Download or read book Laboratory Studies of Wind wave Interactions written by Jin Wu and published by . This book was released on 1967 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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).
Download or read book A Laboratory Study of Wind Wave Current Interaction written by Richard S. Scotti and published by . This book was released on 1976 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report studies the effect of wind and a spatially varying subsurface current field on both the wind-induced drift layer and the surface-wave spectrum. Steady state wind-wave-current interactions were established over a region of uniform current gradients which simulated an internal-wave-fixed measuring system. Wave-height spectra were recorded while wave-slope spectra were simultaneously made.
Download or read book A Laboratory Study of Wind Wave Current Interactions Part I written by and published by . This book was released on 1975 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two series of experiments were performed to study the interactions between both the wind-induced drift layer and the surface wave spectrum and a spatially varying subsurface current field. In the first, measurements were made of the response of the drift layer and surface wave spectrum to an appreciable, but unknown, current gradient. This was accomplished by forcing the current from a 90 cm-deep diffuser section onto a 68.7 cm-deep flat beach. The flow, thereby, experienced a current gradient which diminished to, and remained essentially at, zero a short distance downstream of the beach leading edge. Relaxation times inferred from the data are on the order of 1 to 3 minutes. For the second test series, the beach was set at an angle of 2.65 deg to produce strain rates. Here again, the results indicate that the response of the drift layer lags behind that of the current, as strained by the beach. The measurements of surface wave spectra taken for each of the conditions tested are presently being analyzed in detail; however, some preliminary results are presented.
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 A Laboratory Study of Wind wave current Interactions written by Richard S. Scotti and published by . This book was released on 1975 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wind generated Waves for Laboratory Studies written by D. Lee Harris and published by . This book was released on 1976 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Criterion for Determining Air flow Separation from Wind Waves written by Jin Wu and published by . This book was released on 1969 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on laboratory studies of wind-wave interactions, a criterion for determining air-flow separation from wind waves is proposed. The air separates from waves having a phase velocity less than the shear velocity, which characterizes the turbulent wind field. The successful application of this criterion to the analysis of oceanic data is herewith demonstrated. (Author).
Download or read book On Wind wave Interactions written by Jin Wu and published by . This book was released on 1969 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A criterion proposed earlier for determining air-flow separation from wind waves and a previously determined relationship between surface roughness and wind stress are herein correlated. The results indicate that the airflow boundary layer is developed due to the form drag provided by wavelets (surface roughness) superimposed on big waves. Based on the magnitudes of surface roughness, viscous-sublayer thickness and critical height, the mechanisms of wind-wave generation are discussed. (Author).
Download or read book Wind Over Wave Couplings written by S. G. Sajjadi and published by OUP Oxford. This book was released on 1999-04-29 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most familiar phenomena on the planet, water waves remain an elusive question for science. The way in which wind blows over water and causes waves is a very active area of research for applied mathematicians, as well as for oceanographers and engineers. The basic mechanisms are still a matter of controversy, although the use of modern techniques of asymptotic and non-linear analysis and large-scale computation, as well as experimental structures, are beginning to reveal the underlying mechanics. These studies are resulting in increasingly powerful methods of forecasting waves and of gauging and controlling their effects on such things as sediment, pollution, and offshore structures. This volume covers the wide range of current research on the relationship between wind and waves and includes contributions from many of the leading authorities in the field.
Download or read book Atmosphere ocean Interactions written by William Allan Perrie and published by WIT Press. This book was released on 2002 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: The increase in levels of population and human development in coastal areas has led to a greater importance of understanding atmosphere-ocean interactions. This second volume on atmosphere-ocean interactions aims to present several of the key mechanisms that are important for the development of marine storms.
Download or read book Laboratory Investigations on Air sea Interactions written by En Yun Hsu and published by . This book was released on 1970 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the comprehensive review on wind wave generation by Ursell in 1956, there have been renewed, intensive studies, theoretical as well as experimental on the subject. Although significant contributions have been made by many investigators, the final goal of achieving a basic understanding of the fundamental mechanism of energy transfer between a turbulent air stream and the ocean has not been realized. The dearth of systematic measurements taken under controlled conditions closely comparable to those of Miles' model was a motivation for our research program. Experiments were designed for measuring the wave induced perturbation pressure under steady-state and unsteady-state conditions. Other experiments were also devised for measuring growth of mechanically generated waves subjected to wind action. This paper presents a summary of the Stanford experimental data in the inviscid range, compares the Stanford data and other existing data to the theory, and suggests specific and fruitful avenues for further study. (Author).
Download or read book The Gravity capillary Wave Interaction Applied to Wind generated Short gravity Waves written by William J. Plant and published by . This book was released on 1979 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Wave Dynamics and Radio Probing of the Ocean Surface written by O. M. Phillips and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 677 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1960, Dr. George Deacon ofthe National Institute ofOceanography in England organized a meeting in Easton, Maryland that summarized the state of our understanding at that time of ocean wave statistics and dynamics. It was a pivotal occasion: spectral techniques for wave measurement were beginning to be used, wave-wave interactions hadjust been discovered, and simple models for the growth of waves by wind were being developed. The meeting laid the foundation for much work that was to follow, but one could hardly have imagined the extent to which new techniques of measurement, particularly by remote sensing, new methods of calculation and computation, and new theoretical and laboratory results would, in the following twenty years, build on this base. When Gaspar Valenzuela of the V. S. Naval Research Laboratory perceived that the time was right for a second such meeting, it was natural that Sir George Deacon would be invited to serve as honorary chairman for the meeting, and the entire waves community was delighted at his acceptance. The present volume contains reviewed and edited papers given at this second meeting, held this time in Miami, Florida, May 13-20, 1981, with the generous support of the Office of Naval Research, the National Aeronautics and Space Administration, and the National Oceanic and Atmospheric Administration.
Download or read book Wind Engineering written by International Association for Wind Engineering and published by Thomas Telford. This book was released on 1993 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume contains contributions on the following aspects of wind engineering research: wind-characteristics, exposure, simulation and environment; building aerodynamics, external and internal pressures; full-scale experiments; vehicle aerodynamics and dynamic response; mathematical modelling; aeroelastic instabilities; and more.
Download or read book The Regeneration of Surface Waves by Wind in Interactions with Internal Gravity Waves written by Owen M. Phillips and published by . This book was released on 1973 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Reference Publication written by and published by . This book was released on 1977 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Studies of Wind Waves written by Peter Pea-Shane Jen and published by . This book was released on 1974 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
