| Project/Area Number |
21540393
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Oita University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
ORIHARA Hiroshi 北海道大学, 工学研究科, 教授 (30177307)
NA Yang-ho 北海道大学, 工学研究科, 助教 (00421991)
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| Co-Investigator(Renkei-kenkyūsha) |
NARA Shigetoshi 岡山大学, 自然科学研究科, 教授 (60231495)
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| Project Period (FY) |
2009 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2009: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
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| Keywords | 散逸構造 / トポロジカル欠陥 / レオロジー / 液晶 / パターン形成 |
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| Research Abstract |
The apparent viscosity of nematic liquid crystals under the electro-hydrodynamic convection(EHC) has been investigated experimentally. When the EHC is induced, the apparent viscosity increases and then decreases as the increase of applied voltage. The peak voltage of viscosity does not depend on the transition voltage at which many topological defects appear and the decrease of viscosity happens in the second type of turbulent state. By adopting the Ericksen-Leslie theory, it is speculated that the anisotropy of turbulent state created by the shear field makes the shear stress relevant to the electric field negative, which reduces the apparent viscosity of the liquid crystal.
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