Download or read book Experimental Study of Water Waves Generated by Wind written by Andrey Zavadsky and published by . This book was released on 2017 with total page 117 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of the Growth of Mechanically Generated Surface Water Waves when Subjected to a Fully Developed Turbulent Channel Airflow written by W. Stanley Wilson and published by . This book was released on 1972 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental study was conducted to measure the growth rates of mechanically generated surface water waves when subjected to fully developed turbulent channel airflow. The study was designed to test the accuracy of the growth rates predicted by the Miles; 1962 Theory. (Author).
Download or read book Experimental Study of the Initial Stages of Water Waves Generation by Wind written by Dan Liberzon and published by . This book was released on 2010 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Interaction of Ocean Waves and Wind written by Peter Janssen and published by Cambridge University Press. This book was released on 2004-10-28 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book was published in 2004. The Interaction of Ocean Waves and Wind describes in detail the two-way interaction between wind and ocean waves and shows how ocean waves affect weather forecasting on timescales of 5 to 90 days. Winds generate ocean waves, but at the same time airflow is modified due to the loss of energy and momentum to the waves; thus, momentum loss from the atmosphere to the ocean depends on the state of the waves. This volume discusses ocean wave evolution according to the energy balance equation. An extensive overview of nonlinear transfer is given, and as a by-product the role of four-wave interactions in the generation of extreme events, such as freak waves, is discussed. Effects on ocean circulation are described. Coupled ocean-wave, atmosphere modelling gives improved weather and wave forecasts. This volume will interest ocean wave modellers, physicists and applied mathematicians, and engineers interested in shipping and coastal protection.
Download or read book An Experimental Study of Development of Wind Waves written by Tokuichi Hamada and published by . This book was released on 1963 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of Wind generated Waves with and Without Pressure Gradient written by Hui Chuan Liang and published by . This book was released on 1972 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of Wind wave Interactions written by Richard Ives Hires and published by . This book was released on 1968 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental investigation was made to determine the ratio of the wave-supported shear stress, phi sub w; to the total shear stress on the water surface, phi sub o. The experimental conditions were designed to correspond to those required for the application of the viscous shear flow theory of wave generation proposed by Brooke Benjamin (1959) and Miles (1962b). The experiments were performed in a wind-wave tunnel, 48 x 3-1/2 x 2 feet, with a mean water depth of 1-1/2 feet. The wind in the 6 in. air space above the water was fully-developed turbulent channel flow. The mean center-line wind speed, U sub xi, was kept constant at 1.20 m/s during all measurements made with the wind blowing over the water. An artificially generated, single-component, wave train of small amplitude provided a known, initial perturbation of the water surface with which the wind could interact. The range of wave frequencies investigated was from 4.0 to 5.2 cps. Wave measurements were made with capacitance wave probes, wind measurements with hot-wire anemometers. (Author).
Download or read book An Experimental Investigation of Wind generated Waves written by Joe William Johnson and published by . This book was released on 1951 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Investigation of the Structure of a Turbulent Wind Over Water Waves written by Susumu Karaki and published by . This book was released on 1968 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This investigation presents experimental results from a study of the structure of a turbulent boundary layer developed by air flow over water waves in a lab wind-wave channel. It was demonstrated that the sheared flow region is two-layered, similar to rough wall boundary layers. The inner layer, adjacent to the wall, is describable by the 'law of the wall' and the outer flow by the 'defect law.' The data were taken in two-dimensional flow with small favorable pressure gradients. The first part of the two-part investigation involved air flow over an initially still water surface on which waves developed in response to wind excitation. In the second part, air was passed over water waves of a single frequency and varied amplitude. The results indicated that within the range of this study the water surface can be classed as aerodynamically rough at wind speeds greater than 12 fps and the flow structure of the boundary layer corresponds to that over a rough wall. The velocity decrement due to surface roughness is shown to be a function of the local root-mean-square wave height. The effect of wave-induced fluctuations in the air is limited to a very close neighborhood of the wavy surface. For the specific combination of wind and wave speeds of this study it was found that while the amplitudes of the horizontal components of the fluctuation decreased with increasing elevation, the vertical component increased. (Author).
Download or read book An Experimental Study of Wind Waves and Swell in the Tropical North east Pacific Ocean written by I. M. Kabatchenko and published by . This book was released on 1989 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Introduction to Hydrodynamics and Water Waves written by Bernard LeMéhauté and published by . This book was released on 1969 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Study of Collective Sea State Modes of Deep Water Surface Gravity Waves written by Patricia A. Gill and published by . This book was released on 1994 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book An Experimental Study of Collective Sea State Modes of Deep Water Surface Gravity Waves written by Patricia A. Gill and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Waves in Oceanic and Coastal Waters written by Leo H. Holthuijsen and published by Cambridge University Press. This book was released on 2010-02-04 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: Waves in Oceanic and Coastal Waters describes the observation, analysis and prediction of wind-generated waves in the open ocean, in shelf seas, and in coastal regions with islands, channels, tidal flats and inlets, estuaries, fjords and lagoons. Most of this richly illustrated book is devoted to the physical aspects of waves. After introducing observation techniques for waves, both at sea and from space, the book defines the parameters that characterise waves. Using basic statistical and physical concepts, the author discusses the prediction of waves in oceanic and coastal waters, first in terms of generalised observations, and then in terms of the more theoretical framework of the spectral energy balance. He gives the results of established theories and also the direction in which research is developing. The book ends with a description of SWAN (Simulating Waves Nearshore), the preferred computer model of the engineering community for predicting waves in coastal waters.
Download or read book An Experimental Investigation of Wind generated Surface Waves written by Harold von Neufville Flinsch and published by . This book was released on 1946 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An International Attempt to Understand Wind Generated Ocean Waves Part I the Experiment written by Timothy P. Barnett and published by . This book was released on 1970 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 2-year field study of the mechanisms of wind wave generation and dissipation has been conducted in the North Sea. The study is a multi-nation effort. The experimental techniques and layout are described. The quality and quantity of data collected were good in 1968 and excellent in 1969. The results derived from these data are not discussed. (Author).
Download or read book The Dynamics of Wind in the Vicinity of Progressive Water Waves written by Omar H. Shemdin and published by . This book was released on 1966 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 shows progressive water waves are investigated. The theory of Miles (1957) on the generation of surface waves by shear flows predicts a phase shift between the pressure distribution along a wavy surface and the wave itself. This shift becomes responsible for the transfer of energy from air to water due to normal pressure, thereby causing the waves to grow. An experimental verification of this theory is sought. The aerodynamic perturbation-pressure at the air-water interface was measured under two conditions: (1) the pressure sensor following the water surface and (2) the pressure sensor fixed in space above the crest. The results indicate that a pressure shift does exist as predicted by Miles 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. The boundary layer above the water surface was also investigated and the results correlated with the measured pressures. Mean velocity profiles with and without mechanically-generated waves as well as instantaneous velocity profiles above the crest and trough of a mechanically-generated wave were obtained. Contrary to what is normally assumed, the results indicate that there exists a difference in structure between the boundary layer in the vicinity of water waves and that along a flat plate.
