Generalized effects in confined fluids: New friction map for boundary lubrication

Gustavo Luengo, Jacob Israelachvili, Steve Granick

Research output: Contribution to journalArticlepeer-review


Recent advances in measuring the rheology and tribology of thin liquid films between shearing surfaces have enabled previously-inaccessible parameters to be measured accurately during fractional sliding. These include the real area of contact, the local asperity load and pressure, and the sheared film thickness. The results show striking non-continuum, non-bulk like effects when the thicknesses of sheared films approach molecular dimensions as occurs under most tribological conditions. Based on these new results, we assess the validity of current presentations of friction processes, such as the Stribeck curve, and propose new constitutive relations and a dynamic friction map, including an alternative Stribeck type curve representation, which are also formulated in terms of more accessible parameters.

Original languageEnglish (US)
Pages (from-to)328-335
Number of pages8
Issue number1-2
StatePublished - Dec 1 1996
Externally publishedYes


  • Frictional sliding
  • Polymeric fluids
  • Rheological behavior
  • Thin liquid films

ASJC Scopus subject areas

  • General Engineering
  • Mechanical Engineering
  • Surfaces, Coatings and Films


Dive into the research topics of 'Generalized effects in confined fluids: New friction map for boundary lubrication'. Together they form a unique fingerprint.

Cite this