2024 Volume 80 Issue 16 Article ID: 23-16043
Numerical methods are highly effective for large-scale and violent fluid phenomena such as tsunamis and floods. Among them, the Lattice Boltzmann Method is an explicit computational approach with high parallelization efficiency. In recent years, the combined use of the cumulant model and Phase-Field method has enabled highly stable analysis of multiphase fluid flows. However, there have been limited applications in the field of civil engineering. Therefore, in this study, we developed a multiphase flow numerical model based on the cumulant model and Phase-Field method specifically intended to analyze intense flow fields. As a validation of the model, we analyzed droplet oscillations in zero-gravity condition and a water column collapsing under gravity. The results showed good accuracy in representing surface tension as well as surge speed. Additionally, by conducting an analysis of water column collapse with obstacles, we confirmed accurate predictions of water level changes and wave pressure under the violent flow condition.
