Effect of solid properties on slip at a fluid-solid interface

Amir Alizadeh Pahlavan and Jonathan B. Freund
Phys. Rev. E 83, 021602 – Published 7 February 2011

Abstract

The dependence of velocity slip at a liquid–solid interface upon the character of the solid is studied using atomistic simulation methods for Lennard-Jones model systems. The effect of the thermostatting mechanisms, often used in such simulations, is also investigated. The solid atom vibrational frequency is shown not to have a significant effect on the slip length for the range of parameters investigated; however, it is found that application of a thermostat to the fluid changes the slip length at low shear rates and results in an unphysical divergent slip behavior at high shear rates. On the other hand, removing the generated heat through the walls, which is more analogous to a laboratory condition, results in a nonlinearly decreasing slip length with shear rate that asymptotes to the no-slip limit at high shear rates. This effect is due to viscous heating, which increases the fluid temperature and pressure. A nonlinear relationship between the slip length and the shear rate collapses the shear-rate–slip-length dependence onto a single curve for a range of cases when heat is more realistically removed through the walls.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 12 August 2010

DOI:https://doi.org/10.1103/PhysRevE.83.021602

©2011 American Physical Society

Authors & Affiliations

Amir Alizadeh Pahlavan and Jonathan B. Freund*

  • Mechanical Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA

  • *jbfreund@illinois.edu; also Aerospace Engineering

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 83, Iss. 2 — February 2011

Reuse & Permissions
Access Options
CHORUS

Article Available via CHORUS

Download Accepted Manuscript
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review E

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×