Lubrication–Contact Interface Conditions and Novel Mixed/Boundary Lubrication Modeling Methodology

Shuangbiao Liu*, Q. Jane Wang, Yip Wah Chung, Stephen Berkebile

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Under severe conditions, solid contacts take place even when parts are lubricated. Precise mathematical conditions are needed to describe the interior interface between fluid lubrication and solid-contact zones. In order to distinguish the conditions for this interface from conventional lubrication boundary conditions, they are named lubrication–contact interface conditions (LCICs). In this work, mathematical LCICs are derived with local flow continuity from the continuum mechanics point of view and pressure inequality across the interface. Numerical implementations are developed and tested with problems having simple geometries and configurations, and they are integrated into a new mixed/boundary elastohydrodynamic lubrication solver that uses a new method to determine solid-contact pressures. This solver is capable of capturing film thickness and pressure behaviors involving solid contacts.

Original languageEnglish (US)
Article number164
JournalTribology Letters
Issue number4
StatePublished - Dec 2021


  • Boundary lubrication
  • EHL
  • Lubrication–contact interface conditions
  • Mixed lubrication

ASJC Scopus subject areas

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


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