波浪・流速の数値解析の実海域への適用性に関する評価

3次元流体運動計算の高速化

抄録

The Multigrid method (MG) was applied to the 2D and 3D simulations for water waves on various topographies, and the efficiency in terms of computation speed was discussed in this paper. Purpose of this paper is to remove the limitation of computational costs for numerical investigations by introducing MG and to evaluate the availability of this numerical method for practical estimations in the actual wave field. The computational time and number of iteration that MG requires is quantitatively compared with the conventional Gauss-Seidel method (GS). It is found that the MG makes the computational time to save 90-95% for the two-dimensional simulation and 65-80 % for the three-dimensional simulation. Further improvement of the scheme is also discussed in this paper.