The landslide generated tsunami is one of the most devastating nature hazards. However, the involvement of the moving solid boundary and free-surface makes numerical simulation a difficult task. In this book, we present a newly developed two-way coupled moving solid algorithm (MSA) with discrete element method (DEM) to simulate dynamic fluid-solid interaction. MSA is utilized to present the effect of solid motion on the fluid, while the sophisticated DEM model is utilized to predict the solid motion based on the surface pressure obtained from solving the N-S equations. In our model, the...