Topic
Rogue wave
About: Rogue wave is a research topic. Over the lifetime, 2977 publications have been published within this topic receiving 70933 citations. The topic is also known as: freak wave & monster wave.
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01 Jan 2003
TL;DR: In this article, the authors used focused wave groups in the UKCoastal Research Facility (UKCRF) to determine the relationship between the input signals sent to the paddles and the waves generated in the facility.
Abstract: This thesis describes experiments that were carried out using focused wave groups in the UK
Coastal Research Facility (UKCRF). Considerable effort was put into calibrating the UKCRF
to determine the relationship between the input signals sent to the paddles and the waves
generated in the facility. Focused wave groups of various sizes and phases, based on NewWave
theory were generated, and measurements were made of the resulting surface elevation data,
water particle kinematics, wave runup and overtopping volumes. NewWave theory models
the profile of extreme waves in a Gaussian (random) sea. The thesis describes the first time
this model has been applied in the context of coastal wave transformation.
A method for the separation of the underlying harmonic structure of a focused wave group
is described and results presented. This technique has been used in relatively deep water but
is shown to work successfully in the coastal zone until wave overturning. A method has
been devised to provide a theoretical Stokes-like expansion of the free and bound waves to
model the surface elevation and water particle kinematics of the focused wave groups. Satisfactory
agreement is achieved between the theoretical predictions of UKCRF measurements.
Suggestions are made for an improved model.
The underlying harmonic structure of the focused wave groups is presented as stacked
time histories that give insight into the wave transformation process from deep to shallow
water. Particular attention is paid to the low frequency wave generated as the wave group
interacts with the beach. This is compared to the low frequency wave that is generated by a
solitary wave in the UKCRF.
Runup and overtopping measurements are in reasonable agreement with predictions based
on certain empirical formulae, but not others. These comparisons are useful in identifying
those formulae able to predict runup and overtopping of extreme waves in the coastal zone.
34 citations
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TL;DR: In this article, the experimental and numerical investigations of dissipative rogue waves (DRWs) among noise-like pulses, in a thulium-doped fiber laser mode locked by a monolayer MoS2 saturable absorber, were conducted.
Abstract: We report on the experimental and numerical investigations of dissipative rogue waves (DRWs) among noise-like pulses, in a thulium-doped fiber laser mode locked by a monolayer MoS2 saturable absorber. By increasing the pumping power or weakening the effective cavity spectral filtering, the statistics distributions of the pulse events deviate from the Gaussian statistics to the L-shaped distributions with long tail, accompanied by the increase of the DRWs proportion. Our observations reveal the dissipat-ive nature of rogue waves in dissipative systems.
34 citations
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34 citations
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TL;DR: In this paper, the statistical properties of supercontinuum spectra generated in photonic crystal fiber with two zero dispersion wavelengths were studied for picosecond pulse excitation, with the detailed form of the probability distribution depending strongly on input pulse energy.
Abstract: Stochastic numerical simulations are used to study the statistical properties of supercontinuum spectra generated in photonic crystal fibre with two zero dispersion wavelengths. For picosecond pulse excitation, we examine how the statistical properties of solitons generated on the long wavelength edge of the supercontinuum (``optical rogue waves") are modified by energy transfer to dispersive waves across the second zero dispersion wavelength. The soliton statistics (characterized in terms of peak power, wavelength and pulse duration) are shown to be strongly modified by the mechanism of dispersive wave generation, with the detailed form of the probability distribution depending strongly on input pulse energy.
34 citations
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TL;DR: In this article, the amplitude modulation of ion-acoustic waves is investigated in an unmagnetized plasma containing positive ions, negative ions, and electrons obeying a kappa-type distribution that is penetrated by a positive ion beam.
Abstract: The amplitude modulation of ion-acoustic waves is investigated in an unmagnetized plasma containing positive ions, negative ions, and electrons obeying a kappa-type distribution that is penetrated by a positive ion beam. By considering dissipative mechanisms, including ionization, negative-positive ion recombination, and electron attachment, we introduce a comprehensive model for the plasma with the effects of sources and sinks. Via reductive perturbation theory, the modified nonlinear Schrodinger equation with a dissipative term is derived to govern the dynamics of the modulated waves. The effect of the plasma parameters on the modulation instability criterion for the modified nonlinear Schrodinger equation is numerically investigated in detail. Within the unstable region, first- and second-order dissipative ion-acoustic rogue waves are present. The effect of the plasma parameters on the characteristics of the dissipative rogue waves is also discussed.
34 citations