Molecular thermal phenomena in an ultrathin lubrication liquid film of linear molecules between solid surfaces

Taku Ohara, Daichi Torii

Research output: Contribution to journalArticlepeer-review

13 Citations (Scopus)

Abstract

Molecular dynamics simulation has been performed on an ultra-thin lubrication liquid film, where the liquid film of diatomic molecules having a thickness of molecular scale (several nanometers) is sheared by two parallel solid walls moving at different speeds. The Couette-like flow is generated and energy conversion from the macroscopic flow energy to thermal energy, which is the viscous heating in a macroscopic sense, occurs in the liquid film. It was observed in the present simulations that the thermal phenomena in the liquid film are far from the macroscopically expected ones; thermal energy is not distributed evenly to each degree of freedom of molecular motion, and energy transfer in the liquid adjacent to the solid surface is contributed by molecular motion in a manner different from those in a bulk liquid.

Original languageEnglish
Pages (from-to)265-279
Number of pages15
JournalMicroscale Thermophysical Engineering
Volume9
Issue number3
DOIs
Publication statusPublished - 2005 Jul 1

Keywords

  • Energy and momentum transfer
  • Molecular dynamics simulation
  • Sheared liquid films
  • Solid-liquid interface

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science (miscellaneous)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy (miscellaneous)

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