Boundary slip dependency on surface stiffness

Nikolaos Asproulis, Dimitris Drikakis

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Abstract

The paper investigates the effects of surface stiffness on the slip process aiming to obtain a better insight of the momentum transfer at nanoscale. The surface stiffness is modeled through the stiffness, κ, of spring potentials, which are employed to construct the thermal walls. It is shown that variations of stiffness, κ, influence the slip mechanism either toward slip or stick conditions. Increasing the values of κ alters the oscillation frequency and the mean displacement of the wall particles toward higher and lower values, respectively. Our results suggest that the amount of slip produced as a function of stiffness follows a common pattern that can be modeled through a fifth-order polynomial function.
Original languageEnglish
Article number061503
Number of pages5
JournalPhysical Review E
Volume81
Issue number6
DOIs
Publication statusPublished - 24 Jun 2010

Keywords

  • boundary slip
  • mean displacement
  • nano scale
  • order polynomials
  • oscillation frequency
  • slip mechanism
  • surface stiffness
  • thermal walls
  • stiffness

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