Abstract
In consequence of the huge spatial scale, the computation load of Tsunami simulation tends to be too large to afford. In order to overcome this difficulty, a rapid numerical simulator was constructed by applying the GPGPU technology to solve the 2-dimensional shallow water equations. This simulator is based on an explicit finite volume scheme combined with unstructured triangular meshes. With the power of GPGPU, this simulator can be used to simulate large scale Tsunami movement. Furthermore, by using unstructured meshes, complex boundary could also be represented well. And, the Recursive Spectral Bisection (RSB) method was used to enable GPU computations. The simulation results for the run-up Tsunami in Tone River caused by Tohoku earthquake (2011) are verified and validated, and show that it is sufficiently accurate for real-world simulations.
