"An experiment was conducted to study the coupled parallel and unidirectional effect of wind and waves on surface drift velocity of oil lenses and flexible plastic floats. The experiment was also conducted to study the effect of float width, wave length and air turbulence on the drift velocity of the surface floats. Experiments were also conducted to determine the air flow characteristics of the wind tunnel test section.
Experimental results are presented for a free stream wind velocity from zero to 700 cm/sec; the wave steepness ranged from zero to 0. 069, which is near the maximum steepness for stable gravity waves. This represents the entire range of possible wave steepness, and probably the range of possible wind speeds which can practically be studied. The results show that the wind drift and wave drift mechanisms are not simply additive over all regimes of wind speed. At low wind speeds the wave drift is shown to provide an augmentation to the wind drift. However, at higher wind speeds, the waves cause a net decrease in the coupled drift velocity. In fact, this wave induced diminishment increases as the wind speed increases.
It was found that drift characteristics of an oil lens and a flexible plastic float were the same. The drift velocity of a flexible plastic float was found to be independent of the width of the float. The wave length was discovered to have a minimal effect on the air-water interface and only the wave steepness H/L was important. Air turbulence intensity had no effect on drift velocity with either smooth water or with wind and waves coupled together. Air velocity profiles at the center of the wind tunnel, for different mean wind velocities, were flat and uniform across a major portion wind tunnel. This effect was achieved by not having fully developed flow in the test section. This condition more closely simulates the conditions on the open ocean"--Abstract, page i.
Reisbig, R. L.
Flanigan, V. J.
Cunningham, Floyd M.
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
United States. Coast Guard
University of Missouri--Rolla
v, 47 pages
© 1973 Rameshchandra C. Shah, All rights reserved.
Thesis - Restricted Access
Library of Congress Subject Headings
Drift waves -- Measurement
Print OCLC #
Electronic OCLC #
Link to Catalog RecordElectronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library. http://laurel.lso.missouri.edu/record=b1066733~S5
Shah, Rameshchandra C., "An experiment to determine the coupled unidirectional effect of wind and waves on surface drift" (1973). Masters Theses. 3520.