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On the variation and growth of wave-slope spectra in the capillary-gravity range with increasing windA new laser device has been used to make direct wave-slope measurements in the capillary-gravity range. Owing to the design principles, the digital nature of the system and the use of a laser beam as a probe, the earlier problems of intensity variations and meniscus effects were avoided. Using this new technique, wave-slope spectra both down and across the channel were obtained for different wind conditions, along with corresponding mean-square slope values. Comparisons are made with existing data. The results indicate that a quasi-equilibrium state may exist for each wind speed and that it increases in intensity with increasing wind, which may imply an asymptotic nature for the equilibrium-range coefficient. From the data, two significant frictional velocities, 17.5 and 31 cm/s respectively, are identified as critical values for different ranges of wave development.
Document ID
19770030462
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Long, S. R.
(NASA Wallops Flight Center Wallops Island, Va.; North Carolina State University, Raleigh, N.C., United States)
Huang, N. E.
(NASA Wallops Flight Center Applied Science Directorate, Wallops Island, Va., United States)
Date Acquired
August 9, 2013
Publication Date
September 24, 1976
Publication Information
Publication: Journal of Fluid Mechanics
Volume: 77
Subject Category
Oceanography
Accession Number
77A13314
Funding Number(s)
CONTRACT_GRANT: NAS6-2617
Distribution Limits
Public
Copyright
Other

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