Inertia effects in evaluating dynamic coefficients for thick lubricant film

Junho Seo, Moonho Choi, Yoonchul Rhim

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In general, the dynamic coefficients of a journal or a thrust bearing are evaluated by applying the perturbation method to the steady state Reynolds equation. Since the Reynolds equation neglects the inertia of the lubricant in a thin film, the dynamic coefficients for the thick film must be evaluated in a different way. In this study, the dynamic coefficients evaluated by a CFD package and experiments are compared to those evaluated by applying the perturbation method to the Reynolds equation for the thick fluid film. A disk damper of an HDD is used to evaluate the dynamic coefficients experimentally. The difference of the dynamic coefficients obtained in a different way becomes larger with the thickness of the fluid film due to the inertia of the lubricant in the film.

Original languageEnglish
Title of host publication2012 Digest APMRC - Asia-Pacific Magnetic Recording Conference
Subtitle of host publicationA Strong Tradition. An Exciting New Look!
Publication statusPublished - 2012 Dec 1
Event2012 Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look!, APMRC 2012 - Singapore, Singapore
Duration: 2012 Oct 312012 Nov 2

Other

Other2012 Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look!, APMRC 2012
CountrySingapore
CitySingapore
Period12/10/3112/11/2

Fingerprint

Lubricants
Reynolds equation
Thrust bearings
Fluids
Thick films
Computational fluid dynamics
Thin films
Experiments

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials

Cite this

Seo, J., Choi, M., & Rhim, Y. (2012). Inertia effects in evaluating dynamic coefficients for thick lubricant film. In 2012 Digest APMRC - Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look! [6407543]
Seo, Junho ; Choi, Moonho ; Rhim, Yoonchul. / Inertia effects in evaluating dynamic coefficients for thick lubricant film. 2012 Digest APMRC - Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look!. 2012.
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Seo, J, Choi, M & Rhim, Y 2012, Inertia effects in evaluating dynamic coefficients for thick lubricant film. in 2012 Digest APMRC - Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look!., 6407543, 2012 Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look!, APMRC 2012, Singapore, Singapore, 12/10/31.

Inertia effects in evaluating dynamic coefficients for thick lubricant film. / Seo, Junho; Choi, Moonho; Rhim, Yoonchul.

2012 Digest APMRC - Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look!. 2012. 6407543.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Seo J, Choi M, Rhim Y. Inertia effects in evaluating dynamic coefficients for thick lubricant film. In 2012 Digest APMRC - Asia-Pacific Magnetic Recording Conference: A Strong Tradition. An Exciting New Look!. 2012. 6407543