Laboratory Studies of Wind Waves PDF Download
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Author: Peter Pea-Shane Jen
Publisher:
ISBN:
Category : Ocean-atmosphere interaction
Languages : en
Pages : 38
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Book Description
Author: Peter Pea-Shane Jen
Publisher:
ISBN:
Category : Ocean-atmosphere interaction
Languages : en
Pages : 38
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Book Description
Author: Osvald J. Sibul
Publisher: Forgotten Books
ISBN: 9781397356567
Category : Science
Languages : en
Pages : 44
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Book Description
Excerpt from Laboratory Study of the Generation of Wind Waves in Shallow Water The prediction of wave characteristics in shallow water is of great importance along much of the Gulf Coast of the United States, as well as for many inland water areas (as Lake Okeechobee, Florida). This has been difficult in the past as the effect of the shallow bottom is considerable, particularly in reducing the wave height from what would be expected by use of the deep water wave prediction methods. This report gives the results of some laboratory studies of wave generation in shallow water in a small enclosed wind-wave tank. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
Author: D. Lee Harris
Publisher:
ISBN:
Category : Ocean-atmosphere interaction
Languages : en
Pages : 52
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Book Description
Author: G. C Ralls (Jr)
Publisher:
ISBN:
Category : Ocean waves
Languages : en
Pages : 0
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Book Description
A laboratory program was undertaken (1) to determine the variation of wavelength, crest length, and wave velocity with fetch, water depth, and wind velocity; (2) to compare measured wave velocity with theory; and (3) to compare the results with those of 2-dimensional laboratory studies. Water depths from 0.5 to 2.5 in., wind speeds from 17 to 30 fps, and fetches from 0.5 to 10 ft were used. The still-water depth was checked, the fan was turned on, and the wind speed was adjusted for each run. The maximum wind velocity was recorded after steady-state wind conditions were reached, and motion pictures were then taken of about 12 successive waves crossing the field of view of the camera. There appeared to be no definite pattern to the waves. Three methods were used to obtain quantitative information on the short-crested pattern. A method analogous to the statistical method used to describe wavelength in the 2-dimensional model was most useful. Both crest length and wavelength had Gaussian distributions. The short-crested wave theory of Fuchs (NBS Circular No. 521, p. 187-200, Nov. 1952) predicted the measured wave velocities with a maximum deviation of 15%. An average deviation of 10% was obtained when the line intersection distribdtion method was used to determine the crest and wavelengths.
Author: Osvald Sibul
Publisher:
ISBN:
Category : Wind waves
Languages : en
Pages : 80
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Book Description
Author: G. C. Ralls
Publisher:
ISBN:
Category : Water waves
Languages : en
Pages : 36
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Book Description
Author: G. C. Ralls
Publisher:
ISBN:
Category : Ocean waves
Languages : en
Pages : 28
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Book Description
A laboratory program was undertaken (1) to determine the variation of wavelength, crest length, and wave velocity with fetch, water depth, and wind velocity; (2) to compare measured wave velocity with theory; and (3) to compare the results with those of 2-dimensional laboratory studies. Water depths from 0.5 to 2.5 in., wind speeds from 17 to 30 fps, and fetches from 0.5 to 10 ft were used. The still-water depth was checked, the fan was turned on, and the wind speed was adjusted for each run. The maximum wind velocity was recorded after steady-state wind conditions were reached, and motion pictures were then taken of about 12 successive waves crossing the field of view of the camera. There appeared to be no definite pattern to the waves. Three methods were used to obtain quantitative information on the short-crested pattern. A method analogous to the statistical method used to describe wavelength in the 2-dimensional model was most useful. Both crest length and wavelength had Gaussian distributions. The short-crested wave theory of Fuchs (NBS Circular No. 521, p. 187-200, Nov. 1952) predicted the measured wave velocities with a maximum deviation of 15%. An average deviation of 10% was obtained when the line intersection distribdtion method was used to determine the crest and wavelengths.
Author: Gordon Corey Ralls
Publisher:
ISBN:
Category : Wind waves
Languages : en
Pages : 76
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Book Description
Author: Blair Kinsman
Publisher: Courier Corporation
ISBN: 0486646521
Category : Science
Languages : en
Pages : 706
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Book Description
In this classic study, a renowned student of ocean wave theory examines the data requirements and details of the power spectral analysis required to make the wave revolution intelligible. Although the discussions center on waves, once the techniques are understood, they can be applied to many other areas. After outlining the nature of waves and wave processes and their methods of measurement and classification, the author provides a detailed exploration that relies heavily on mathematical models. Topics include perturbations of irrotational motion, energy considerations, wave generations by wind, and much more. The text is enhanced and clarified by 270 photos, figures, and tables. A helpful bibliography and indexes conclude this indispensable addition to the oceanographer's library.
Author: Jin Wu
Publisher:
ISBN:
Category : Wave-motion, Theory of
Languages : en
Pages : 98
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Book Description
It is confirmed that the velocity distribution essentially follows the logarithmic law near the water surface and the velocity-defect law toward the outer edge of the boundary layer. Calculated from these distributions, the wind stresses and surface roughnesses are divided into two groups separated by the occurrence of wave-breaking phenomenon. For sufficiently low wind velocity, U, the surface roughness is dictated by ripples and the wind-stress coefficient varies with U to the -1/2 power. The average height of the basic gravity wave is proportional to the surface roughness at higher wind velocities; the stress coefficient is then proportional to U. In addition, it is found that the Charnock's expression holds only at high wind velocities, and that the constant of proportionality determined from the experiment correlates very well with the field observations. Finally, the wind-stress coefficient is shown to be larger than the friction coefficient for turbulent flow along a solid rough surface; the difference is shown to be the wave drag of the wind over the water surface. (Author).
