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Hybrid Computer Simulation Of Wind Driven Ocean Currents
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Book Synopsis Hybrid Computer Simulation of Wind-driven Ocean Currents by : Francis Joseph Vithayathil
Download or read book Hybrid Computer Simulation of Wind-driven Ocean Currents written by Francis Joseph Vithayathil and published by . This book was released on 1974 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simulation method using a hybrid computer is developed in this dissertation to enhance the study of wind-driven ocean circulation. The simulation is based on the mathematical model developed by Ekman. Pure digital simulation is not economical due to excessive computer time required for the solution of the partial differential equations in the model. The ability of the analog section in the hybrid computer to solve differential equations rapidly and the data handling capability and programming simplicity of the digital section are utilized in the hybrid simulation. The results of the computer simulation for the simplified case of a step-function change in wind show good agreement with the results obtained by other investigators. Time-series wind data measured from a fixed buoy were used to calculate the wind stress, which formed the input to the computer model. Ocean current data taken concurrently with the wind data were used for comparison with the simulation results. Spectral analysis of the current meter record revealed the presence of diurnal and semidiurnal tidal components along with the wind driven currents. For comparison purposes, the major tidal influence from one of the current data series was filtered out by digital methods. Using only an average value for the eddy viscosity coefficient, it was found possible to reproduce some of the features of the measured currents in the computer model. For example, both the measured and simulated currents showed inertial oscillations. A simple parameter optimization scheme to determine the value of eddy viscosity coefficient was performed to demonstrate the power of the hybrid simulation in the estimation of unknown parameters in the mathematical model for the wind-driven currents.
Book Synopsis Wind-driven Ocean Circulation by : Allan R. Robinson
Download or read book Wind-driven Ocean Circulation written by Allan R. Robinson and published by . This book was released on 1963 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ocean '74 written by and published by . This book was released on 1974 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind Driven Ocean Modeling and Ocean Model Development by : Alan J. Wallcraft
Download or read book Wind Driven Ocean Modeling and Ocean Model Development written by Alan J. Wallcraft and published by . This book was released on 1985 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical simulations were performed with a 0.2 deg, two layer, free surface, primitive equation, ocean circulation model of the Gulf of Mexico with a realistic bottom topography and coastline. As in previous simulations, with idealized bottom topography and coastline, realistic Loop Current behavior could be obtained without wind forcing and with constant inflow through the Yucatan Straits. However, simulations with both wind and port forcing showed significantly more variation than those with port forcing alone. A similiar two layer model was set up for a North Atlantic region, from 20N, 82W to 48N, 30W, on a 0.25 by 0.2 deg grid. A 'Black Box' multigrid package was prepared for solving finite difference Helmholtz's equations with staggered grid Neumann boundary conditions in nonrectangular regions. In semi-implicit free surface primitive equation ocean models, it is competitive with other powerful iterative methods but slower than the direct Capacitance Matrix Technique. Several wind stress data sets were prepared for use in ocean models, based on global analysis products from FNOC and NMC, regional analysis products from FNOC, and ship observations. These data sets have been used to drive ocean circulation model of the World Ocean, the Indian Ocean, the North Atlantic, and the Western Mediterranean Sea. Keywords: Loop Current; Helmholtz solver; Multigrid method; Multilinear regression; and Wind stresses.
Book Synopsis On Steady, Wind-driven Ocean Currents in a Stratified Model of Two Moving Layers by : Worth D. Nowlin
Download or read book On Steady, Wind-driven Ocean Currents in a Stratified Model of Two Moving Layers written by Worth D. Nowlin and published by . This book was released on 1965 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Considered are steady, wind-driven currents in a two-layer model ocean, confined within a rectangular basin with a horizontal sea bed. The horizontal velocities are assumed independent of elevation within each layer of this finite difference approximation to the continuously stratified real ocean. Neglecting nonlinear field accelerations, a frictional model for the entire basin is formulated which allows for vertical, but not horizontal, transfer of horizontal momentum due to turbulence. The exchange of horizontal momentum between layers and to the sea bed is provided through the assumption of interlayer and bottom stresses, which are assumed proportional to the vertical contrast of horizontal velocity across the appropriate interface. The constants of proportionality, which are estimated from considerations of the observed circulation, play decisive roles in controlling the circulation patterns within each layer and the internal dissipation of energy from the steady organized flow. The solution, obtained for a purely zonal wind stress which varies latitudinally as a cosine, depicts an anticyclonic circulation within the lower layer which is intensified more to the west than is the anticyclonic gyre within the upper layer. Numerical calculations were performed for a range of physical parameters. ...
Book Synopsis A Numerical Approach to Wind-driven Ocean Circulation by : Donald Greenspan
Download or read book A Numerical Approach to Wind-driven Ocean Circulation written by Donald Greenspan and published by . This book was released on 1972 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Calculation of Wind-driven Surface Currents in the North Atlantic Ocean by : Thomas H. Rees
Download or read book Calculation of Wind-driven Surface Currents in the North Atlantic Ocean written by Thomas H. Rees and published by . This book was released on 1976 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Annotated Bibliographies of Simulation by :
Download or read book Annotated Bibliographies of Simulation written by and published by . This book was released on 1974 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Computational Science – ICCS 2009 by : Gabrielle Allen
Download or read book Computational Science – ICCS 2009 written by Gabrielle Allen and published by Springer. This book was released on 2009-05-20 with total page 1030 pages. Available in PDF, EPUB and Kindle. Book excerpt: “There is something fascinating about science. One gets such wholesale returns of conjecture out of such a tri?ing investment of fact. ” Mark Twain, Life on the Mississippi The challenges in succeeding with computational science are numerous and deeply a?ect all disciplines. NSF’s 2006 Blue Ribbon Panel of Simulation-Based 1 Engineering Science (SBES) states ‘researchers and educators [agree]: com- tational and simulation engineering sciences are fundamental to the security and welfare of the United States. . . We must overcome di?culties inherent in multiscale modeling, the development of next-generation algorithms, and the design. . . of dynamic data-driven application systems. . . We must determine better ways to integrate data-intensive computing, visualization, and simulation. - portantly,wemustoverhauloureducationalsystemtofostertheinterdisciplinary study. . . The payo?sformeeting these challengesareprofound. ’The International Conference on Computational Science 2009 (ICCS 2009) explored how com- tational sciences are not only advancing the traditional hard science disciplines, but also stretching beyond, with applications in the arts, humanities, media and all aspects of research. This interdisciplinary conference drew academic and industry leaders from a variety of ?elds, including physics, astronomy, mat- matics,music,digitalmedia,biologyandengineering. Theconferencealsohosted computer and computational scientists who are designing and building the - ber infrastructure necessary for next-generation computing. Discussions focused on innovative ways to collaborate and how computational science is changing the future of research. ICCS 2009: ‘Compute. Discover. Innovate. ’ was hosted by the Center for Computation and Technology at Louisiana State University in Baton Rouge.
Book Synopsis Wind-driven Currents in a Sea Or Lake of Variable Depth by : Gene E. Birchfield
Download or read book Wind-driven Currents in a Sea Or Lake of Variable Depth written by Gene E. Birchfield and published by . This book was released on 1972 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Wind-Waves in Oceans by : Igor Lavrenov
Download or read book Wind-Waves in Oceans written by Igor Lavrenov and published by Springer Science & Business Media. This book was released on 2013-11-11 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of sea waves has always been in the focus of mankind's atten tion. This is attributed not only to a desire to understand the behaviour in seas and oceans, but also, it has some practical necessity. Developing up-to date wind wave numerical methods requires detailed mathematical modelling, starting with wave generation, development, propagation and transformation on the surface in different water areas under quasi-stationary conditions, up to a synthesis of climatic features observed under different wave generation conditions in oceans, sea or coastal areas. The present monograph considers wind waves in terms of the most general formulation of the problem as a probable hydrodynamic process with wide spatial variability. It ranges between the global scale of the oceans, whose typical size is comparable with the Earth's radius, to the regional and local scales of the seas, including water areas limited in space with significant current or depth gradients in coastal zones, where waves cease their existence having propagated tens of thousand miles.
Book Synopsis Wind Driven Ocean Circulation by : Allan R. Robinson
Download or read book Wind Driven Ocean Circulation written by Allan R. Robinson and published by . This book was released on 1963-06 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modelling Wind-driven Ocean Circulation by : Julian P. McCreary
Download or read book Modelling Wind-driven Ocean Circulation written by Julian P. McCreary and published by . This book was released on 1980 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Selected Water Resources Abstracts by :
Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1977 with total page 802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Dissertation Index by :
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1984 with total page 760 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis and Simulation of Wind-driven Currents During the Mixed Layer Experiment (MILE) by : Jose M. Fernandez Lopez
Download or read book Analysis and Simulation of Wind-driven Currents During the Mixed Layer Experiment (MILE) written by Jose M. Fernandez Lopez and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The wind stress calculated from wind velocities measured during the Mixed Layer Experiment (MILE) was used as input to a one-dimensional wind-drive current model. These model results are compared with observed currents for the MILE-1 bouy, showing a qualitative agreement. MILE was an examination of the upper ocean carried out near Ocean Weather Station Papa during a 20-day period, August and September of 1977, which was characterized by two major wind events. The observed currents have been analyzed to obtain information about their behaviour that could be used in the tuning of the model. for a simulation of the entire period the results are considered only satisfactory. (Author).
Book Synopsis Aquatic Sciences and Fisheries Abstracts by :
Download or read book Aquatic Sciences and Fisheries Abstracts written by and published by . This book was released on 1975-10 with total page 868 pages. Available in PDF, EPUB and Kindle. Book excerpt:
