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Research on Flying Characterisics of Flying Head Sliders with Ultra-thin Spacings

超薄间距飞头滑块飞行特性研究

基本信息

批准号：
08555041
负责人：
FUKUI Shigehisa
金额：
$ 3.52万
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：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08555041/
关键词：
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

项目摘要

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.

本研究项目利用“直接模拟蒙特卡罗（DS MC）”技术和广义气膜润滑方程“分子气膜润滑（MGL）”方程，研究用于超高密度磁记录的超薄间距飞行磁头滑块的飞行特性。首先，开发了用于润滑特性基本分析的基本二维 DSMC 程序，然后对纳米间距的阶梯式滑块气体轴承进行了基本模拟分析，并与基于 BGK 模型的 MGL 分析进行了比较。以边界速度 U 和间距比 ho/hi（hi ：入口间距，ho ：出口间距）为参数，对阶梯型滑块的压力分布进行数值计算。结果表明，除台阶位置外，DSMC 方法的结果与 MOL 分析的结果几乎在所有地方都吻合良好。其次，将DSMC程序扩展到具有表面粗糙度的3维分子气膜润滑问题，并将基本特征与MGL结果进行比较。这些结果得出了用于表面粗糙度润滑分析的平均流量模型，这对于未来记录系统的近接触磁头非常重要。