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Two-phase flow simulations of dam-break problem by lattice Boltzmann method
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DOI：10.1007/s42241-026-0047-4.png)
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Abstract
En 中文
To apply the lattice Boltzmann method (LBM) to violent free-surface flows in ocean engineering, rigorous validation of both numerical stability and accuracy is essential. This study quantitatively assessed the accuracy of a velocity-based two-phase LBM for gas-liquid flow simulations, with particular emphasis on wave impact pressures. Two dam-break benchmark problems–A simple dam-break and a dam-break involving a rectangular obstacle-were simulated, and the resulting pressure-time histories were compared with experimental data from previous studies. For coarse meshes, instantaneous peak pressures were generally underestimated relative to experimental measurements. As mesh resolution increased, the predicted peak pressures rose and approached the experimental values, although some sensors exhibited slight overestimation. The results demonstrate sufficient numerical stability for laboratory-scale dam-break simulations, with no nonphysical oscillations observed in the velocity field. The in-house LBM code was implemented on multi–GPU systems and enabled large-scale gas-liquid two-phase simulations with meshes up to 1932×600×600, corresponding to approximately 696 million lattice points. These findings highlight the potential of the LBM as a robust and scalable tool for high-resolution, massively parallel simulation of complex multiphase flows in ocean engineering.
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