Details
| Originalsprache | Deutsch |
|---|---|
| Seiten | 897-904 |
| Seitenumfang | 8 |
| Publikationsstatus | Veröffentlicht - 2013 |
Abstract
Schlagwörter
- Bound long waves, First order and second order wave paddle, Focusing wave, Fully nonlinear simulation, Sub and super harmonics, Fully nonlinear, Second order waves, Super-harmonic, Computer simulation, Fast Fourier transforms, Focusing, Harmonic analysis
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2013. 897-904.
Publikation: Konferenzbeitrag › Paper › Forschung › Peer-Review
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TY - CONF
T1 - Focused wave evolution in intermediate water depth using first and second order wave maker theory
AU - Sriram, V.
AU - Schlurmann, T.
AU - Schimmels, S.
N1 - Cited By :8 Export Date: 1 February 2021
PY - 2013
Y1 - 2013
N2 - In this paper, focused wave evolution using linear and second order paddle displacements under laboratory conditions are reported. It is well known that in intermediate water depths, linear paddle displacements will generate spurious, free, sub and super harmonics. Thus, a second order correction to suppress these spurious free sub and super harmonics are used to generate the focused waves. The focused waves are generated in the laboratory using a wave-wave interaction process. The test cases correspond to wave focusing packets propagating in intermediate and deep water regions. Further, for each wave packet, two different amplitudes are considered, corresponding to non breaking and breaking cases. The time evolution of the selected harmonics are analyzed using the Inverse Fast Fourier Transform (IFFT), to show the propagation of the spurious, free, long waves. Finally, the generated test cases are again simulated using the fully nonlinear wave model developed in Sriram et al., (2010). Good agreements are obtained and the numerical model is used further to explain the spatial evolution of the skewness for the complete wave focusing process (from wave paddle location to defocusing process locations), due to limited experimental measurements. Copyright © 2013 by the International Society of Offshore and Polar Engineers (ISOPE).
AB - In this paper, focused wave evolution using linear and second order paddle displacements under laboratory conditions are reported. It is well known that in intermediate water depths, linear paddle displacements will generate spurious, free, sub and super harmonics. Thus, a second order correction to suppress these spurious free sub and super harmonics are used to generate the focused waves. The focused waves are generated in the laboratory using a wave-wave interaction process. The test cases correspond to wave focusing packets propagating in intermediate and deep water regions. Further, for each wave packet, two different amplitudes are considered, corresponding to non breaking and breaking cases. The time evolution of the selected harmonics are analyzed using the Inverse Fast Fourier Transform (IFFT), to show the propagation of the spurious, free, long waves. Finally, the generated test cases are again simulated using the fully nonlinear wave model developed in Sriram et al., (2010). Good agreements are obtained and the numerical model is used further to explain the spatial evolution of the skewness for the complete wave focusing process (from wave paddle location to defocusing process locations), due to limited experimental measurements. Copyright © 2013 by the International Society of Offshore and Polar Engineers (ISOPE).
KW - Bound long waves
KW - First order and second order wave paddle
KW - Focusing wave
KW - Fully nonlinear simulation
KW - Sub and super harmonics
KW - Fully nonlinear
KW - Second order waves
KW - Super-harmonic
KW - Computer simulation
KW - Fast Fourier transforms
KW - Focusing
KW - Harmonic analysis
M3 - Paper
SP - 897
EP - 904
ER -