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

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Author

  • Daniel Lörstad
  • M Francois
  • W Shyy
  • Laszlo Fuchs

Summary, in English

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.

Publishing year

2004

Language

English

Pages

109-125

Publication/Series

International Journal for Numerical Methods in Fluids

Volume

46

Issue

2

Document type

Journal article

Publisher

John Wiley & Sons Inc.

Topic

  • Energy Engineering
  • Fluid Mechanics and Acoustics

Keywords

  • VOF
  • immersed boundary
  • volume of fluid
  • interfacial flow
  • surface tension
  • IB

Status

Published

ISBN/ISSN/Other

  • ISSN: 1097-0363