薄気体力学 / 気体潤滑 / トライボロジー / ボルツマン方程式 / 分子流体力学 / DSMC法 / 流体工学 / 分子気体潤滑方程式 |
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| Research Abstract |
It was reported that in the case where partially-polished diamond-coated surface is used for sliding, the friction coefficient is drastically reduced as sliding speed increases. It was also reported that the surface texturing results in good tribological performance of sliding surfaces. The reason of their good tribological performance may be because the lift force is induced by the surface structure in micro/nanosclale gas flow between sliding surfaces. However, the understanding of these phenomena is not enough, and, the past researches were performed by the trial-and-error method. In the present work, in order to understand these phenomena clearly, the mechanism of high gas pressure generation induced by the micro surface structure was theoretically clarified. Using the knowledge obtained here, we clarified the optimal shape of surface structure. Our theory was validated by the sliding experiment.
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