On the Flow Resistance in the Porous Struction : Specially about Steady Flow

One of the most important causes of the destruction of dikes by waves is that the sand particles inside of the dikes are drawn out by the waves. To analyze this kind of phenomenon theoretically, it became necessary to know the fluid resistance of the porous media. In order to clear the fluid resistance, we used the pipe model and dimensional analysis, and we determined the coefficient of resistance as fiction of Reynolds number.