Thermal, Squeezing and compressibility effects in lubrication of asymmetric rollers

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Abstract

Hydrodynamically heavily loaded rigid cylindrical rollers, lubricated by a thin compressible fluid film, are investigated for normal squeezing motion and cavitations. The lubricant is assumed to follow the non-Newtonian power-law fluid model where consistency and density of the lubricant vary with one dimensional pressure and temperature. The modified Reynolds pressure equation and thermal energy equation are derived and solved simultaneously by R-K Fehlberg method. Secant method is also applied in order to enforce the boundary condition at the outlet. It is observed that temperature has significant effects on consistency and density both. It is also to be noted that compressibility effect is even more significant when squeezing is taken into account.

Original languageEnglish (US)
Pages (from-to)244-258
Number of pages15
JournalTribology in Industry
Volume36
Issue number3
Publication statusPublished - 2014

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Keywords

  • Consistency
  • Hydrodynamic lubrication
  • Non-Newtonian
  • Power law
  • Squeezing Compressibility
  • Thermal effects

ASJC Scopus subject areas

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

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