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Author : Albert E. Browder
Publisher :
ISBN 13 :
Total Pages : 276 pages
Book Rating : 4.3/5 (121 download)
Download or read book Numerical Simulation of Mean Cross-shore Currents written by Albert E. Browder and published by . This book was released on 2000 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Antonio Fernando Garcez Faria
Publisher :
ISBN 13 :
Total Pages : 52 pages
Book Rating : 4.:/5 (318 download)
Download or read book A Simple Quasi-three Dimensional Model of Longshore Currents Over Arbitrary Profile written by Antonio Fernando Garcez Faria and published by . This book was released on 1995 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The long shore current maximum observed in the trough of a barred beach during the nearshore dynamics experiment DELILAH at Duck, North Carolina, is not predicted by present theory. The simplest longshore curren models balance cross-shore changes in the alongshore wave momentum (radiation stress) with the alongshore bottom shear stress. Waves break over the bar, reform in the trough and again break on the foreshore resulting in changes in the radiation stress, which predicts two jets, one over the bar and the other at the foreshore, which does not agree with the observed current maximum in the trough. The advection of the momentum of the longshore current by mean cross-shore currents as a source of momentum mixing is investigated. The longshore current is strongest toward the surface and decreasing to zero at the bottom. The cross-shore mean current has an onshore transport in the wave crest/trough region and an offshore transport beneath (undertow). The net interaction can induce significant lateral mixing of the alongshore momentum of the mean currents, which is shown using a simplified three- dimension model of nearshore currents to explain much of the differences with observations.
Author :
Publisher :
ISBN 13 :
Total Pages : 12 pages
Book Rating : 4.:/5 (227 download)
Download or read book Numerical Simulation of Cross-Shelf Exchange and Mixing in the Coastal Transition Zone written by and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: The long-term goals of our coastal research at Rutgers include: (1) the implementation and testing of numerical models suitable for regional problems featuring irregular coastlines, steep topography, and strong coastal/deep ocean interaction; (2) the use of these models to simulate the regional response of coastal currents, fronts and eddies in the California Current System; (3) the simulation of storm-driven sediment transport and wind-driven upwelling in the Middle Atlantic Bight; (4) the determination of the local balances of heat, mass and energy in these regions, including the patterns and methods of their exchange across the shelf/deep ocean boundary; and (5) the application of these regional models to the study of coupled physical/biogeochemical processes.
Author : David H. Katzev
Publisher :
ISBN 13 :
Total Pages : 234 pages
Book Rating : 4.:/5 (31 download)
Download or read book Simulation of Coastal Processes in a Circular Wave Basin written by David H. Katzev and published by . This book was released on 1992 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: The circular wave basin provides a means of physically modeling the nearshore without the typical problems associated with end walls. Three different coastal processes were examined to demonstrate the use of a spiral wavemaker in a circular wave basin. These were longshore currents, shear waves, and groin circulation. A beach was designed and constructed to concentrate breaking in a narrow region and minimize wave reflection. Currents in the longshore direction were generated by both the motion of the wavemaker and oblique wave approach. Two methods for measuring nearshore currents were employed. First, a 3-D acoustic current meter was positioned at various locations in the cross shore and the local radial and tangential velocities were recorded. Second, a video camera was placed approximately 8 meters above the wave basin to record the motion of a ball in the nearshore. The video tape was digitized by an image processor and the motion of the ball was determined. Measurements of nearshore circulation in the circular wave basin were used to investigate longshore currents, shear waves, and groin circulation. Average measured longshore current profiles in the cross shore were compared with numerical model predictions. An analysis of the existence of shear waves in the circular wave basin was performed by calculating longshore and cross shore current spectra. Particular attention was focused on the low frequency end of the spectra where shear waves are most energetic. Model groins were placed in the circular wave basin and measured currents were compared to predicted circulation patterns. All three applications indicated that the circular wave basin is a useful device for simulating coastal processes in a laboratory environment.
Author : Jane M. Smith
Publisher :
ISBN 13 :
Total Pages : 444 pages
Book Rating : 4.:/5 (359 download)
Download or read book Time- and Depth-varying Cross-shore Currents written by Jane M. Smith and published by . This book was released on 1996 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Brian K. Haus
Publisher :
ISBN 13 :
Total Pages : 282 pages
Book Rating : 4.3/5 (91 download)
Download or read book Simulation of Nearshore Directional Waves and Depth-averaged Currents written by Brian K. Haus and published by . This book was released on 1992 with total page 282 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Antonio Fernando Garcez Faria
Publisher :
ISBN 13 :
Total Pages : 182 pages
Book Rating : 4.:/5 (318 download)
Download or read book Nearshore Currents Over a Barred Beach written by Antonio Fernando Garcez Faria and published by . This book was released on 1997 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this dissertation is to develop numerical models and compare their predictions with data acquired during the DUCK94 experiment in order to improve our physical understanding of the hydrodynamic processes governing the vertical and cross shore distributions of both longshore and cross shore currents over a barred beach. The vertical structure of the mean longshore current is found to be well described by a logarithmic profile and a relationship between bed shear stress and bottom roughness, including the influence of ripples and mega-ripples, was also found. The vertical structure of the mean cross shore current (undertow) is modeled using an eddy viscosity closure scheme to solve for the turbulent shear stress and includes contributions from breaking wave rollers. These models of the vertical profiles of longshore and cross shore mean currents are combined to formulate a quasi three dimensional model to describe the cross shore distribution of the longshore current. This model includes turbulent mixing due to the cross shore advection of mean momentum of the longshore current by the mean cross shore current and contributions from wave rollers.
Author : John Casey Church
Publisher :
ISBN 13 :
Total Pages : 140 pages
Book Rating : 4.:/5 (318 download)
Download or read book Topics in Longshore Currents written by John Casey Church and published by . This book was released on 1993 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: The momentum equation governing mean longshore currents on straight beaches is a balance of forcing from the momentum transfer of the oscillatory wave motion, turbulent momentum transfer (mixing), and bottom stress. Of these, the wave's contribution is well understood, but the remaining two are not, principally due to the complicated hydrodynamics of the surf-zone. Addressing the bottom stress term, a longshore current model is developed which includes a modification of the bottom stress due to the effects of breaking-wave induced turbulence. A one-dimensional turbulent kinetic energy equation is used to model this breaking-wave induced turbulence, producing a spatially varying bottom friction coefficient. The modeled longshore current cross-shore profiles show improved agreement with field observations. In a second bottom stress study, vertical profiles of mean longshore currents are examined using field data obtained with vertically stacked electromagnetic current meters with the goal of measuring the bottom stress and its associated drag coefficient. The profiles are observed to become vertically uniform whenever the ratio of wave height to depth exceeds 0.3, indicating that nearly all of the waves passing a given location are breaking. Finally, horizontal turbulent momentum transfer (mixing) is examined for the case of shear instabilities of the longshore current.
Author : Cyril Jerome Galvin
Publisher :
ISBN 13 :
Total Pages : 108 pages
Book Rating : 4.:/5 (359 download)
Download or read book Experimental Study of Longshore Currents on a Plane Beach written by Cyril Jerome Galvin and published by . This book was released on 1965 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jianhua Tao
Publisher : Springer Nature
ISBN 13 : 9811528411
Total Pages : 482 pages
Book Rating : 4.8/5 (115 download)
Download or read book Numerical Simulation of Water Waves written by Jianhua Tao and published by Springer Nature. This book was released on 2020-03-30 with total page 482 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book discusses the numerical simulation of water waves, which combines mathematical theories and modern techniques of numerical simulation to solve the problems associated with waves in coastal, ocean, and environmental engineering. Bridging the gap between practical mathematics and engineering, the book describes wave mechanics, establishment of mathematical wave models, modern numerical simulation techniques, and applications of numerical models in engineering. It also explores environmental issues related to water waves in coastal regions, such as pollutant and sediment transport, and introduces numerical wave flumes and wave basins. The material is self-contained, with numerous illustrations and tables, and most of the mathematical and engineering concepts are presented or derived in the text. The book is intended for researchers, graduate students and engineers in the fields of hydraulic, coastal, ocean and environmental engineering with a background in fluid mechanics and numerical simulation methods.
Author : Jane Mckee Smith
Publisher : World Scientific
ISBN 13 : 9814480525
Total Pages : 4836 pages
Book Rating : 4.8/5 (144 download)
Download or read book Coastal Engineering 2004 - Proceedings Of The 29th International Conference (In 4 Vols) written by Jane Mckee Smith and published by World Scientific. This book was released on 2005-04-08 with total page 4836 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive and up-to-date volume contains 367 papers presented at the 29th International Conference on Coastal Engineering, held in Lisbon, Portugal, 19-24 September 2004. It is divided into five parts: waves; long waves, nearshore currents, and swash; sediment transport and morphology; coastal management, beach nourishment, and dredging; coastal structures. The contributions cover a broad range of topics including theory, numerical and physical modeling, field measurements, case studies, design, and management. Coastal Engineering 2004 provides engineers, scientists, and planners state-of-the-art information on coastal engineering and coastal processes.The proceedings have been selected for coverage in:
Author : Junwoo Choi
Publisher :
ISBN 13 :
Total Pages : 542 pages
Book Rating : 4.:/5 (545 download)
Download or read book Numerical Simulations for Mean Nearshore Current and Shear Waves of the Sandyduck written by Junwoo Choi and published by . This book was released on 2004 with total page 542 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Robert E. Whitaker
Publisher :
ISBN 13 :
Total Pages : 464 pages
Book Rating : 4.:/5 (318 download)
Download or read book An Analysis of Drag Coefficient at Hurricane Windspeeds from a Numerical Simulation of Dynamical Water Level Changes in Lake Okeechobee, Florida written by Robert E. Whitaker and published by . This book was released on 1975 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Nguyen Trung Viet
Publisher : Springer Nature
ISBN 13 : 9811502919
Total Pages : 1483 pages
Book Rating : 4.8/5 (115 download)
Download or read book APAC 2019 written by Nguyen Trung Viet and published by Springer Nature. This book was released on 2019-09-25 with total page 1483 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents selected articles from the International Conference on Asian and Pacific Coasts (APAC 2019), an event intended to promote academic and technical exchange on coastal related studies, including coastal engineering and coastal environmental problems, among Asian and Pacific countries/regions. APAC is jointly supported by the Chinese Ocean Engineering Society (COES), the Coastal Engineering Committee of the Japan Society of Civil Engineers (JSCE), and the Korean Society of Coastal and Ocean Engineers (KSCOE). APAC is jointly supported by the Chinese Ocean Engineering Society (COES), the Coastal Engineering Committee of the Japan Society of Civil Engineers (JSCE), and the Korean Society of Coastal and Ocean Engineers (KSCOE).
Author : Edward B. Thornton
Publisher :
ISBN 13 :
Total Pages : 1102 pages
Book Rating : 4.:/5 (318 download)
Download or read book Coastal Dynamics '97 written by Edward B. Thornton and published by . This book was released on 1998 with total page 1102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over 100 field, laboratory, theoretical, and numerical studies focus narrowly on natural shorelines and adjacent regions. They consider such aspects as sand suspension, wave propagation in shallow water, boundary layers and mixing, sediment transport predictors, remote sensing and video, wave-current interaction, longshore currents, beach profiles, rip currents, effects of coastal structures, beach nourishment, morphodynamic modelling, tidal inlets, wave-induced circulation, shingle and mixed grain size, breaking waves, megaripples and bars, nearshore circulation patterns, regional studies, long-term morphodynamics, swash and intertidal, groupiness and long waves, and seabed effects. The reproduced typescripts are in a variety of type styles. Only names are indexed. Annotation copyrighted by Book News, Inc., Portland, OR
Author : V.C. Lakhan
Publisher : Elsevier
ISBN 13 : 0080526640
Total Pages : 614 pages
Book Rating : 4.0/5 (85 download)
Download or read book Advances in Coastal Modeling written by V.C. Lakhan and published by Elsevier. This book was released on 2003-10-24 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book unifies and enhances the accessibility of contemporary scholarly research on advances in coastal modeling. A comprehensive spectrum of innovative models addresses the wide diversity and multifaceted aspects of coastal research on the complex natural processes, dynamics, interactions and responses of the coastal supersystem and its associated subsystems. The twenty-one chapters, contributed by internationally recognized coastal experts from fourteen countries, provide invaluable insights on the recent advances and present state-of-the-art knowledge on coastal models which are essential for not only illuminating the governing coastal process and various characteristics, but also for understanding and predicting the dynamics at work in the coastal system. One of the unique strengths of the book is the impressive and encompassing presentation of current functional and operational coastal models for all those concerned with and interested in the modeling of seas, oceans and coasts. In addition to chapters modeling the dynamic natural processes of waves, currents, circulatory flows and sediment transport there are also chapters that focus on the modeling of beaches, shorelines, tidal basins and shore platforms. The substantial scope of the book is further strengthened with chapters concentrating on the effects of coastal structures on nearshore flows, coastal water quality, coastal pollution, coastal ecological modeling, statistical data modeling, and coupling of coastal models with geographical information systems.
Author : Taerim Kim
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.3/5 (121 download)
Download or read book Numerical Modeling of Nearshore Morphological Changes Under Current-wave Field written by Taerim Kim and published by . This book was released on 1995 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
