Chapter
Dec 31, 2015
Dynamics of Wind in the Vicinity of Progressive Waves
Authors: Omar H. Shemdin and En Yun HsuAuthor Affiliations
Publication: Coastal Engineering 1966
Abstract
This paper presents a fundamental study of the dynamics of wind in the vicinity of progressive water waves. The normal pressure distribution and the structure of the velocity profile immediately above progressive water waves are investigated.
A wind-wave facility 115 feet long, 74½ inches high, and 35½ inches wide is used which is equipped with an oscillatmg-plate wave generator. Velocities up to 80 fps can be obtained at a nominal water depth of 3 feet.
An oscillating device (or wave follower) was designed and built, on which a pressure sensor could be mounted and could be held at a fixed distance (within ¼ inch) above progressive water waves at all times.
The results indicate that a pressure shift does exist as predicted by Miles [1957] within the assumptions of the theory. Furthermore, the results demonstrate clearly the importance of using a pressure sensor which follows the water surface in obtaining meaningful pressures at the air-water interface. Mean velocity profiles with and without mechanically generated waves were obtained. Contrary to what is normally assumed, the results indicate that the boundary layer in the vicinity of water waves is affected by the presence of waves.
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Published In
Coastal Engineering 1966
Pages: 396 - 417
Copyright
© 1967 American Society of Civil Engineers.
History
Published online: Dec 31, 2015
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Authors
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Omar H. Shemdin
Acting Assistant Professor, Stanford University Stanford, California
En Yun Hsu
Associate Professor, Stanford University Stanford, California
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