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TECHNICAL PAPERS

Particle Flow and Contamination in Slider Air Bearings for Hard Disk Drives

[+] Author and Article Information
Xinjiang Shen, David B. Bogy

Computer Mechanics Laboratory, Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA 94720

J. Tribol 125(2), 358-363 (Mar 19, 2003) (6 pages) doi:10.1115/1.1537746 History: Received February 26, 2002; Online March 19, 2003; Revised August 06, 2006
Copyright © 2003 by ASME
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References

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Saffman,  P. G., 1965, “The Lift on a Small Sphere in A Slow Shear Flow,” J. Fluid Mech., 22, pp. 385–400.
Zhang, S., 1997, “Numerical Investigation of Particle Contamination and Thermal Effects in a Slider Disk Interface,” Doctoral Dissertation, Department of Mechanical Engineering, University of California, Berkeley, CA.
Zhang, S., and Bogy, D. B., 1996, “Effects of Lift on the Motion of Particles in the Recessed Regions of a Slider,” CML Technical Report, No. 96-016, Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA.
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Cha,  E. T., and Bogy,  D. B., 1995, “A Numerical Scheme for Static and Dynamic Simulation of Sub ambient Pressure Shaped Rail Sliders,” ASME J. Tribol., 117, pp. 36–46.
Lu, S., and Bogy, D. B., 1994, “A Multi-Grid Control Volume Method for the Simulation of Arbitrarily Shaped Slider Air Bearing with Multiple Recess Levels,” CML Technical Report, No. 94-016, Department of Mechanical Engineering, University of California at Berkeley, Berkeley, CA.

Figures

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Two-dimensional rails of the slider
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Pressure profile of the air bearing for the slider
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Flying height contour of the slider
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Effects of particle sizes on its flying path in the air bearing
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Effects of density on the flying path of the particle in the air bearing
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Particle sizes of Gaussian distribution, mean size=30 nm
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(a) Time-dependent three-dimensional particle distributions in the air bearing; and (b) time-dependent three-dimensional distributions in the air bearing
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Particle contamination profile on one slider surface (FH=25.6 nm, Pitch 75 μrad, Roll=−1.79 μrad)
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Effect of the density of the particle on the particle contamination behavior on slider surfaces: (a) density=1.0 E3 kg/m3; and (b) density=7.8 E3 kg/m3
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Effect of pitch angles on particle contamination behavior on slider surfaces: (a) FH=21.5 nm, Pitch 66.9 μrad, Roll=5.5 μrad; and (b) FH=20.1 nm, Pitch 84.9 μrad, Roll=−5 μrad

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