The Low-frequency Wave Fields Induced by Radiation Waves in an Experimental Flume : Part 2 : Second-order Changes in Mean Surface Level for a Paddle Type Wave-maker

Abstract

Following the previous paper, we study the second-order changes in local mean surface level induced by two-dimensional bichromaic radiation waves in an experimental flume with a paddle type wave-maker. The second-order velocity potential in the case of bichromatic waves consists of the steady terms of each wave component and the long-period terms which correspond to locked and free waves. From the numerical examples, it is found that the free-wave component plays an important roll in the evaluation of the local mean surface level and it is also shown that the most part of it is set down, but the higher part of it is set up.