Scattering of the tsunami wave impinging into a forest for damage prevention

Abstract

Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.

A tsunami originated in a deep sea due to the tectonic activity such as earthquake is the transport phenomena of great scale energy, which makes much damage to sea-bounded area since its wave height becomes higher approaching the sea shore. Therefore, the tsunami wave is a kind of shallow water wave, and the characteristics similar with the shock wave in gas dynamics should be noted so remarkably that there exists a sharp discontinuity before and after the wave front. Actually there is a mathematical similarity between the equations of shallow water waves and gas dynamics. In this research, the existing code concerning the computation of unsteady shock waves is improved to simulate the propagation of tsunami waves. With this code, reflection, diffraction, and scattering of an incident shock wave are studied in the view point of physics, and the basic parameter analysis of stand density and the distance between trees is made for the application in the future.