Development of a single-phase free-surface flow model with the improved lattice kinetic scheme
Computers & Mathematics with Applications, ISSN: 0898-1221, Vol: 145, Page: 275-288
2023
- 2Citations
- 4Captures
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Article Description
In this study, we develop a single-phase free-surface flow model with the improved lattice kinetic scheme (LKS) and the volume of fluid (VOF) method. We implement the piecewise linear interface calculation (PLIC) algorithm to reconstruct the interface. The gas phase velocity is extrapolated from the liquid phase velocity using a velocity extension method and the signed distance function (SDF) to advect the VOF function. We calculate the SDF with the level-set reinitialisation method, and the VOF function is used as the initial profile. We discuss the advantages of the improved LKS in terms of the free-surface boundary condition by means of distribution functions, which conflict in interface cells in conventional streaming and collision processes in the lattice Boltzmann method (LBM). The proposed free-surface model is verified with well-known advection benchmark problems. We also simulate a static water problem and dam break flow. The proposed model accurately calculates the dam break surge front. Although the surge front position depends on the spatial resolution in the conventional LBM free-surface model, the improved LKS results are approximately the same regardless of the resolution. This is a critical difference between the proposed and conventional LBM models and represents a unique feature of the improved LKS.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0898122123002766; http://dx.doi.org/10.1016/j.camwa.2023.06.022; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85163862431&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0898122123002766; https://dx.doi.org/10.1016/j.camwa.2023.06.022
Elsevier BV
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