| Project/Area Number |
25249129
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Naval and maritime engineering
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| Research Institution | National Maritime Research Institute |
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Principal Investigator |
ANDO HIROTOMO 国立研究開発法人 海上技術安全研究所, その他部局等, 上席研究員 (70462869)
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| Co-Investigator(Kenkyū-buntansha) |
MASUDA MITSUTOSHI 国立研究開発法人産業総合研究所, その他部局等, 研究員 (70358000)
IWAMOTO KAORU 国立大学法人東京農工大学, 工学(系)研究科(研究院), 准教授 (50408712)
KAWASHIMA HIDEKI 国立研究開発法人海上技術安全研究所, その他部局等, 研究員 (20450679)
MIYATA OSAMU 国立研究開発法人海上技術安全研究所, その他部局等, 研究員 (10450678)
TAKAHASHI CHIORI 国立研究開発法人海上技術安全研究所, その他部局等, 研究員 (40399530)
SEKI YASUYUKI 国立研究開発法人海上技術安全研究所, その他部局等, 研究員 (20645220)
TOMOHIRO SATOSHI 国立研究開発法人海上技術安全研究所, その他部局等, 研究員 (70761039)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥46,930,000 (Direct Cost: ¥36,100,000、Indirect Cost: ¥10,830,000)
Fiscal Year 2015: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2014: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2013: ¥34,840,000 (Direct Cost: ¥26,800,000、Indirect Cost: ¥8,040,000)
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| Keywords | 船底摩擦低減 / ソフトマター / ポリマー会合 |
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| Outline of Final Research Achievements |
In this study, we tried to create interfaces between solid surface and liquid by polymer elution from solid walls to reduce the frictional drag that applied to the walls in turbulent flow. The technology is based on the Toms effect that causes frictional-drag reduction by addition of polymers in turbulent flow. However, it is difficult to create suitable interfaces by polymer elution since the reduction mechanism of the frictional drag is not well clarified. Therefore, we aimed to elucidate the mechanism of the Toms effect with regard to polymer-turbulence interaction, synthesize polymers with appropriate association property, and establish the control method of elution. As major outcomes, we have developed the calculation method that can evaluate the interaction between associated polymers and turbulence using direct numerical simulation in which polymer association is represented by using beads-spring-dashpot chain model.
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