Behavior of a micron-sized air bubble in operating FDBs using the discrete phase modeling method

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• 作者：Yeonha Jung (1)
  Gunhee Jang (1)
  Kyungmoon Jung (1)
  Chiho Kang (1)
  Hyunho Shin (2)
  
• 刊名：Microsystem Technologies
• 出版年：2014
• 出版时间：August 2014
• 年：2014
• 卷：20
• 期：8-9
• 页码：1511-1521
• 全文大小：2,224 KB
• 参考文献：1. Asada T, Saito H, Asaida Y, Itoh K (2001) Characteristic analysis of hydrodynamic bearings for HDDs. IEEE Trans Magn 37:810-14 CrossRef
  2. FLUENT 6.3 User’s Guide (2006)
  3. Jang GH, Lee SH, Kim HW (2006) Finite element analysis of the coupled journal and thrust bearing in a computer hard disk drive. J Tribol 128:335-40 CrossRef
  4. Jung KM, Lee JH, Jung YH, Jang HK, Jang GH (2013) Behavior analysis of air bubbles in the oil lubricant of FDBs at low speed operating conditions. Microsyst Technol 19:1475-482 CrossRef
  5. Tomiyama A, Zun I, Sou A, Sakaguchi T (1993) Numerical analysis of bubble motion with the VOF method. Nucl Eng Des 141:69-2 CrossRef
  6. Van Honschoten JW, Tas NR, Elwenspoek M (2010) The profile of a capillary liquid bridge between solid surfaces. Am J Phys 78:277-86 CrossRef
  
• 作者单位：Yeonha Jung (1)
  Gunhee Jang (1)
  Kyungmoon Jung (1)
  Chiho Kang (1)
  Hyunho Shin (2)
  
  1. Department of Mechanical Engineering, Hanyang University, 17 Haengdang-Dong, Seongdong-Gu, Seoul, 133-791, Korea
  2. Samsung Electro-Mechanics Co. Ltd., 314, Maetan 3-Dong, Yeongtong-Gu, Suwon, Gyeonggi, 443-743, Korea
  
• ISSN：1432-1858

文摘

This paper investigates the motion of a micron-sized air bubble in the operating fluid dynamic bearings (FDBs) of a spindle motor in a computer hard disk drive. The flow field of FDBs is calculated by solving the Navier–Stokes equation and the continuity equation. The two-phase flow in the air-oil interface is simultaneously solved by using the finite volume method and the volume of fluid (VOF) method. We then analyze the motion of a micron-sized air bubble by applying the discrete phase modeling (DPM) method to the calculated flow field of FDBs. The motion of a micron-sized air bubble determined using the DPM method is verified by comparison with the trajectory of the micron-sized air bubble determined using the VOF method. The trajectories of a micron-sized air bubble with different initial positions in the FDBs are discussed.