伊勢湾数値シミュレータの研究・第3報 : 3次元モデルの開発

概要

論文の詳細を見る
In this paper, numerical analysis method of the three-dimensional flow simulator of Ise Bay newly developed is described. The simulator is based on the finite difference method with general curvilinear coordinate system. The computational grids conform with the shape of water surface as well as landform. The grid system is a quasi-regular type for which three velocity components are defined on a same grid point and water elevation is defined in a cell center point. To avoid the splitting of solution which inevitably occurs on the quasi-regular grid system, the numerical scheme developed for two-dimensional model is utilized again. In numerical flow simulations of ocean, numerical stability related to the phase velocity of gravity wave restricts the length of time interval of discrete time step. To relax this restriction, a new time split method was devised and equipped in the simulator. The test run for 100 tidal peridos were performed and stability and robustness of the model were confirmed. CPU time required for the run was within the practical range. Conservation properties of volume and salinity were fairly well. It is seen that the obtained solution has reproduced features of the flow field in Ise Bay. The detail analysis of Ise Bay is the future problem.
四日市大学の論文
1999-09-30