Effect of Surface Roughness on Rate-Dependent Slip in Simple Fluids

Authors

Nikolai V. Priezjev, Wright State University - Main CampusFollow

Document Type

Article

Publication Date

10-10-2007

Abstract

Molecular dynamics simulations are used to investigate the influence of molecular-scale surface roughness on the slip behavior in thin liquid films. The slip length increases almost linearly with the shear rate for atomically smooth rigid walls and incommensurate structures of the liquid/solid interface. The thermal fluctuations of the wall atoms lead to an effective surface roughness, which makes the slip length weakly dependent on the shear rate. With increasing the elastic stiffness of the wall, the surface roughness smoothes out and the strong rate dependence is restored again. Both periodically and randomly corrugated rigid surfaces reduce the slip length and its shear rate dependence.

Comments

The download link is to a pre-print edition of the article.

Repository Citation

Priezjev, N. V. (2007). Effect of Surface Roughness on Rate-Dependent Slip in Simple Fluids. The Journal of Chemical Physics, 127, 144708.
https://corescholar.libraries.wright.edu/mme/456

DOI

10.1063/1.2796172