An average lubrication equation for thin film grain flow with surface roughness effects

Hung Jung Tsai, Yeau-Ren Jeng

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A closed-form average lubrication equation for thin film grain flow with the effects of surface roughness is derived. This equation is based on Haff's grain flow theory and also the flow factors proposed by Patir and Cheng. The flow factors, derived by the perturbation approach and coordinate transformation, are expressed in terms of surface characteristics (three characteristics for each surface: roughness orientation, Peklenik number and standard derivation) and particle size. Finally, the flow factors under different surface characteristics and particle size are discussed.

Original languageEnglish
Pages (from-to)736-742
Number of pages7
JournalJournal of Tribology
Volume124
Issue number4
DOIs
Publication statusPublished - 2002 Oct 1

All Science Journal Classification (ASJC) codes

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

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