Record Details

Numerical simulation of wind wave surface profiles with tuned phase spectra

DRS at CSIR-National Institute of Oceanography

View Archive Info
 
 
Field Value
 
Title Numerical simulation of wind wave surface profiles with tuned phase spectra
 
Creator Varkey, M.J.
 
Subject Oceanography and Limnology
winds
ocean currents
simulation
wave spectra
 
Description It is known that the phases of the individual harmonic components in a linear narrow band wave spectrum are uniformly random. It has been suggested by some workers that some sort of phase coupling and `locking' between the different spectral components would lead to nonlinear surface waves. Conventional methods of wave recording and analysis inherently fail to record or to bring out the exact quantitative picture of nonlinear interactions due to recording and sampling limitations in relation to nonlinear waves with vertical and horizontal asymmetries especially in the case of breaking and shoaling waves. Hence, the inverse method of computing the surface profile from a known autospectrum using transformed (tuned) phase spectrum with coupling of different natures is tried and the results are presented here. Increased wave groupiness is found for higher spectral peak periods with phase coherency at the peak. Abnormally high breaking waves (freak waves) are generated when frequency dependent (by Normal probability law) phase spectrum is used. The results suggest that external factors like currents, wind, boundaries (bottom) and other waves systems can cause changes in the phase spectrum to give rise to nonlinear processes
 
Date 1995-08-14T10:01:52Z
2017-09-30T01:29:57Z
1995-08-14T10:01:52Z
2017-09-30T01:29:57Z
1989
 
Type Journal Article
 
Identifier Indian Journal of Marine Sciences, vol.18; 1989; 177-183
0379-5136
http://drs.nio.org/drs/handle/2264/7244
 
Language en
 
Relation Indian J Mar Sci
SCI
 
Publisher CSIR-NISCAIR