Homogenization of the Generalized Reynolds Equation for Ultra-Thin Gas Films and Its Resolution by FEM-Reference-Cited by-同舟云学术

Homogenization of the Generalized Reynolds Equation for Ultra-Thin Gas Films and Its Resolution by FEM

Published:2004-06-28 Issue:3 Volume:126 Page:547-552
ISSN:0742-4787
Container-title:Journal of Tribology
language:en
Short-container-title:

Author:

Buscaglia G. C.¹,Jai M.²

Affiliation:

1. Instituto Balseiro and Centro Ato´mico Bariloche, 8400, Bariloche, Argentina

2. CNRS-UMR 5585, INSA de LYON, Mathe´matiques Bat Leonard de Vinci, F-69621 Villeurbanne, France

Abstract

We address the numerical modeling of roughness or texture effects in ultra-thin gas films. Rarefaction (high Knudsen number) effects are dealt with using the Generalized Reynolds Equation, and a homogenization procedure is proposed to rigorously account for arbitrary roughness/texture shapes. The presentation is focused on head-disk magnetic storage devices, but the techniques proposed are general. Some details of the implementation, along with numerical tests, are included. By removing the small space and time scales from the problem, the methodology allows for efficient modeling of slider bearings with small-scale features.

Publisher

ASME International

Subject

Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials

Link

http://asmedigitalcollection.asme.org/tribology/article-pdf/126/3/547/5754277/547_1.pdf

Reference13 articles.

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2. Xu, J., and Tsuchiyama, R., 2003, “Ultra-Low-Flying-Height Design From the Viewpoint of Contact Vibration,” Tribol. Int., 36, pp. 459–466.

3. Burgdorfer, B. , 1959, “The Influence of the Molecular Mean Free Path on the Performance of Hydrodynamic Gas Lubricated Bearings,” ASME J. Basic Eng., 81, pp. 99–100.

4. Hsia, Y. T., and Domoto, G. A., 1983, “An Experimental Investigation of Molecular Rarefaction Effects in Gas Lubricated Bearings at Ultra-Low Clearances,” ASME J. Tribol., 105, pp. 120–130.

5. Fukui, S., and Kaneko, R., 1988, “Analysis of Ultra-Thin Gas Film Lubrication Based on Linearized Boltzmann Equation: First Report-Derivation of a Generalized Lubrication Equation Including Thermal Creep Flow,” ASME J. Tribol., 110, pp. 253–262.

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