| Project/Area Number |
08555041
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
設計工学・機械要素・トライボロジー
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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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| Co-Investigator(Kenkyū-buntansha) |
KANENO Reizo Wakayama University, Faculty of Systems Engineering, Professor, 教授 (20283955)
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| Project Period (FY) |
1996 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥5,500,000 (Direct Cost: ¥5,500,000)
Fiscal Year 1998: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1997: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1996: ¥3,300,000 (Direct Cost: ¥3,300,000)
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| Keywords | Molecular Gas Dynamics / Direct Simulation Monte Carlo (DSMC) / Micro / Nano-tribology / Molecular Gas-film Lubrication (MGL) / Magnetic Recording / Magnetic Disk Storage / Flying Head Sliders / Micro Mechanism |
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| Research Abstract |
This research project investigated flying characteristics of flying head sliders with ultra-thin spacings for ultra high density magnetic recording, by the use of "direct simulation Monte Carlo (DS MC)" technique and the generalized gas film lubrication equation called "Molecular Gas-film Lubrication (MGL)" equation. First, basic 2-dimensional DSMC programs for fundamental analyses of lubrication characteris tics were developed, and then basic simulations for step-type slider gas bearings with nanometer spacings were analyzed and compared with BGK-model-based MGL analyses. Pressure distributions were numerically calculated for the step-type sliders with boundary velocity, U, and spacing ratio, ho/hi (hi : inlet spacing, ho : outlet spacing), as parameters. It is revealed that the results of the DSMC method agrec well with those of the MOL analyses almost everywhere except at the step position. Second, the DSMC program was extended to the 3-dimensional molecular gas-film lubrication problems with surface roughnesses and the basic characterisitics are compared with MGL results. These results lead to the average flow model for the lubrication analyses with surface roughnesses, which is very important for near-contact magnetic heads for future recording systems.
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