The efficient and accurate solution of continuous thin film flow over surface patterning and past occlusions

Y. C. Lee, H. M. Thompson, P. H. Gaskell

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)

Abstract

The benefits of a spatially and time-adaptive full approximation storage (FAS) multigrid method for the solution of the thin film lubrication equations, as used to model gravity-driven flow over complex submerged topography and past small-scale occlusions, are investigated. Results are presented which demonstrate how flow orientation has a significant effect on the magnitude of the resultant free-surface disturbances and how reduction of the in-plane dimensions of the associated topography increases the computational resources needed to achieve grid-independent solutions. In addition, the ability to automatically restrict fine rid resolution only to those regions in and around small, localized topography is shown to lead to significantly increased Computational efficiency over grid-independent solutions obtained on globally fine meshes with the same degree of accuracy. Copyright (C) 2007 John Wiley & Sons, Ltd.

Original languageEnglish
Pages (from-to)1375-1381
Number of pages7
JournalInternational Journal for Numerical Methods in Fluids
Volume56
Issue number8
DOIs
Publication statusPublished - 20 Mar 2008

Keywords

  • finite difference methods
  • differential equations
  • adaptivity
  • mesh adaptation
  • free surface
  • micro-fluids
  • thin film flow
  • multigrid
  • surface patterning
  • LIQUID-FILMS

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