粒子法による津波発生から陸地への遡上までのマルチスケール津波解析

<p>Due to future tsunami disaster prevention planning, it is strongly desired a simulation tool that accurately predicts possible damage level for structures and human resources in the inundation area. For the tsunami run-up simulation, we must calculate the crustal deformation as an input of the initiation of tsunami wave around the seismic fault. A stagger elasticity theory, in which homogeneous and spatial infinity is assumed to formulate the theory, is applied in practical and conventional crustal deformation estimation. But in this paper, we conducted a series of disasters simulation from earthquake scenario, crustal deformation and tsunami propagation sequentially in order to discuss the necessity of consideration of seismic fault rupture propagation in tsunami simulation.</p><p>When modeling the entire city with a high fidelity particle model, one must deal with an enormous number of degrees of freedom, and implementation of highly parallel calculation is indispensable. In this paper, we developed a computational algorithm with high parallelization efficiency for the liquid spreading phenomenon over a flat plane problem, for later apply on tsunami run-up simulation. In particular, we propose an expanding slice grid method to utilize maximum efficiency on memory utilization and computational speed. At the end of this paper, high fidelity tsunami run-up simulation in Kochi City by the Expanding slice grid method were conducted, and the utility of the proposed method was discussed.</p>