Numerical Simulation of the Lubrication of the Head-Disk Interface Using a Non-Newtonian Fluid

[+] Author and Article Information
Frank A. De Bruyne, D. B. Bogy

Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California, Berkeley, CA 94720

J. Tribol 116(3), 541-548 (Jul 01, 1994) (8 pages) doi:10.1115/1.2928878 History: Received March 08, 1993; Revised July 16, 1993; Online June 05, 2008


The prospect of contact and near-contact recording in magnetic hard disk files naturally leads to reduced flying heights of the read-write head over the rigid disk. To avoid dry contact at these low head-to-disk spacings, a lubricant should be used to minimize wear and maximize reliability. Since fluids generally have a much greater viscosity than air and very large shear rates develop under the slider, it is believed that a fully flooded interface can only be practically possible if the fluid possesses a non-Newtonian character with a significant amount of shear-thinning. In this paper, we present results from extensive numerical simulations of the fully flooded head-disk interface using the finite element technique. This approach has proven very successful in calculating a wide variation of slider geometries for various fluid nonlinearities.

Copyright © 1994 by The American Society of Mechanical Engineers
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