| Project/Area Number |
10650057
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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 |
Applied physics, general
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| Research Institution | Tottori University |
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Principal Investigator |
FUKUI Shigehisa Tottori University, Faculty of Engineering, Professor, 工学部, 教授 (40273883)
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| Project Period (FY) |
1998 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥3,300,000 (Direct Cost: ¥3,300,000)
Fiscal Year 1999: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1998: ¥2,600,000 (Direct Cost: ¥2,600,000)
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| Keywords | Molecular Gas Dynamics / Boltzmann Equation / Direct Simulation Monte Carlo / Thermal Creep Flow / Microtribology / Molecular Gas-film Lubrication / Nanotechnology / Micro Mechanism / モンテカルロ 直接シミュレーション(DSHC) / モンテカルロ直接シミューレーション(DSMC) / 非接触マイクロメカニズム / 動特性 |
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| Research Abstract |
This research estimates the static and dynamic characteristics of the micro levitation mechanism caused by thermal creep flow, which occurs only in regions where the Knudsen number defined as the ratio of the molecular mean free path and the characteristic length is not negligible, between two parallel plates with submicron spacings and temperature gradients. Linearization analysis method in frequency domain of the static and dynamic characteristics is established by the use of the molecular gas film lubrication equation(MGL equation) including thermal creep flow effects, which is a Reynolds-type gas bearing equation for arbitrarily small spacings. Static pressure distributions by the method are compared with those by the direct simulation Monte Carlo (DSMC) technique and are found to agree well with each other. Dynamic pressures, which consist of stiffness and damping characteristics, are also analyzed by the linearization method of the MGL equation. The results of this research are helpful in designing the thermally induced micro levitation mechanism.
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