期刊
OCEAN ENGINEERING
卷 290, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2023.116428
关键词
Level set method; Free-surface; Two-phase flow; Mass conservation; Liquid sloshing
This paper presents a level set re-distancing (NLS) method for simulating incompressible interfacial flows, aiming to preserve mass conservation and accurately predict interface evolution. The method advects the level set function using an advection equation and simulates the re-distancing equation with a proper mass-correction term. The performance and capabilities of the method are verified through benchmark tests and comparisons with existing results.
This paper presents a level set re-distancing (NLS) method to better preserve mass conservation and more accurately predict interface evolution in the simulation of incompressible interfacial flows. In this method, the level set function is first advected by an advection equation. The key to this method depends on the simulation of the re-distancing equation subject to a proper mass-correction term. The performance of the proposed NLS method is verified against benchmark cases such as vortex deforming and Zalesak's cases. The NLS method is then combined with an explicit Adams-Bashforth scheme on a staggered Eulerian grid to obtain Navier- Stokes solutions. Two-layer liquid sloshing, dam-break flow and Rayleigh-Taylor instability are simulated and compared with numerical or experimental results reported in literature. Two-phase flows that involve nonlinear phenomena such as bubble rising and bubble bursting at a free-surface are also chosen to demonstrate the ability of the proposed method in considering surface tension. The NLS method proposed in this paper is compared with the CLSVOF method of Li and Yu (2019) in terms of computational time in dam-break flow and Rayleigh-Taylor instability cases.
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