Rheology and topological defects in dissipative structures in liquid crystals
| 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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Report
(4 results)
Research Products
(23 results)
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[Presentation] 電気対流下のMBBAの粘度特性IV2012
Author(s)
長屋智之, 丹生幹康, 小野澤晃, 羅亮皓, 折原宏, 奈良重俊
Organizer
2012年日本物理学会第67回年次大会
Place of Presentation
関西学院大学上ヶ原キャンパス
Year and Date
2012-03-27
Related Report
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[Presentation] 電気対流下のMBBAの粘性2010
Author(s)
長屋智之, 池永暁弘, 丹生幹康, 羅亮皓, 折原宏, 奈良重俊
Organizer
2010年液晶学会討論会
Place of Presentation
九州大学医学部百年講堂
Year and Date
2010-09-06
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