Relevant bibliographies by topics / Speed. Ocean currents

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers

Academic literature on the topic 'Speed. Ocean currents'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Speed. Ocean currents"

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Chang, Yu-Chia, Ruo-Shan Tseng, Guan-Yu Chen, Peter C. Chu, and Yung-Ting Shen. "Ship Routing Utilizing Strong Ocean Currents." Journal of Navigation 66, no. 6 (2013): 825–35. http://dx.doi.org/10.1017/s0373463313000441.

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From the Surface Velocity Program (SVP) drifter current data, a detailed and complete track of strong ocean currents in the north-western Pacific is provided using the bin average method. The focus of this study is on the Kuroshio, the strong western boundary current of the North Pacific flowing northward along the east coast of Taiwan and then turning eastward off southern Japan. With its average flow speed of about 2 knots, the Kuroshio can significantly increase the ship's speed for a “super-slow-steaming” container ship travelling at speeds of 12 knots between the ports of Southeast Asia a
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Abdolali, Ali, and James T. Kirby. "TSUNAMI PHASE SPEED REDUCTION DUE TO WATER COMPRESSIBILTY." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 9. http://dx.doi.org/10.9753/icce.v36.currents.9.

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Most existing tsunami propagation models consider the ocean to be an incompressible, homogenous medium. Recently, it has been shown that a number of physical features can slow the propagation speed of tsunami waves, including wave frequency dispersion, ocean bottom elasticity, water compressibility and thermal or salinity stratification. These physical effects are secondary to the leading order, shallow water or long wave behavior, but still play a quantifiable role in tsunami arrival time, especially at far distant locations. In this work, we have performed analytical and numerical investigat
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Chang, Yu-Chia, Ruo-Shan Tseng, Peter C. Chu, and Huan-Jie Shao. "Global Energy-saving Map of Strong Ocean Currents." Journal of Navigation 69, no. 1 (2015): 75–92. http://dx.doi.org/10.1017/s0373463315000466.

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This study provides a global, detailed, and complete energy-saving map of strong ocean currents from the absolute geostrophic velocities calculated from satellite altimetry data, with the focus on the strong Western Boundary Currents (WBCs) in the global ocean. Theoretically, the WBCs with speeds of 2–3 knots can reduce fuel consumption by 25–50% for vessels at a sailing speed of 6 knots. The fuel savings are greater for a lower sailing speed than for a higher sailing speed. For about 1·8 million motorised fishing vessels with a lower ship speed, strong currents can evidently save fuel, time a
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Watts, D. Randolph, Maureen A. Kennelly, Kathleen A. Donohue, et al. "Four Current Meter Models Compared in Strong Currents in Drake Passage." Journal of Atmospheric and Oceanic Technology 30, no. 10 (2013): 2465–77. http://dx.doi.org/10.1175/jtech-d-13-00032.1.

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Abstract Seven current meters representing four models on a stiffly buoyed mooring were placed for an 11-month deployment to intercompare their velocity measurements: two vector-measuring current meters (VMCMs), two Aanderaa recording current meter (RCM) 11s, two Aanderaa SEAGUARDs, and a Nortek Aquadopp. The current meters were placed 6-m apart from each other at about 4000-m depth in an area of Drake Passage expected to have strong currents, nearly independent of depth near the bottom. Two high-current events occurred in bursts of semidiurnal pulses lasting several days, one with peak speeds
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Rajput, P., R. Ramakrishnan, and A. S. Rajawat. "Retrieval of coastal ocean currents using MCC technique on satellite imagery for supplementing altimeter derived currents." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-8 (December 23, 2014): 1483–89. http://dx.doi.org/10.5194/isprsarchives-xl-8-1483-2014.

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Maximum Cross Correlation (MCC) technique have been used to derive coastal currents from sequential OCM derived suspended sediment concentration (SSC) maps and the MCC currents are integrated with the Ocean surface current analysis-Real time (OSCAR) ocean currents along the coastal regions of the Southern India. OSCAR currents are mainly depended on the oceanographic measurements from the satellite altimeter which have limitations in the coastal region and in representing the mesoscale properties dominating the coastal ocean. Sequential pair of atmospherically corrected and georeferenced OCM i
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Jeong, Sang-Ki, Dea-Hyeong Ji, Ji-Youn Oh, Jung-Min Seo, and Hyeung-Sik Choi. "Disturbance learning controller design for unmanned surface vehicle using LSTM technique of recurrent neural network." Journal of Intelligent & Fuzzy Systems 40, no. 4 (2021): 8001–11. http://dx.doi.org/10.3233/jifs-189622.

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In this study, to effectively control small unmanned surface vehicles (USVs) for marine research, characteristics of ocean current were learned using the long short-term memory (LSTM) model algorithm of a recurrent neural network (RNN), and ocean currents were predicted. Using the results, a study on the control of USVs was conducted. A control system model of a small USV equipped with two rear thrusters and a front thruster arranged horizontally was designed. The system was also designed to determine the output of the controller by predicting the speed of the following currents and utilizing
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Hikmat, Yusiran, and Erwin Erwin. "STUDI EKSPERIMEN TEKNOLOGI PEMBANGKIT LISTRIK TENAGA ARUS LAUT (PLTAL) MENGGUNAKAN SAVONIUS BACH ROTOR." Komunikasi Fisika Indonesia 16, no. 2 (2019): 75. http://dx.doi.org/10.31258/jkfi.16.2.75-80.

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Design and experiment of ocean current power generation system have been carried out using the Bach Savonius rotor. In this research, the influence of the velocity of ocean currents, the number of turbine blades, and the blade arc angle of the generator output power are studied. The results showed that the turbine output power is strongly influenced by the velocity of ocean currents where the velocity values of ocean currents varied in the range 0,63-1,98 m/sec. The maximum elctrical power of the turbine occurs at a current velocity of 1,98 m/sec of 26,88 Watts. The number of turbine blades ha
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Korgen, Ben J. "Rule-of-Thumb Formulas for Extending the Versatility of Tidal Current Tables." Marine Technology Society Journal 34, no. 2 (2000): 18–21. http://dx.doi.org/10.4031/mtsj.34.2.2.

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Four rule-of-thumb formulas have been derived for use in conjunction with existing tidal current tables. For near-surface tidal currents, these formulas yield 1) the percent of time current speed is above a critical value, 2) the percent of time current speed is below a critical value, 3) the time interval when current speed is above a critical value, and 4) the time interval when current speed is below a critical value. The formulas presented require as inputs the near-surface tidal current speed predictions found in standard tidal current tables. Intended for making rough approximations, the
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Woodruff, India, James Kirby, Fengyan Shi, and Stephan Grilli. "ESTIMATING METEO-TSUNAMI OCCURRENCES FOR THE US EAST COAST." Coastal Engineering Proceedings, no. 36 (December 30, 2018): 66. http://dx.doi.org/10.9753/icce.v36.currents.66.

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Meteorological tsunamis, also called meteo-tsunamis, are significant ocean surface waves generated by atmospheric forcing. The waves typically result from energy transfer from atmosphere to ocean through the Proudman resonance phenomena, where translation speed of the storm system in the atmosphere coincides with the free wave speed of long surface waves. These tsunami-like waves can be hazardous, either through direct inundation of shorelines or through generation of harbor oscillations and other disruptions to maritime activities. The wide continental shelf bathymetry of the United States (U
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THOMAS, PETER J., and P. F. LINDEN. "Laboratory modelling of the effects of temporal changes of estuarine-fresh-water discharge rates on the propagation speed of oceanographic coastal currents." Journal of Fluid Mechanics 664 (November 29, 2010): 337–47. http://dx.doi.org/10.1017/s0022112010004702.

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In this paper, results of laboratory experiments simulating buoyancy-driven coastal currents produced by estuarine discharges into the ocean, are discussed. The responses of the propagation speeds of the currents to increases and decreases of the volumetric discharge rate at the source are investigated. For increasing discharge rate, we find that the mean speed of the current head displays a sharp rise some time after the source discharge condition has changed. In contrast, a decrease of the current speed following a decreasing discharge rate proceeds gradually. The current speed after acceler
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Dissertations / Theses on the topic "Speed. Ocean currents"

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de, Jesus Roland E. "A diagnostic study of the velocity structure of a meandering jet using a primitive equation model with dynamic mode initialization." Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA240687.

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Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, September 1990.<br>Thesis Advisor(s): Haney, R. L. ; Stanton, T. P. "September 1990." Description based on title screen viewed on December 17, 2009. DTIC Descriptor(s): Ocean currents, *fronts (oceanography), diagnosis(general), California, transitions, theses, mathematical models, vertical orientation. DTIC Identifier(s): California current, CTZ (California transition zone). Author(s) subject terms: Diagnostic model, California Current, CTZ, dynamical modes. Includes bibliographical references (p. 64-66). Also
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Buckley, Keith Allen. "Measurements of ocean currents across the continental margin off Pt. Sur, California, in January 1990." Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA246313.

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Thesis (M.S. in Meteorology and Physical Oceanography)--Naval Postgraduate School, December 1990.<br>Thesis Advisor(s): Collins, C. A. Second Reader: Garfield, Newell. "December 1990." Description based on title screen as viewed on April 01, 2010. DTIC Descriptor(s): Velocity, density, ocean currents, water, edges, acoustic waves, inshore areas, surfaces, profiles, California, acoustic equipment, geophysics, hydrographic surveying, doppler effect, east(direction), dropsondes, anomalies DTIC Identifier(s): Ocean currents, *ocean circulation, *oceanographic data, hydrographic surveying, water fl
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Hopkins, Alicia A. "Sensitivity of bottom topography on the dynamics and sound speed structure in the Northern Canary Current System." Thesis, Monterey, Calif. : Naval Postgraduate School, 2006. http://bosun.nps.edu/uhtbin/hyperion.exe/06Dec%5FHopkins.pdf.

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Thesis (M.S. in Meterology and Physical Oceanography)--Naval Postgraduate School, December 2006.<br>Thesis Advisor(s): Mary L. Batteen. "December 2006." Includes bibliographical references (p. 101-105). Also available in print.
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Bilale, Abudureheman. "State relativity and speed-allocated line-of-sight course control for path-following of underwater vehicles." Thesis, Cranfield University, 2018. http://dspace.lib.cranfield.ac.uk/handle/1826/13963.

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Path-following is a primary task for most marine, air or space crafts, especially during autonomous operations. Research on autonomous underwater vehicles (AUV) has received large interests in the last few decades with research incentives emerging from the safe, cost-effective and practical solutions provided by their applications such as search and rescue, inspection and monitoring of pipe-lines ans sub-sea structures. This thesis presents a novel guidance system based on the popular line-of-sight (LOS) guidance law for path-following (PF) of underwater vehicles (UVs) subject to environmental
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Li, Yuting. "Investigating sediment size distributions and size-specific Sm-Nd isotopes as paleoceanographic proxy in the North Atlantic Ocean : reconstructing past deep-sea current speeds since Last Glacial Maximum." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/273776.

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To explore whether the dispersion of sediments in the North Atlantic can be related to modern and past Atlantic Meridional Overturning Circulation (AMOC) flow speed, particle size distributions (weight%, Sortable Silt mean grain size) and grain-size separated (0–4, 4–10, 10–20, 20–30, 30–40 and 40–63 μm) Sm-Nd isotopes and trace element concentrations are measured on 12 cores along the flow-path of Western Boundary Undercurrent and in the central North Atlantic since the Last glacial Maximum (LGM). North Atlantic is a useful place to explore how size-specific sediment provenance is related to
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Compton, Andrea Jean. "The correlation of sea surface temperatures, sea level pressure and vertical wind shear with ten tropical cyclones between 1981-2010." Thesis, 2013. http://hdl.handle.net/1805/3669.

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Books on the topic "Speed. Ocean currents"

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Harrison, D. E. Model-data comparisons for the 1982-83 El Niño: The XBT tracks. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1988.

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Singer, Robin. The high speed buffer board: A SAIL EIA-485 communications accelerator card for the vector measuring current meter. Woods Hole Oceanographic Institution, 1990.

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S, Kessler William, Giese Benjamin S, and Pacific Marine Environmental Laboratory (U.S.), eds. Model-data comparisons for the 1982-83 El Niño: The XBT tracks. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1988.

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Model-data comparisons for the 1982-83 El Niño: The XBT tracks. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1988.

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Model-data comparisons for the 1982-83 El Niño: The XBT tracks. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1988.

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S, Kessler William, Giese Benjamin S, and Pacific Marine Environmental Laboratory (U.S.), eds. Model-data comparisons for the 1982-83 El Niño: The XBT tracks. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1988.

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Model-data comparisons for the 1982-83 El Niño: The XBT tracks. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1988.

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J, McPhaden Michael, та Pacific Marine Environmental Laboratory (U.S.), ред. EPOCS moored temperature, current, and wind measurements, 0ʻ́, 140ʻ́ W, May-June 1987. United States Department of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1988.

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Paul, Freitag H., McPhaden Michael J, and Pacific Marine Environmental Laboratory (U.S.), eds. Correcting moored ADCP data for fish-bias errors at 0p0s,110p0sW and 0p0s,140p0sW from 1990 to 1993. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Pacific Marine Environmental Laboratory, 1995.

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Paul, Freitag H., McPhaden Michael J, and Pacific Marine Environmental Laboratory (U.S.), eds. Correcting moored ADCP data for fish-bias errors at 0p0s,110p0sW and 0p0s,140p0sW from 1993 to 1995. U.S. Dept. of Commerce, National Oceanic and Atmospheric Administration, Oceanic and Atmospheric Research Laboratories, Pacific Marine Environmental Laboratory, 2000.

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Book chapters on the topic "Speed. Ocean currents"

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Millar, Dean L. "Wave and tidal power." In Energy... beyond oil. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780199209965.003.0006.

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This chapter reviews how electricity can be generated from waves and tides. The UK is an excellent example, as the British Isles have rich wave and tidal resources. The technologies for converting wave power into electricity are easily categorized by location type. 1. Shoreline schemes. Shoreline Wave Energy Converters (WECs) are installed permanently on shorelines, from where the electricity is easily transmitted and may even meet local demands. They operate most continuously in locations with a low tidal range. A disadvantage is that less power is available compared to nearshore resources because energy is lost as waves reach the shore. 2. Nearshore schemes. Nearshore WECs are normally floating structures needing seafloor anchoring or inertial reaction points. The advantages over shoreline WECs are that the energy resource is much larger because nearshore WECs can access long-wavelength waves with greater swell, and the tidal range can be much larger. However, the electricity must be transmitted to the shore, thus raising costs. 3. Offshore schemes. Offshore WECs are typically floating structures that usually rely on inertial reaction points. Tidal range effects are insignificant and there is full access to the incident wave energy resource. However, electricity transmission is even more costly. Tidal power technologies fall into two fundamental categories:1. Barrage schemes. In locations with high tidal range a dam is constructed that creates a basin to impound large volumes of water. Water flows in and out of the basin on flood and ebb tides respectively, passing though high efficiency turbines or sluices or both. The power derives from the potential energy difference in water levels either side of the dam. 2. Tidal current turbines. Tidal current turbines (also known as free flow turbines) harness the kinetic energy of water flowing in rivers, estuaries, and oceans. The physical principles are analogous to wind turbines, allowing for the very different density, viscosity, compressibility, and chemistry of water compared to air. Waves are caused by winds, which in the open ocean are often of gale force (speed &gt;14 m/s).
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Smith, Jason W. "The Common Highway." In To Master the Boundless Sea. University of North Carolina Press, 2018. http://dx.doi.org/10.5149/northcarolina/9781469640440.003.0004.

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This chapter examines the hydrographic work of the U.S. Naval Observatory and Hydrographical Office under the leadership of Lieutenant Matthew Fontaine Maury, 1842-1861, a tenure in which Maury brought the Navy to the forefront of antebellum American applied and theoretical science and embarked upon revolutionary new cartographic conventions in his Wind and Current Charts series. Maury pushed and considerably expanded the boundaries of the hydrographic chart to include wind speed, ocean temperature, ship tracks, and whales, among other things, creating a partnership with American and foreign mariners to collect and systematize data about the marine environment thereby significantly shortening the length of voyages under sail, and breaking down the rule-of-thumb navigational methods deeply-rooted in maritime culture. With Maury’s publication of The Physical Geography of the Sea in 1855, he became the intellectual and political rival and sometime enemy of key leaders in the American civilian scientific community. Nevertheless, this chapter argues that at a time when the U.S. Navy, the American maritime community, and civilian science were diverging, Maury was just the sort of figure who could bridge increasingly widening intellectual, cultural, and institutional gaps between them.
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Sryberko, Andrii. "ANALYSIS OF THE THERMOHALINE STRUCTURE IN THE ACTIVE LAYER OF THE MARINE ENVIRONMENT ACCORDING TO THE CALCULATED HYDROPHYSICAL CHARACTERISTICS BASED ON REMOTE MEASUREMENTS (ON THE EXAMPLE OF THE BLACK SEA)." In European vector of development of the modern scientific researches. Publishing House “Baltija Publishing”, 2021. http://dx.doi.org/10.30525/978-9934-26-077-3-6.

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Today, one of the priority scientific directions in marine sciences is the study of the spatial distribution of hydrophysical characteristics in the marine environment by remote measurements methods. To studying the spatio-temporal variability of water temperature and salinity in the active layer of the marine environment, it is necessary to use the data of their vertical and spatial distribution. Today there does not exist an easy way to get a in situ data for the analysis of the thermohaline structure in the marine environment. Indirect definitions of the vertical and spatial distribution of water temperature and salinity through the development of various methods for the calculation of thermohaline characteristics are used to date. Main purpose of this work is to study the thermohaline structure in the active layer of the Black Sea according to the calculated hydrophysical characteristics based on satellite and hydroacoustic data. The study of the vertical distribution of water temperature and salinity in the Black Sea was carried out in the deep-water part sea at standard levels (0, 10, 20, 25, 30, 50 meters) in the spring –autumn period. This area of research is represented by the highest number of measurements and is included in the Main Black Sea current zone. The calculations of thermohaline characteristics in the marine environment are based on the original methods of calculating the vertical distribution of water temperature, sound speed and salinity of water by satellite and hydroacoustic data. These methods were developed in the State Institute “Hydroacoustic Branch of Institute of Geophysics by S.I. Subbotin name of the National Academy of Sciences of Ukraine”. Mathematical and physical-statistical methods of calculation were used in the developed methods. For the efficiency of calculations an Automated Program Complex (APC) for calculating the vertical distribution of temperature and salinity fields in the marine environment by satellite and hydroacoustic data has been developed and tested on the example of the Black Sea. The initial data for the calculations using the APC are only daily satellite data of the sea surface temperature. Based on the results of calculations of the APC, maps of the vertical distribution of temperature and salinity of water on zonal and meridional sections in the Black Sea in the period of spring – autumn 2018 were developed. Analysis of the results of calculations of the vertical distribution of thermohaline characteristics made it possible to identify the main features in these distributions. The features of the spatial-temporal distribution of thermohaline parameters have been analysed. The confirmation of the state of the thermohaline regime inherent in the Black Sea in the warm season was obtained. The results of calculations of the vertical distribution of thermohaline characteristics in the Black Sea deep-water area on the basis of satellite and hydroacoustic data using the developed methods showed the possibility and expediency of their application in the layer 0-50 meters in the period May-October for a detailed analysis of the state of the thermohaline structure. The developed methods and principles of building an the APC for calculation of vertical distribution of temperature and salinity fields of water according to satellite and hydroacoustic data can be applied for analysis and monitoring of others water area of the World Ocean taking into account their hydrological conditions.
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Conference papers on the topic "Speed. Ocean currents"

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Winterstein, Steven R., Sverre Haver, Alok K. Jha, Borge Kvingedal, and Einar Nygaard. "Turkstra Profiles of North Sea Currents: Wider Than You’d Think." In ASME 2011 30th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2011. http://dx.doi.org/10.1115/omae2011-49866.

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To design marine structures in deep water, currents must be modelled accurately as a function of depth. These models often take the form of T-year profiles, which assume the T-year extreme current speed occurs simultaneously at each depth. To better reflect the spatial correlation in the current speeds versus depth, we have recently introduced Turkstra current profiles. These assign the T-year speed at one depth, and “associated” speeds expected to occur simultaneously at other depths. Two essentially decoupled steps are required: (1) marginal analysis to estimate T-year extremes, and (2) some
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Kodaira, Tsubasa, and Takuji Waseda. "ADCP Observation and Numerical Model Prediction of Tidal Currents Near Kozu Island." In ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/omae2018-78220.

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Izu island chain south of Tokyo, Japan has been considered as a prospective area for ocean renewable energy development because of relatively strong tidal currents, and the Kuroshio current. An Acoustic Doppler Current Profiler (ADCP) measurement near one of the islands, Kozu island, was conducted to know ocean current variability. The ADCP, Signature500, was installed 700m away from the coast and the water depth is 32m there. The observation period is for a month from January 8th, 2017. Vertical profile of the currents was recorded every 1 m at 1 minute interval. Based on the observation, the
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Sheikh, Rizwan, and Alison Brown. "Extreme Vertical Deepwater Current Profiles in the South China Sea, Offshore Borneo." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-21006.

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This paper details a study of extreme oceanographic currents at deepwater locations offshore Borneo in the South China Sea. With the global demand for oil and gas set to rise steadily over the long-term, oil and gas operators are ever more exploring deeper waters in search of reserves. Often, these finds are economically marginal and challenging from an engineering perspective. Offshore Borneo is a typical example of this, where one such challenge is the prediction of extreme current speeds. Indeed, currents in deepwater are more complex and less constant with depth. As a consequence, the vert
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Gansel, Lars, Østen Jensen, Per Christian Endresen, and Martin Føre. "Deformation of Nets With Bending Stiffness Normal to Uniform Currents." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10880.

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The tremendous growth of the fish farming industry in Norway over the past decades was supported by new designs and materials for fish farms, enabling bigger fish cages to be positioned in more exposed sea areas. Today, the nets of most fish cages in Norway are made from nylon. Nylon nets are lightweight, relatively easy to handle and at the low cost end of proposed net materials. However, nylon nets also have some unfortunate characteristics like low abrasion resistance and limited tensile strength. Thus, new net materials are proposed to better prevent escapes, protect fish from predator att
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Chen, Chen, and Masashi Kashiwagi. "Ship Routing Based on the Kuroshio Current." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61606.

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As a strong western-boundary current, the Kuroshio Current has significant effects on the ship navigation in the East China Sea (ECS). To quantitatively know more about its influence, we present simulations of the ocean current in the North Pacific Ocean using the well-known Princeton Ocean Model (POM). The high-resolution current distributions could be applied to conduct numerical simulations of the ship navigation, which utilized a ship maneuvering model known as the Mathematical Maneuvering Group (MMG). Calculation of a container ship as well as a training ship have been conducted. The simu
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Lamas, Francisco, Miguel A. M. Ramirez, and Antonio Carlos Fernandes. "Yaw Galloping of a TLWP Platform Under High Speed Currents by Analytical Methods and its Comparison With Experimental Results." In ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/omae2017-61909.

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Flow Induced Motions are always an important subject during both design and operational phases of an offshore platform life. These motions could significantly affect the performance of the platform, including its mooring and oil production systems. These kind of analyses are performed using basically two different approaches: experimental tests with reduced models and, more recently, with Computational Fluid Dynamics (CFD) dynamic analysis. The main objective of this work is to present a new approach, based on an analytical methodology using static CFD analyses to estimate the response on yaw
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Jeans, Gus, Liam Harrington-Missin, Andrew Watson, and Jon Upton. "The Use of Empirical Orthogonal Functions for Deriving Response Based Extreme Current Profiles." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83052.

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Coherent extreme current profiles are derived to reduce the over-conservatism associated with the traditional assumption that extreme currents occur at all depths through the water column simultaneously. Empirical Orthogonal Function (EOF) analysis has proven effective for derivation of coherent extreme current profiles in regions where it effectively captures the dominant characteristics of the flow regime. This is despite the questionable suitability of EOF for Current Profile Characterisation, which reduces a large current profile data set into a much smaller set of profiles for riser fatig
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Lundin, Staffan, Ma˚rten Grabbe, Katarina Yuen, and Mats Leijon. "A Design Study of Marine Current Turbine-Generator Combinations." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79350.

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Marine currents are an offshore source of renewable energy of increasing importance, with the development of technology for electricity generation from tidal currents or low-head river currents advancing at a quick pace. Two of the major components of a marine current power plant are the generator and the turbine. It is not sufficient to design these components separately, but a system approach, where the power plant is seen as one entity, must be taken to achieve best overall efficiency. In the present paper, the performance of three different combinations of direct-driven permanent magnet ge
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Gansel, L. C., Ø. Jensen, E. Lien, and P. C. Endresen. "Forces on Nets With Bending Stiffness: An Experimental Study on the Effects of Flow Speed and Angle of Attack." In ASME 2012 31st International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/omae2012-83435.

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This study investigates the effects of changes in flow speed and angle of attack on drag and lift forces on nets with bending stiffness. Today most fish cage nets are made from nylon, but new cage materials are proposed in order to improve the stability of cages in currents and waves, to reduce biofouling, prevent escapes, and to secure fish from predator attacks. The use of some of these materials leads to nets with bending stiffness in at least one direction. However, not much is known about the performance of such nets in currents and waves. In this study three different nets with bending s
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Yuen, Katarina, Karin Nilsson, Ma˚rten Grabbe, and Mats Leijon. "Experimental Setup: Low Speed Permanent Magnet Generator for Marine Current Power Conversion." In ASME 2007 26th International Conference on Offshore Mechanics and Arctic Engineering. ASMEDC, 2007. http://dx.doi.org/10.1115/omae2007-29251.

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Marine currents, e.g. tidal currents, ocean currents and unregulated water courses are characterized by a fairly steady or regular flow and pose a significant potential for electricity generation. An ongoing research project at Uppsala University is looking into an energy conversion system with a vertical axis turbine and a permanent magnet direct drive generator placed directly in the water flow, i.e. without using a dam. This choice of technology is intended to provide a simple and robust system with low maintenance needs and minimal environmental impact. During 2006 an experimental setup ha
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