Assessment of volume of fluid and immersed boundary methods for droplet computations

Research output: Contribution to journalArticle

Abstract

The volume of fluid (VOF) and immersed boundary (IB) methods are two popular computational techniques for multi-fluid dynamics. To help shed light on the performance of both techniques, we present accuracy assessment, which includes interfacial geometry, detailed and global fluid flow characteristics, and computational robustness. The investigation includes the simulations of a droplet under static equilibrium as a limiting test case and a droplet rising due to gravity for Re less than or equal to 1000. Surface tension force models are key issues in both VOF and IB and alternative treatments are examined resulting in improved solution accuracy. A refined curvature model for VOF is also presented. With the newly developed interfacial treatments incorporated, both IB and VOF perform comparably well for the droplet dynamics under different flow parameters and fluid properties.

Details

Authors
  • Daniel Lörstad
  • M Francois
  • W Shyy
  • Laszlo Fuchs
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Energy Engineering
  • Fluid Mechanics and Acoustics

Keywords

  • VOF, immersed boundary, volume of fluid, interfacial flow, surface tension, IB
Original languageEnglish
Pages (from-to)109-125
JournalInternational Journal for Numerical Methods in Fluids
Volume46
Issue number2
Publication statusPublished - 2004
Publication categoryResearch
Peer-reviewedYes