磁记录非牛顿液膜润滑仿真

Simulation of Non-Newtonian Liquid Lubrication of Magnetic Head-disk Interface

随着记录密度的不断提高,头盘浮动间隙不断减小。目前近场光、磁混合记录已经在研究10nm以下的浮动系统。由于浮动间隙已远小于空气分子平均自由程(室温下约65nm)而有使气膜浮动技术有失效的危险。非牛顿液膜浮动技术就是在这种背景下在近几年备受关注的。该文提出了一个新的非牛顿润滑液膜,建立了考虑表面粗糙度影响的非牛顿液膜浮动系统模型,对不同表面粗糙度形状系数进行了仿真研究。研究表明,非牛顿液膜浮动系统的性能与气膜的情况有很大的差异。

With the continual increase of the recording density, the head-disk gap is decreased accordingly. Nowadays the head-disk gap in the NFOMHR that is going on in the lab is below 10nm. But some researches show that it has the probability of failure since the head-disk gap is less than the mean free path of air (65nm at room condition). Thus a new non-Newtonian liquid lubrication method is presented and focused on extensively. A new non-Newtonian liquid lubrication method is presented, the non-Newtonian lubrication equation for rough surface is deduced. We carry out computer simulation for different surface roughness coefficients. The results show that great differences exist between the slider bearing system design of non-Newtonian liquid film and air film.