Numerical Simulation of Long Wave Runup for Breaking and Nonbreaking Waves
Résumé
Tsunamis produce a wealth of quantitative data that can be used to improve tsunami hazard awareness and to increase the
preparedness of the population at risk. These data also allow for a performance evaluation of the coastal infrastructure and
observations of sediment transport, erosion, and deposition. The interaction of the tsunami with coastal infrastructures and with
the movable sediment bed is a three-dimensional process. Therefore, for runup and inundation prediction, three-dimensional
numerical models must be employed. In this study, we have employed Smoothed Particle Hydrodynamics (SPH) to simulate
tsunami runup on idealized geometries for the validation and exploration of three-dimensional flow structures in tsunamis.
We make use of the canonical experiments for long-wave runup for breaking and nonbreaking waves. The results of our
study prove that SPH is able to reproduce the runup of long waves for different initial and geometric conditions. We have
also investigated the applicability and the effectiveness of different viscous terms that are available in the SPH literature.
Additionally, a new breaking criterion based on numerical experiments is introduced, and its similarities and differences with
existing criteria are discussed.