Cylindrical and spherical Akhmediev breather and freak waves in ultracold neutral plasmas

2018 ◽  
Vol 25 (1) ◽  
pp. 012121 ◽  
Author(s):  
S. A. El-Tantawy ◽  
E. I. El-Awady
Keyword(s):  
Freak Waves ◽  
Ultracold Neutral Plasmas

Ultracold neutral plasmas

2016 ◽  
Vol 80 (1) ◽  
pp. 017001 ◽  
Author(s):  
M Lyon ◽  
S L Rolston
Keyword(s):  
Ultracold Neutral Plasmas

scholarly journals Freak waves: just bad luck, or avoidable?

2005 ◽  
Vol 36 (5) ◽  
pp. 159-162 ◽  
Author(s):  
Eric Heller
Keyword(s):  
Freak Waves

Solitary and freak waves in a dusty plasma with negative ions

2011 ◽  
Vol 18 (9) ◽  
pp. 092305 ◽  
Author(s):  
U. M. Abdelsalam ◽  
W. M. Moslem ◽  
A. H. Khater ◽  
P. K. Shukla
Keyword(s):  
Dusty Plasma ◽  
Negative Ions ◽  
Freak Waves

Non-Gaussian Extreme Waves in the Central North Sea

1997 ◽  
Vol 119 (3) ◽  
pp. 146-150 ◽  
Author(s):  
J. Skourup ◽  
N.-E. O. Hansen ◽  
K. K. Andreasen
Keyword(s):  
Wave Height ◽  
North Sea ◽  
Upper Bound ◽  
Wave Crest ◽  
Extreme Waves ◽  
Freak Waves ◽  
Freak Wave ◽  
Wave Trains ◽  
Central North Sea ◽  
Crest Height

The area of the Central North Sea is notorious for the occurrence of very high waves in certain wave trains. The short-term distribution of these wave trains includes waves which are far steeper than predicted by the Rayleigh distribution. Such waves are often termed “extreme waves” or “freak waves.” An analysis of the extreme statistical properties of these waves has been made. The analysis is based on more than 12 yr of wave records from the Mærsk Olie og Gas AS operated Gorm Field which is located in the Danish sector of the Central North Sea. From the wave recordings more than 400 freak wave candidates were found. The ratio between the extreme crest height and the significant wave height (20-min value) has been found to be about 1.8, and the ratio between extreme crest height and extreme wave height has been found to be 0.69. The latter ratio is clearly outside the range of Gaussian waves, and it is higher than the maximum value for steep nonlinear long-crested waves, thus indicating that freak waves are not of a permanent form, and probably of short-crested nature. The extreme statistical distribution is represented by a Weibull distribution with an upper bound, where the upper bound is the value for a depth-limited breaking wave. Based on the measured data, a procedure for determining the freak wave crest height with a given return period is proposed. A sensitivity analysis of the extreme value of the crest height is also made.

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