ドライベッドを遡上する長波の抵抗則
1988 年 1988 巻 399 号 p. 203-212
詳細
1988 年 1988 巻 399 号 p. 203-212
Friction laws are obtained through hydraulic experiments on long waves running up on a dry bed. In the experiments, a bottom-running channel is used to yields a stationary wave and the water particle velocity is measured with an LDV. Similarity laws are found in the distributions of velocity and Reynolds stresses in the bottom boundary layer. The turbulence structure obserbed is quite similar to that in a turbulent boundary layer of a flow without free surface. Numerical simulations using the obtained friction laws successfully reproduce the tip profile of a wave as well as its run-up height.
