Journal
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
Volume 143, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijheatmasstransfer.2019.118565
Keywords
VOSET; Free surface flow; Unstructured grid; Convex polygon
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Funding
- China Postdoctoral Science Foundation [2018M6333506]
- Foundation for Innovative Research Groups of the National Natural Science Foundation of China [51721004]
- 111 Project [1316038]
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This article presents an extension of coupled volume-of-fluid and level-set method (VOSET) for simulating free surfaces flows in arbitrary 2D polygon meshes. A series of techniques are introduced for geometric calculations in convex polygons. Newton iteration is adopted for the interface reconstruction in polygons, and incremental remapping approach is employed for the propagation of the volume fractions. The interface tracking test results suggested a second order accuracy in mixed and hexagonal grids. For the validation purpose, a Rayleigh-Taylor instability problem, a liquid column collapse problem and a single bubble rising problem were numerically studied, and the obtained results show excellent agreements with experimental data and benchmark solutions in literatures. Finally the proposed VOSET method was applied in simulating the working process of a flow-focusing microfluidic droplet generator. (C) 2019 Elsevier Ltd. All rights reserved.
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