Deformation Behavior of Thin Lubricant Films at Elevated Pressure

Abstract

If care is taken to avoid viscous heating, the results from rheometers may be used to generate empirical rate equations which are useful in modelling EHD traction. However, an analytical treatment of piezo-viscous liquids reveals the Reynolds equation adequately captures the mechanics of the piezo-viscous liquid only when the shear stress is much less than the reciprocal of the pressure viscosity coefficient. Otherwise the cross film pressure gradient cannot be neglected and secondary flows result.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1998
Accession Number
ADA336053

Entities

People

  • Scott Bair

Organizations

  • Georgia Tech

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Barometric Pressure
  • Coefficients
  • Constitutive Equations
  • Differential Equations
  • Equations
  • Flow
  • High Pressure
  • Lubricants
  • Measurement
  • Mechanics
  • Navier Stokes Equations
  • Pressure Distribution
  • Pressure Gradients
  • Secondary Flow
  • Shear Stresses
  • Specific Heat
  • Viscosity

Readers

  • Computational Modeling and Simulation
  • Fluid Dynamics.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).