Investigation Of Numerical Wave Channel ConcerningAbsorbing Boundary

Dissipating technics such as sponges, absorbing beaches had become an interesting technique for the simulations of numerical wave tank. recently. The simulation of a two dimensional wave tank considering absorbing boundary are investigated in this study by means of boundary element method. With the time histories of water elevation measured by a pseudo wave gage, the absorption coefficient pi, was verified by studying the case of solitary wave propagating over "e zone was the water tank with a sponge zone fixed behind. where the spon, divided into a smoothly varied p area and a constant p area. The purpose is to adopt an optimum combination of absorption coefficient and sponge length to minimize the reflection. Our results show that the attenuation rate of Lvave energy reaches 99.8?/0 and upward. which approaches nearly 100% wave energy absorbed.