Effects of electrodouble layer (EDL) and surface roughness on lubrication theory

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9 Citations (Scopus)


The effects of surface roughness on the electrohydrodynamic lubrication with thin EDL are considered for the sliding of one charged body past another in an electrolyte solution. The apparent viscosity of the lubricating film with thin EDL and the average flow model are incorporated to derive the averaged Reynolds type equation as well as the related flow factors. The coupled effects of surface roughness and EDL on flow factors are discussed. The hydrodynamic pressure generated by the viscous force and electrokinetic force are discussed for an 1-D slider bearing. The results show that the existence of EDL resists the flow. The flow factors with EDL effects depart from those with no EDL effect significantly. As the EDL effect increases, the "enhanced flow" due to roughness is retarded, the "restricted flow" due to roughness is increased, and the load carrying capacities increase significantly.

Original languageEnglish
Pages (from-to)53-61
Number of pages9
JournalTribology Letters
Issue number1
Publication statusPublished - 2005 Jan 1

All Science Journal Classification (ASJC) codes

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


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