水面変動をパラメータとした開水路乱流計算のための2方程式乱流モデルの改良

抄録

Free-surface effects have been incorporated in a two equation turbulence model and applied to computation of fully developed two-dimensional open-channel flow. A semi-empirical relation is used to determine the surface fluctuation and is used as a parameter that reflects the surface effects. A semi-empirical formula for the surface fluctuation has been obtained and used in actual calculations. The results are compared with experiments to show its effectiveness in representing the surface effects for a range of Froude and Reynolds numbers.