Calculation of viscous EHL traction for squalane using molecular simulation and rheometry

Scott Bair*, Clare McCabe, Peter T. Cummings

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)

Abstract

Recently, remarkable agreement was reported between nonequilibrium molecular dynamics simulation and high-pressure Couette rheometry on squalane. We have utilized the viscosity-strain rate relationship obtained from this unique combination of experimental and simulation data along with high-pressure viscometer measurements to calculate the viscous traction curve in the elastohydrodynamic lubrication (EHL) regime. A comparison with measured traction at 0.57 and 1.29GPa shows excellent agreement, confirming the validity of the measurements and simulations. Thus, we present for the first time, a successful calculation of EHL traction from the liquid shear response obtained from both molecular dynamics and rheometry.

Original languageEnglish
Pages (from-to)251-254
Number of pages4
JournalTribology Letters
Volume13
Issue number4
DOIs
Publication statusPublished - Nov 2002

Keywords

  • EHL traction
  • Elastohydrodynamics
  • High-pressure rheology
  • Nonequilibrium molecular dynamics simulation
  • Shear-thinning

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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