Open AccessON THE GROWTH OF WATER WAVES BY TURBULENT WIND
Author(s) -
H. Mitsuyasu,
T. Kusaba
Publication year - 1986
Publication title -
proceedings of conference on coastal engineering/proceedings of ... conference on coastal engineering
Language(s) - English
Resource type - Journals
eISSN - 2156-1028
pISSN - 0589-087X
DOI - 10.9753/icce.v20.44
Subject(s) - dimensionless quantity , wind wave , turbulence , monochromatic color , growth rate , physics , spectral density , mechanics , action (physics) , wind power , meteorology , power law , infragravity wave , atmospheric sciences , computational physics , mathematics , optics , geometry , wave propagation , mechanical wave , thermodynamics , longitudinal wave , engineering , electrical engineering , statistics , quantum mechanics
The growth of water waves by turbulent wind is studied on the basis of typical results of recent studies. It is shown that the energy input from wind to a spectral component is not much affected by the existence of the other spectral components, and the dimensionless growth rate 3/f is uniquely determined by u^/c if the friction velocity u* measured over the water surface is used for the analysis. It is also shown that steep monochromatic waves without wind action show very complicated spectrum, but, under the wind action, they tend to be a continuous spectrum which has a spectral peak near the frequency of the lower side band and satisfy the 3/2 power law.