Outcomes of the Special Issue on Extreme and Rogue Waves

Pelinovsky, Efim; Kharif, Christian

doi:10.5194/nhess-11-2043-2011

Cited by 3 publications

(4 citation statements)

References 25 publications

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“…The dispersive focussing can be explained by creating a long wave group with decreasing frequencies, then the dispersion forces the group to contract to a few wavelengths at a given position. This mechanism is also suggested in [18,7,11,19]. Reference [13] confirmed that extreme waves most likely occur due to the dynamics of a single wave group in agreement with the dynamics imposed by the Zakharov equation [20].…”

Section: Introductionsupporting

confidence: 60%

“…Understanding the mechanism of freak wave appearance is important as it may cause damages in the ocean or shore. Indonesian region has the largest number of fatalities caused by freak waves [7,8]. On 1 January 2016, local media reported a freak wave up to 9m high came to the shore, specifically at Bantul Jati and Perawan Desa beach in Malang regency and dragged five people [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Freak Wave Formation from Phase Coherence

Latifah

Groesen²

2017

J. Phys.: Conf. Ser.

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Abstract. This paper describes freak waves by a (pseudo-)maximal wave proposed in [1]. The freak wave is a consequence of a group event that is present in a time signal at some position and contains successive high amplitudes with different frequencies. The linear theory predicts the position and time of the maximal amplitude wave quite well by minimizing the variance of the total wave phase of the given initial signal. The formation of the freak wave is shown to be mainly triggered by the local interaction of waves evolving from the group event that already contained large local energy. In the evolution, the phases become more coherent and the local energy is focussed to develop a larger amplitude. We investigate two laboratory experimental signals, a dispersive focussing wave with harmonic background and a scaled New Year wave. Both signals generate a freak wave at the predicted position and time and the freak wave can be described by a pseudo-maximal wave with specific parameters.

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Section: Introductionsupporting

confidence: 60%

Section: Introductionmentioning

confidence: 99%

Freak Wave Formation from Phase Coherence

Latifah

Groesen²

2017

J. Phys.: Conf. Ser.

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“…Onorato et al [3] proposed that the generation of rogue waves in different physical backgrounds and the physical quantities explained in different fields are also different. Pelinovsky et al [4] proposed formation mechanisms of deformed waves, such as dispersion focusing, the Benjamin-Feir instability, etc. An experiment using regular wave packets to pass through the positive current gradient region showed that the increase of wave steepness causes modulation instability and induces the development of largeamplitude water waves.…”

Section: Introductionmentioning

confidence: 99%

SPH Simulation of the Interaction between Freak Waves and Bottom-Fixed Structures

Hu,

Halik,

Muhammadhaji

2023

Mathematics

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In this paper, the Smoothed Particle Hydrodynamics (SPH) method is used in a C# environment to simulate the interaction between freak waves and bottom-fixed structures by establishing a fluid dynamics model. Paraview software 5.10.1 was used to analyze and visualize the simulation results. In order to simulate wave propagation accurately, the reliability of the model was verified by comparing experimental and simulated data. A two-dimensional numerical wave flume was established based on the SPH method, a conservative Riemann solver was introduced, a repulsive boundary condition was adopted, and a slope was used to eliminate wave reflection. Bottom-fixed structures of different heights and lengths, as well as different wave conditions, were selected to numerically simulate the interaction between freak waves and bottom-fixed structures. The results show that the height of bottom-fixed structures and wave conditions have a significant effect on hindering the propagation of rogue waves, while the length has little effect on the propagation of deformed waves. When the amplitude of the wave remains constant, both the period andthe duration of the deformed wave are longer. This research is of certain significance for the prediction of freak waves in marine engineering and the application and promotion of SPH methods.

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“…The emergence of a single high wave can be seen as resulting from an essentially linear constructive interference of numerous harmonics and the role of nonlinearity is limited to modification of the initial spectrum to the prescribed shape at the focusing locations identical phases of all harmonics [Shemer, 2016]. This mechanism is also suggested in Kharif and Pelinovsky [2003], Gemmrich and Garrett [2008], Pelinovsky and Kharif [2011] and Longuet-Higgins [1974]. Fedele [2007] confirmed that extreme waves most likely occur due to the dynamics of a single wave group in agreement with the dynamics imposed by the Zakharov equation [Zakharov, 1999].…”

Section: Mechanisms Of Extreme Wavesmentioning

confidence: 95%

Freak wave

Latifah¹

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Outcomes of the Special Issue on Extreme and Rogue Waves

Abstract: No Abstract available

Cited by 3 publications

References 25 publications

Freak Wave Formation from Phase Coherence

Freak Wave Formation from Phase Coherence

SPH Simulation of the Interaction between Freak Waves and Bottom-Fixed Structures

Freak wave

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