A comparison of slider bearing simulations using different models

Author

Ruiz, O.J. ; Bogy, D.B.

Author_Institution

Dept. of Mech. Eng., California Univ., Berkeley, CA, USA

Volume

24

Issue

6

fYear

1988

fDate

11/1/1988 12:00:00 AM

Firstpage

2754

Lastpage

2756

Abstract

Recently published air bearing calculations for close spacings or high Knudsen numbers have been contradictory. A. Burgdorfer (1959) introduced a first-order correction to the continuum nonslip boundary condition used in the Reynolds equation. A second-order correction was then suggested by Y. Hsia et al. (1983). Gans (1985) presented developments based on the linearized Boltzmann equation. S. Fukui and R. Kaneko (1986) re-examined Boltzmann´s linearized equation and derived a different lubrication equation, the FK model. The present authors have carried out numerical simulations for actual taper-flat slider-bearing designs, using the continuum model, the first- and second-order slip corrections, and the FK model. The calculations show that for Knudsen numbers relevant to this application, the second-order slip model gives a better approximation to the FK equation than the first-order model

Keywords

Knudsen flow; lubrication; magnetic heads; modelling; simulation; FK model; Knudsen numbers; Reynolds equation; air bearing calculations; close spacings; continuum model; continuum nonslip boundary condition; first-order model; linearized Boltzmann equation; lubrication equation; magnetic heads; models; numerical simulations; second-order slip model; slider bearing simulations; slip corrections; taper-flat slider-bearing designs; Boltzmann equation; Boundary conditions; Differential equations; Distribution functions; Gallium nitride; Integral equations; Lubrication; Mechanical engineering; Nonlinear equations; Numerical simulation;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92235

Filename

92235