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TECHNICAL PAPERS

Spreading Characteristics of Molecularly Thin Lubricant on Surfaces With Groove-Shaped Textures: Monte Carlo Simulation and Measurement Using PFPE Film

[+] Author and Article Information
Hedong Zhang, Yasunaga Mitsuya, Maiko Yamada

Nagoya University, Department of Electronic- Mechanical Engineering, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan

J. Tribol 124(3), 575-583 (May 31, 2002) (9 pages) doi:10.1115/1.1456085 History: Received March 19, 2001; Revised August 15, 2001; Online May 31, 2002
Copyright © 2002 by ASME
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References

Figures

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Example of light intensity curve
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Lubricant spreading on grooved surface of disk A: (a) 5 min; and (b) 24 h after dripping.
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Lubricant spreading on grooved surface of disk B: (a) 12 min; and (b) 24.2 h after dripping.
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Lengths of axes versus time
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Spreading distance squared versus time
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Interactions between a molecular and solid surface: (a) on plane; and (b) around corner.
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Spreading of non-polar lube on smooth surface: (a) coupling constants (J/kBT=2 and A/J=200); and (b) coupling constants (J/kBT=2 and A/J=2.5).
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Spreading on non-polar lube inside a groove (b=10,d=5): (a) coupling constants (J/kBT=2 and A/J=200); and (b) coupling constants (J/kBT=2 and A/J=2.5).
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Spreading profiles of non-polar lube inside a groove: (a) coupling constants (J/kBT=2 and A/J=200); and (b) coupling constants (J/kBT=2 and A/J=2.5).
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Comparison between spreading profiles of lubricant inside grooves with different widths
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Effect of groove depth for J/kBT=2 and A/J=200: (a) spreading distance versus time; and (b) spreading distance squared versus time.
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Effect of groove depth for J/kBT=2 and A/J=2.5: (a) spreading distance versus time; and (b) spreading distance squared versus time.
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Configurations of experimental disks (unit: μm): (a) disk A, and (b) disk B.
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Lubricant spreading on grooved surface of disk B: (a) 4 min; and (b) 24 h after dripping.
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Spreading distance versus time on grooved surface of disk B

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