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J. Mar. Sci. Eng. 2019, 7(1), 14; https://doi.org/10.3390/jmse7010014

Applicability of Nonlinear Wavemaker Theory

Department of Civil Engineering, Aalborg University, 9220 Aalborg, Denmark
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Received: 22 November 2018 / Revised: 20 December 2018 / Accepted: 8 January 2019 / Published: 14 January 2019
(This article belongs to the Special Issue Selected Papers from Coastlab18 Conference)
PDF [2012 KB, uploaded 14 January 2019]

Abstract

Generation of high-quality waves is essential when making numerical or physically model tests. When using a wavemaker theory outside the validity area, spurious waves are generated. In order to investigate the validity of different wave generation methods, new model test results are presented where linear and nonlinear wave generation theories are tested on regular and irregular waves. A simple modification to the second-order wavemaker theory is presented, which significantly reduces the generation of spurious waves when used outside its range of applicability. For highly nonlinear regular waves, only the ad-hoc unified wave generation based on stream function wave theory was found acceptable. For irregular waves, similar conclusions are drawn, but the modified second-order wavemaker method is more relevant. This is because the ad-hoc unified generation method for irregular waves requires the wave kinematics to be calculated by a numerical model, which might be quite time-consuming. Finally, a table is presented with the range of applicability for each wavemaker method for regular and irregular waves.
Keywords: linear waves; nonlinear waves; wavemaker theory; wavemaker applicability linear waves; nonlinear waves; wavemaker theory; wavemaker applicability
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Eldrup, M.R.; Andersen, T.L. Applicability of Nonlinear Wavemaker Theory. J. Mar. Sci. Eng. 2019, 7, 14.

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