Development of the dynamic simulation system for contact-type magnetic heads based on molecular gas/liquid film lubrication (MGL/MLL)

基于分子气/液膜润滑（MGL/MLL）的接触式磁头动态仿真系统开发

• 批准号: 12555041
• 负责人: FUKUI Shigehisa
• 金额: $ 6.72万
• 依托单位: Tottori University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2000
• 资助国家: 日本
• 起止时间: 2000 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-12555041/
• 关键词: Microtribology; Molecular Gas-film Lubrication; Direct Simulation Monte Carlo; Flying Head Slider; Molecular Liquid-film Lubrication; Magnetic Storage Devices; Nanotechnology; Meniscus Force; モンテカルロ直接シミュレーション(DSMC); メンスカス力

In this year, three research are planned and executed; 1) for the understanding of the near contact head characteristics considering both Molecular Gas-film Lubrication (MGL) and Molecular Liquid-film Lubrication (MLL) effects, surface deformations of the liquid under line air pressure or pressures caused by slider bearings were calculated using long-wave theory, which gives time-dependent deformations of very thin film layer considering surface tension and van der Waals forces, 2) the generalized formula of the van der Waals force was newly developed which can be applied to the general problems such as the HDI problems, and static and dynamic characteristics of the flying head sliders were analyzed including the van der Waals forces, 3) dynamic characteristics of liquid meniscus bridge, which shows the time dependent characteristics of contact angle and liquid curvatures observed by means of high speed video camera, were analyzed based on the assumption that i) the boundary positions are time-variable (VBP model) and ii) the contact angles are time-variable (VCA model), and the experimental results showed the tendency between analytical results of VBP model and VCA model.

在这一年里，计划并执行了三项研究; 1）为了理解考虑分子气膜润滑（MGL）和分子液膜润滑（MLL）效应的近接触头特性，使用长波理论计算了在线空气压力或由滑动轴承引起的压力下液体的表面变形，该公式给出了考虑表面张力和货车der Waals力的非常薄的膜层的时间相关的变形，2）新开发的货车der Waals力的广义公式可以应用于诸如HDI问题的一般问题，分析了浮动头滑块的静态和动态特性，包括货车德瓦尔斯力; 3）弯月面桥的动态特性，通过高速摄像机观察到接触角和液体曲率随时间的变化特性，基于以下假设进行了分析：i）边界位置是时变的实验结果表明，VBP模型和VCA模型的分析结果有一定的趋势。

项目成果

S.Fukui, K.Yamane: "DSMC/MGL Comparisons of Stress on Slider Air Bearing with Nanometer Spacings"IEEE Transactions on Magnetics. Vol.38, No.5. 2153-2155 (2002)

S.Fukui、K.Yamane：“DSMC/MGL 纳米间距滑块空气轴承上的应力比较”IEEE 磁学汇刊。

H.Matsuoka, T.Kato, S.Fukui: "Nanomeniscus Forces in Undersaturated Vapors : Observable Limit of Macroscopic Characteristics"Langmuir. Vol.18, No.18. 6796-6801 (2002)

H.Matsuoka、T.Kato、S.Fukui：“不饱和蒸气中的纳米弯月力：宏观特征的可观察极限”Langmuir。

S.Fukui, K.Yamane: "Molecular Gas Film Lubrication in Ultra-high Knudsen Number Regime-New Formulation of MGL Problems for Free Molecular Flow-"Proceedings of International Tribology Conference Nagasaki 2000. Vol.III. 2123-2127 (2001)

S.Fukui，K.Yamane：“超高努森数状态下的分子气膜润滑-自由分子流MGL问题的新表述-”长崎国际摩擦学会议记录2000年。Vol.III。

小西範和, 中野頼人, 山根清美, 松岡広成, 福井茂寿, 鈴木允: "ニアコンタクト領域のMGLダイナミクス解析(CIP法による2自由度挙動解析)"日本機械学会IIP2001情報・知能・精密機器部門講演会論文集. No.01-1. 34-39 (2001)

Norikazu Konishi、Yorito Nakano、Kiyomi Yamane、Hironari Matsuoka、Shigetoshi Fukui 和 Masaru Suzuki：“近接触区域的 MGL 动力学分析（使用 CIP 方法的 2 自由度行为分析）” 日本机械工程学会 IIP2001信息、情报和精密仪器系讲座论文集第 34-39 号（2001 年）。

H.Matsuoka, T.Kato, S.Fukui: "Nanomeniscus Forces in Undersaturated Vapors : Observable Limit of Macroscopic Characteristics"Lnagumuir. Vol.18, No.18. 6796-6801 (2002)

H.Matsuoka、T.Kato、S.Fukui：“不饱和蒸气中的纳米弯月力：宏观特征的可观察极限”Lnagumuir。