Modeling the Flying Characteristics of a Rough Magnetic Head Over a Rough Rigid-Disk Surface

[+] Author and Article Information
R. M. Crone, M. S. Jhon

Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213

B. Bhushan, T. E. Karis

IBM Research Division, Almaden Research Center, San Jose, CA 95120

J. Tribol 113(4), 739-749 (Oct 01, 1991) (11 pages) doi:10.1115/1.2920687 History: Received November 16, 1990; Revised April 08, 1991; Online June 05, 2008


The volumetric information storage density of rigid disk drives continues to increase through decreases in the slider-disk separation (i.e., the flying height). Reductions in slider-disk separations are achieved primarily through smoother surfaces on the magnetic media. The limiting factor in decreasing the slider-disk separation is the interactions that occur between the slider and the diminishing surface roughness and the impact that this roughness has on the transient and steady-state flying characteristics of the recording head. In this paper, we present a new finite element algorithm to solve the modified Reynolds equation that is specifically designed to utilize state of the art vector/parallel hardware. To the authors’ knowledge, this is the first numerical simulation of the flying characteristics of a finite width slider over a rigid disk surface which directly incorporates three-dimensional surface roughness. The effects that the magnitude, orientation, shape, and location (i.e., roughness on the disk or slider) of the surface roughness has on the steady-state slider flying characteristics are presented.

Copyright © 1991 by The American Society of Mechanical Engineers
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