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Asymmetry of Wind Waves Studied in a Laboratory Tank : Volume 2, Issue 3/4 (30/11/-0001)

By Leykin, I. A.

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Book Id: WPLBN0003985358
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Asymmetry of Wind Waves Studied in a Laboratory Tank : Volume 2, Issue 3/4 (30/11/-0001)  
Author: Leykin, I. A.
Volume: Vol. 2, Issue 3/4
Language: English
Subject: Science, Nonlinear, Processes
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Mclaughlin, D. J., Mellen, R. H., Donelan, M. A., & Leykin, I. A. (-0001). Asymmetry of Wind Waves Studied in a Laboratory Tank : Volume 2, Issue 3/4 (30/11/-0001). Retrieved from

Description: Northeastern University, Boston, MA 02115, USA. Asymmetry of wind waves was studied in laboratory tank tinder varied wind and fetch conditions using both bispectral analysis of wave records and third-order statistics of the surface elevation. It is found skewness S (the normalized third-order moment of surface elevation describing the horizontal asymmetry waves) varies only slightly with the inverse wave u*/Cm (where u* is the air friction velocity and Cm is phase speed of the dominant waves). At the same time asymmetry A, which is determined from the Hilbert transform of the wave record and characterizes the skewness of the rate of change of surface elevation, increase consistently in magnitude with the ratio u*/Cm. This suggests that nonlinear distortion of the wave profile determined by the degree of wind forcing and is a sensitive indicator of wind-wave interaction processes. It is shown that the asymmetric profile of waves can described within the frameworks of the nonlinear nonspectral concept (Plate, 1972; Lake and Yuen, 197 according to which the wind-wave field can be represented as a coherent bound-wave system consisting mainly of dominant component w. and its harmonics propagating with the same speed C. , as observed by Ramamonjiaris and Coantic (1976). The phase shift between o). harmonics is found and shown to increase with the asymmetry of the waves.

Asymmetry of wind waves studied in a laboratory tank


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