Assessment of volume of fluid and immersed boundary methods for droplet computations
2004 (English)In: International Journal for Numerical Methods in Fluids, ISSN 0271-2091, E-ISSN 1097-0363, Vol. 46, no 2, 109-125 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2004. Vol. 46, no 2, 109-125 p.
interfacial flow, surface tension, volume of fluid, immersed boundary, VOF, IB, viscous incompressible flows, cartesian grid method, surface-tension, numerical-analysis, tracking, dynamics
IdentifiersURN: urn:nbn:se:kth:diva-23684ISI: 000223581500001OAI: oai:DiVA.org:kth-23684DiVA: diva2:342383
QC 201005252010-08-102010-08-10Bibliographically approved