The Low-frequency Currents Caused by Radiation Waves in an Experimental Flume : Part3 : Second-order Currents and Changes in Mean Surface Level on Heaving Motion of a Rectangular Body

Abstract

Following the previous papers, the second-order currents and changes in local mean surface level induced by two-dimensional mono- and bi-chromatic radiation waves in an experimental flume are discussed. In this paper, particularly, the comparison between the results obtained from a paddle type wave-maker and heaving motion of a rectangular body is investigated. It is found that the second-order currents and changes in local mean surface level are almost same when they are non-dimensionalized in terms of the amplitude of the first-order radiation waves.