Numerical and Experimental Study on Drift due to Tsunami for Several Drifting Bodies

Abstract

In order to predict the behavior of floating body under tsunami flood appropriately, it is significant to evaluate the drag force exerted on the float shape when reproducing the dynamics with drift. So, we prepared the drift simulation model based on the Distinct Element Method (DEM). In the simulation, every flotsam shape was expressed by an assembly of individual sphere elements and current velocity field generated by tsunami was given from the result of the tsunami propagation simulation computed in advance. This paper shows experimental results of car's drag force coefficient as a function of every current angle. And we report the application of the drift simulation method by comparing the drift motion from the experiment in a 2-dimensional plane water tank with that of the simulation result.

Diseño de un sistema regional de alerta de tsunamis como parte integral de la operación portuaria

“…Después del tsunami del 2004 en el Océano Indico, estudios similares pero con diferentes materiales fueron realizados, por ejemplo, en barcos y embarcaciones (Ikeya et al, 2006;Fujii et al, 2007), en vehículos (Anno et al, 2007) y en contenedores (Kumagai, et al, 2007).…”