Effect of configuration of micro-/nanoscale structure on sliding surface on molecular gas-film lubrication

Susumu Isono, Masashi Yamaguchi, Shigeru Yonemura, Takanori Takeno, Hiroyuki Miki, Toshiyuki Takagi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Nakamori et al. found experimentally that the friction between a partly polished diamond coating and a metal surface was drastically reduced to zero as relative speed increased to a few m/s [Diamond Relat. Mater. 14, (2005), 2122]. It seems that diamond coating took off the counter surface because sliding was noiseless in their experiment. However, the mechanism of this phenomenon was unknown. In the previous work, we performed the numerical simulation of micro-/nanoscale gas flow between two sliding surfaces, i. e., the slider surface with microscale surface roughness like partly polished diamond coating and the flat counter surface. And then, we successfully reproduced lift force large enough to suspend the slider used in the experiment and found that this effect became notable only for micro-/nanoscale gas flow. In the present paper, we investigate the effect of configuration of micro-/nanoscale structure on sliding surface on molecular gas-film lubrication. Since micro-/nanoscale gas flows between two sliding surfaces cannot be treated as a continuum, we use the direct simulation Monte Carlo (DSMC) method.

Original languageEnglish
Title of host publication27th International Symposium on Rarefied Gas Dynamics - 2010, RGD27
Pages736-741
Number of pages6
EditionPART 1
DOIs
Publication statusPublished - 2011
Event27th International Symposium on Rarefied Gas Dynamics, RGD27 - Pacific Grove, CA, United States
Duration: 2011 Jul 102011 Jul 15

Publication series

NameAIP Conference Proceedings
NumberPART 1
Volume1333
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other27th International Symposium on Rarefied Gas Dynamics, RGD27
CountryUnited States
CityPacific Grove, CA
Period11/7/1011/7/15

Keywords

  • DSMC method
  • Diamond coating
  • Micro-nanoscale flow
  • Molecular gas-film lubrication

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Isono, S., Yamaguchi, M., Yonemura, S., Takeno, T., Miki, H., & Takagi, T. (2011). Effect of configuration of micro-/nanoscale structure on sliding surface on molecular gas-film lubrication. In 27th International Symposium on Rarefied Gas Dynamics - 2010, RGD27 (PART 1 ed., pp. 736-741). (AIP Conference Proceedings; Vol. 1333, No. PART 1). https://doi.org/10.1063/1.3562734