THREE-DIMENSIONAL TSUNAMI SIMULATION AT WATER INTAKE FACILITY

Abstract

 In this study, we carried out numerical simulations using a three-dimensional numerical wave tank “CADMAS-SURF/3D” in order to estimate tsunami inflow process at a water intake facility with high accuracy. We also conducted parameter study changing wall boundary condition, the discretization scheme of advective term, and turbulence model. As a result, wall-function boundary condition, first-order upwind scheme and standard k-ε model were found to be reproducible in the present study. The experimental and numerical results also revealed that pump intake volume has a strong effect on tsunami inflow process. The application of a three-dimensional numerical model is said to be important to figure out tsunami inflow process at a water intake facility since three-dimensional complex flow including turbulence is formed by tsunami inflow.