Pressure Wave Propagation, Acoustic Wave Model, Wave Attenuation, Water Pool, Noncondensible Gas
A pressure wave existing in an actual water system is accompanied by complicated physical processes consisting of pressure generation, its propagation and reflection on wall surfaces. In addition, noncondensible gas such as air has an important influence on the attenuation of the high frequency component of the pressure wave in water, even if the amount contained is very small. In this paper, a physical model was developed on the basis of acoustic approximation, analyzing the pressure wave propagation in a water pool surrounded by flexible and rigid walls. The study was focused especially on the mathematical formulation of wave attenuation models and the numerical comparison between these models, one of which is assigned to the effect of air as noncondensible gas.