Applicability of Nonlinear Wavemaker Theory

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3 Citationer (Scopus)
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Resumé

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.
OriginalsprogEngelsk
Artikelnummer14
TidsskriftJournal of Marine Science and Engineering
Vol/bind7
Udgave nummer1
Antal sider15
ISSN2077-1312
DOI
StatusUdgivet - 14 jan. 2019
BegivenhedCoastlab18: 7th International Conference on the Application of Physical Modelling in Coastal and Port Engineering and Science - Santander, Spanien
Varighed: 22 maj 201826 maj 2018
Konferencens nummer: 7

Konference

KonferenceCoastlab18
Nummer7
LandSpanien
BySantander
Periode22/05/201826/05/2018

Fingerprint

wave generation
nonlinear wave
model test
Wave functions
kinematics
Numerical models
Kinematics
method

Bibliografisk note

Special Issue "Selected Papers from Coastlab18 Conference"

Emneord

  • Linear waves
  • Nonlinear waves
  • Wavemaker theory
  • Wavemaker applicability

Citer dette

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title = "Applicability of Nonlinear Wavemaker Theory",
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",
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Applicability of Nonlinear Wavemaker Theory. / Eldrup, Mads Røge; Andersen, Thomas Lykke.

I: Journal of Marine Science and Engineering, Bind 7, Nr. 1, 14, 14.01.2019.

Publikation: Bidrag til tidsskriftKonferenceartikel i tidsskriftForskningpeer review

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AU - Andersen, Thomas Lykke

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PY - 2019/1/14

Y1 - 2019/1/14

N2 - 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.

AB - 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.

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