WAVES IN TURNING WIND FIELDS

Proceedings of the International Conference on Coastal Engineering

L.H. Holthuijsen¹  G.Ph. van Vledder¹ 

[1] Delft University of Technology

关键词: wind field;    wind waves;    turning wind field;   

DOI  :  10.9753/icce.v21.%p

学科分类：建筑学

来源: Coastal Engineering Research Council

【 摘 要 】

A numerical model to compute to a high degree of accuracy nonlinear wave-wave interactions of wind generated waves supplemented with formulations of wind generation and white-capping, has been used to estimate qualitatively and quantitatively the effect of these physical processes on the directional response of waves in a turning wind field. After a sudden shift in wind direction the wave spectrum develops a secondary peak in the new wind direction. The initial peak of the spectrum either merges fairly quickly with this new peak or it slowly disappears, depending on the magnitude of the directional wind shift. The turning of the mean wave direction towards the new wind direction is caused by wind generation. The processes of nonlinear wave-wave interactions and white-capping tend to slow down the turning rate induced by the wind generation. The net turning rate of the mean wave direction in the model is twice as slow as in observations acquired in the central and southern North Sea.

【 授权许可】

Unknown