期刊
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
卷 125, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijmultiphaseflow.2020.103209
关键词
Curvature; Surface tension; Volume-of-fluid; Particles; Coalescence
类别
资金
- Swiss National Science Foundation [CRSII5_173860]
- CSCS [s754, s931]
- Swiss National Science Foundation (SNF) [CRSII5_173860] Funding Source: Swiss National Science Foundation (SNF)
We present a particle method for estimating the curvature of interfaces in volume-of-fluid simulations of multiphase flows. The method is well suited for under-resolved interfaces, and it is shown to be more accurate than the parabolic fitting that is employed in such cases. The curvature is computed from the equilibrium positions of particles constrained to circular arcs and attracted to the interface. The proposed particle method is combined with the method of height functions at higher resolutions, and it is shown to outperform the current combinations of height functions and parabolic fitting. The algorithm is conceptually simple and straightforward to implement on new and existing software frameworks for multiphase flow simulations thus enhancing their capabilities in challenging flow problems. We evaluate the proposed hybrid method on a number of two- and three-dimensional benchmark flow problems and illustrate its capabilities on simulations of flows involving bubble coalescence and turbulent multiphase flows. (C) 2020 Elsevier Ltd. All rights reserved.
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