RECENT ADVANCES OF LBM FOR TSUNAMI MODELLINGS: AN ENHANCEMENT OF IMPACT PRESSURE CALCULATION BY FOURTH-ORDER CUMULANT MODEL

Tsunamis, though infrequent, wield devastating power upon coastal regions, necessitating accurate simulation techniques to comprehend their impact and enhance disaster preparedness. Despite the significant advancements in modern computational fluid dynamics, these simulations continue to pose considerable challenges, encompassing numerical intricacies and substantial computational expenses. In the context of this issue, the lattice Boltzmann method (LBM) has garnered attention for its ability to perform high-performance simulations of large-scale tsunamis due to its remarkable computational efficiency. In recent years, there have been reported instances of utilising the LBM for tsunami simulations, and its application is poised to increase further in the forthcoming research. In this study, we present the recent advances of the LBM for tsunami modelling, especially in the non-hydrostatic three- dimensional free surface flow model and discuss future development. We will demonstrate an enhancement of tsunami impact pressure simulations using the fourth- order cumulant model (Geier et al. 2017).