scholarly journals FREQUENCY DOWNSHIFTING OF WAVE SPECTRA AND FORMATION OF FREAK WAVES ON NON-UNIFORM OPPOSING CURRENT

2014 ◽  
Vol 1 (34) ◽  
pp. 24 ◽  
Author(s):  
Igor Shugan ◽  
Yana Saprykina ◽  
Sergey Kuznetsov ◽  
Ray-Yeng Yang
Keyword(s):  
Wave Spectra ◽  
Freak Waves ◽  
Frequency Downshifting

scholarly journals Nonlinear Evolution Equations for Broader Bandwidth Wave Packets in Crossing Sea States

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
S. Debsarma ◽  
S. Senapati ◽  
K. P. Das
Keyword(s):  
Growth Rate ◽  
Evolution Equations ◽  
Nonlinear Evolution ◽  
Modulational Instability ◽  
Wave Packets ◽  
Nonlinear Evolution Equations ◽  
Wave Spectra ◽  
Surface Gravity Wave ◽  
Freak Waves ◽  
Wave Trains

Two coupled nonlinear equations are derived describing the evolution of two broader bandwidth surface gravity wave packets propagating in two different directions in deep water. The equations, being derived for broader bandwidth wave packets, are applicable to more realistic ocean wave spectra in crossing sea states. The two coupled evolution equations derived here have been used to investigate the instability of two uniform wave trains propagating in two different directions. We have shown in figures the behaviour of the growth rate of instability of these uniform wave trains for unidirectional as well as for bidirectional perturbations. The figures drawn here confirm the fact that modulational instability in crossing sea states with broader bandwidth wave packets can lead to the formation of freak waves.

scholarly journals PROPERTIES OF FREAK WAVES INDUCED BY TWO KINDS OF NONLINEAR MECHANISMS

2012 ◽  
Vol 1 (33) ◽  
pp. 73
Author(s):  
Aifeng Tao ◽  
Jinhai Zheng ◽  
Botao Chen ◽  
Hui Li ◽  
Ji Peng
Keyword(s):  
Modulation Instability ◽  
Stokes Wave ◽  
Wave Spectra ◽  
Wave Group ◽  
Wave Interactions ◽  
Freak Waves ◽  
Kinematic Characteristics ◽  
Long Time ◽  
Wave Trains ◽  
Different Time Scales

We investigate the dynamic and kinematic characteristics of freak waves using a direct phase-resolved nonlinear numerical method. The focus is on the understanding of the effects of different nonlinear wave-wave interactions on freak waves development and characteristics in the evolution process of modulated Stokes wave trains. Long time simulations of modulated Stokes wave trains, with different parameters, are obtained. Based on these simulations, we find that there are different kinds of freak waves in different time scales due to two kinds of different nonlinear mechanisms. One is the modulation instability and another related to the wave group interaction. Both the dynamic and kinematic characteristics of the different kinds of freak waves are distinct. Occurrence of freak waves (especially of large height) is usually correlated with broadband wave spectra.

Observed Suspended Sediment Profiles under the Effect of Single and Double Peaked Wave Spectra

2006 ◽  
Author(s):  
M. R. Delgado Blanco ◽  
M. Olabarrieta Lizaso ◽  
A. Giardino ◽  
R. Banasiak ◽  
R. Verhoeven ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Wave Spectra ◽  
Sediment Profiles

Multi-peaked directional wave spectra based on extensive field measurement data in the Gulf of Oman

2021 ◽  
Vol 230 ◽  
pp. 109057
Author(s):  
Mohammad Adibzade ◽  
Mehdi Shafieefar ◽  
Hassan Akbari ◽  
Roozbeh Panahi
Keyword(s):  
Field Measurement ◽  
Measurement Data ◽  
Wave Spectra ◽  
Gulf Of Oman ◽  
Extensive Field ◽  
Directional Wave

scholarly journals Self-similar gravity wave spectra resulting from the modulation of bound waves

2018 ◽  
Vol 3 (5) ◽  
Author(s):  
Guillaume Michel ◽  
Benoît Semin ◽  
Annette Cazaubiel ◽  
Florence Haudin ◽  
Thomas Humbert ◽  
...  
Keyword(s):  
Gravity Wave ◽  
Wave Spectra ◽  
Self Similar

Millimeter- and submillimeter-wave spectra of AuCl and AuBr in the X1Σ+ electronic ground states

2003 ◽  
Vol 220 (2) ◽  
pp. 155-161 ◽  
Author(s):  
Toshiaki Okabayashi ◽  
Emi Yamazaki ◽  
Kazuhiro Tsukamoto ◽  
Mitsutoshi Tanimoto
Keyword(s):  
Ground States ◽  
Submillimeter Wave ◽  
Wave Spectra ◽  
Electronic Ground
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