Abstract

Effect of Reynolds number on model experiment of wave transformation was examined for permeable breakwaters with a precast concrete armour unit in shallow water region.Transmission coefficient, KT increases by the increase in Reynolds number, Re and experiment magnification, N at logarithmic.Then, linearized friction coefficient, f is decreased with the increase in Reynolds number, and transmission coefficient increases.As a result of examining transmission coefficient in the field using the equation of the authors which is possible to calculation of transmission coefficient. Then, transmission coefficient becomes almost constant at Re>50×104 and it is about 50%.

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