2011 Fiscal Year Final Research Report
STUDY OF EFFECT OF VISCOSITY RESISTANCE IN ELECTROFHEOLOGICAL FLUID BY MICRO GRAVITY EXPERIMENTS
| Project/Area Number |
22654044
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Mathematical physics/Fundamental condensed matter physics
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| Research Institution | Shinshu University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
YONO Kenntei (YONO YU Jianding) 宇宙航空研究開発機構, 宇宙科学研究所, 主幹研究員 (40358750)
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| Project Period (FY) |
2010 – 2011
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| Keywords | 流体物理学 |
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| Research Abstract |
We reported the first observation of electrorheological(ER) effect in a single phase ER suspension, comprising mono-dispersed dielectric particles, from a microgravity experiment. A highly sensitive electro-rheometer was designed for the measurements and the results show that, in the microgravity environment, the particles can form stable single phase suspension without a suspending liquid, which is usually necessary for the conventional ER fluid. It is found from the experiments that the size of the column structures formed by the particles exceeds the maximum column width usually observed in the two-phase ER fluids. Finite element method(FEM) was used to evaluate numerically the variation of the electric energy density with respect to the strain, and the results yield a good account of the measured data, especially in the low field region.
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