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Related Experiment Videos

Einstein's Viscosity Equation for Nanolubricated Friction.

Alexander Breki1, Michael Nosonovsky2

  • 1Department of Machine Design , Peter the Great St. Petersburg Polytechnic University , 29 Polytechnicheskaya Street , St. Petersburg 195251 , Russia.

Langmuir : the ACS Journal of Surfaces and Colloids
|October 9, 2018
PubMed
Summary

A new nanofriction law for nanofluid lubricants was developed. This equation accurately predicts friction coefficients in various bearings, validated by experiments with WS2 nanoparticle-enhanced oils.

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Area of Science:

  • Tribology
  • Nanotechnology
  • Materials Science

Background:

  • The viscosity of nanofluids is described by the generalized Einstein equation.
  • Lubricant viscosity directly influences the coefficient of friction in hydrodynamic lubrication.

Purpose of the Study:

  • To formulate a new equation for the coefficient of friction in nanofluid lubrication.
  • To validate this equation for different bearing types and experimental data.

Main Methods:

  • Applied the generalized Einstein equation to nanofluid viscosity.
  • Derived a friction coefficient equation based on viscosity.
  • Tested the equation's validity on journal, rolling, and ball bearings.

Main Results:

Related Experiment Videos

  • Presented a novel equation for nanofluid lubrication friction.
  • Demonstrated the equation's applicability across various bearing types.
  • Achieved experimental agreement within 7% accuracy using WS2 nanoparticle-enhanced oil.

    • Conclusions:

    • The proposed equation represents a new law of nanofriction.
    • Nanofluid lubrication offers predictable friction reduction in mechanical systems.