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Behavior analysis of air bubbles in the oil lubricant of FDBs at low speed operating conditions

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Abstract

This paper investigated the behavior of the air bubbles and the air–oil interface of FDBs at low speed operating conditions by using a two-phase flow analysis of air and oil to study the expelling mechanism of air bubbles in the operation of FDBs. The two-phase flow of air and oil was analyzed using the three-dimensional Navier–Stokes equation and the volume of fluid method of multi-phase flow. The proposed numerical method was verified by the experimental results. The effects of the depth and area of the groove near the outlet on the behavior of the air bubbles and the air–oil interface were also studied. This research shows that the groove near the outlet is responsible for the concave shape of the air–oil interface as a result of surface tension, and that air bubbles are expelled into the outside air when an air bubble meets the concave air–oil interface.

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References

  • Asada T, Saito H, Asaida Y, Itoh K (2002) Design of hydrodynamic bearings for high-speed HDD. Microsyst Technol 8:220–226

    Article  Google Scholar 

  • Asada T, Saitou H, Itou D (2005) Design of hydrodynamic bearing for mobile hard disk drives. IEEE Trans Magn 41:741–743

    Article  Google Scholar 

  • FLUENT 6.3 User’s guide (2006)

  • Jung KM, Jang GH (2011) Axial shock-induced motion of the air–oil interface of fluid dynamic bearings of a non-operating hard disk drive. IEEE Trans Magn 47:1911–1917

    Article  Google Scholar 

  • Jung KM, Jang GH, Kim JH (2012) Behavior of fluid lubricant and air–oil interface of operating FDBs due to operating condition and seal design. Microsyst Technol 18:1373–1381

    Article  Google Scholar 

  • Van Honschoten JW, Tas NR, Elwenspoek M (2010) The profile of a capillary liquid bridge between solid surfaces. Am J Phys 78:277–286

    Article  Google Scholar 

Download references

Acknowledgments

This work was supported by Samsung Electro-Mechanics Co. Ltd. and by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2010-0021919).

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Authors and Affiliations

  1. Department of Mechanical Engineering, Hanyang University, 17 Haengdang-Dong, Seongdong-Gu, Seoul, 133-791, Korea

    Kyungmoon Jung, Jihoon Lee, Yeonha Jung, Hokyung Jang & Gunhee Jang

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  1. Kyungmoon Jung
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  2. Jihoon Lee
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  3. Yeonha Jung
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  4. Hokyung Jang
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  5. Gunhee Jang
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Correspondence to Gunhee Jang.

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Jung, K., Lee, J., Jung, Y. et al. Behavior analysis of air bubbles in the oil lubricant of FDBs at low speed operating conditions. Microsyst Technol 19, 1475–1482 (2013). https://doi.org/10.1007/s00542-013-1842-8

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  • DOI: https://doi.org/10.1007/s00542-013-1842-8

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