Calculation of EHL Traction for a Model Hydrocarbon Using Molecular Simulation and Rheometry

  • Bair, Scott (Center for High-Pressure Rheology George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology) ;
  • McCabe, Clare (Department of Chemical Engineering Colorado School of Mines) ;
  • Cummings, Peter T. (University of Tennessee) ;
  • Winer, Ward O. (George W. Woodruff School of Mechanical Engineering Georgia Institute of Technology)
  • Published : 2002.10.21

Abstract

Recently, remarkable agreement has been reported between nonequilibrium molecular dynamics simulation and high-pressure Couette rheometry on squalane. We utilized the parameters obtained from this unique collaboration along with high-pressure viscometer measurements to calculate the elastohydrodynamic traction curve. A comparison with measured traction at 1.29 GPa shows excellent agreement, confirming the validity of the measurements and simulations. It should no longer be necessary to invoke a different rheological response to explain film thickness and traction.

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