Simulations of slip flow on nanobubble-laden surfaces

J Phys Condens Matter. 2011 May 11;23(18):184106. doi: 10.1088/0953-8984/23/18/184106. Epub 2011 Apr 20.

Abstract

On microstructured hydrophobic surfaces, geometrical patterns may lead to the appearance of a superhydrophobic state, where gas bubbles at the surface can have a strong impact on the fluid flow along such surfaces. In particular, they can strongly influence a detected slip at the surface. We present two-phase lattice Boltzmann simulations of a flow over structured surfaces with attached gas bubbles and demonstrate how the detected slip depends on the pattern geometry, the bulk pressure, or the shear rate. Since a large slip leads to reduced friction, our results give assistance in the optimization of microchannel flows for large throughput.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Algorithms
  • Biomechanical Phenomena
  • Biophysics / methods
  • Computer Simulation
  • DNA / chemistry*
  • Microbubbles
  • Microfluidics
  • Models, Statistical
  • Models, Theoretical
  • Molecular Conformation
  • Nanotechnology / methods*
  • Surface Properties

Substances

  • DNA