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Motions of Air Bubbles Trapped in Grooved and Plane Journal Bearings of Operating Fluid Dynamic Bearings
- Issue Date
- Jun-2013
- Publisher
- Institute of Electrical and Electronics Engineers
- Keywords
- Air bubble; fluid dynamic bearings (FDBs); journal bearing; two-phase flow
- Citation
- IEEE Transactions on Magnetics, v.49, no.6, pp 2433 - 2436
- Pages
- 4
- Indexed
- SCI
SCIE
SCOPUS
- Journal Title
- IEEE Transactions on Magnetics
- Volume
- 49
- Number
- 6
- Start Page
- 2433
- End Page
- 2436
- ISSN
- 0018-9464
1941-0069
- Abstract
- We investigated the motion of air bubbles trapped in grooved and plane journal bearings of operating fluid dynamic bearings (FDBs) by using the finite volume method and the volume of fluid method. The motion of a trapped air bubble in grooved journal bearing is mostly determined by surface tension and the pressure difference due to the wedge effect of the groove. Also, the motion of trapped air bubbles in plane journal bearing is mostly determined by surface tension and the Coutte flow. A novel design of FDBs was finally proposed to expel the air bubbles trapped in grooved journal and plane journal bearings out of operating FDBs.
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