Contact line dynamics in binary lattice Boltzmann simulations

C. M. Pooley*, H. Kusumaatmaja, J. M. Yeomans

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We show that, when a single relaxation time lattice Boltzmann algorithm is used to solve the hydrodynamic equations of a binary fluid for which the two components have different viscosities, strong spurious velocities in the steady state lead to incorrect results for the equilibrium contact angle. We identify the origins of these spurious currents and demonstrate how the results can be greatly improved by using a lattice Boltzmann method based on a multiple-relaxation-time algorithm. By considering capillary filling we describe the dependence of the advancing contact angle on the interface velocity.

Original languageEnglish
Article number056709
Number of pages9
JournalPhysical Review E - Statistical, Nonlinear and Soft Matter Physics
Volume78
Issue number5
DOIs
Publication statusPublished - Nov 2008

Keywords

  • SUPERHYDROPHOBIC SURFACES
  • FLOW
  • DROPLETS
  • MODEL

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