An experimental study of collective sea state modes of deep water surface gravity waves

Download
Author
Gill, Patricia A.
Date
1994-06Advisor
Keolian, Robert
Hofler, Thomas J.
Larraza, A.
Second Reader
NA
Metadata
Show full item recordAbstract
Experimental tests of the theory of collective sea state modes of deep water surface gravity waves were made in a 20 meter long, 1.1 meter wide wind-wave tank. First, bursts of broadband wave energy were injected into the upwind end of the tank with a paddle. According to wave turbulence theory and previous experiments, it is expected that the collective mode can be seen as a change in the wind generated background spectral density propagating down the tank. The collective mode is expected to give an anomalous phase shift between the wind generated waves and the lowest tank modes. A series of experiments were conducted to measure the phase of the lowest oscillatory modes of the tank at which increases in the magnitude of wind generated waves occurred. Finally, the surface tension of water in the tank was measured in order to better characterize our system. Although our experiments suggest that the collective mode may indeed exist, the results, so far, remain inconclusive.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.Collections
Related items
Showing items related by title, author, creator and subject.
-
Collective security as a means for regional stability in Northeast Asia
Park, Changhee (Monterey, California. Naval Postgraduate School, 1996-12);This thesis evaluates the applicability of a collective security system to Northeast Asian states as a means for regional stability in the future. The current bilateral security system will not fit with the future security ... -
Collective action in the armed forces of the United States.
Creel, John B. (Naval Postgraduate School, 1978);growing need among service personnel to take collective action to protect their social and economic status appears to have developed during the last decade. Past studies of this phenomenon have been, for the most part, ... -
Combatting maritime piracy
Cobb, Christopher B. R. (Monterey, California. Naval Postgraduate School, 1994-12);In the past six years, acts of maritime piracy have been occurring with increasing frequency in many regions of the world. Adverse effects from these attacks are suffered not just by elements of the shipping industry but, ...