Bibliografías temáticas / Ocean ventilation

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Literatura académica sobre el tema "Ocean ventilation"

Autor: Grafiati
Publicado: 14 de diciembre de 2024
Última modificación: 19 de julio de 2025

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Artículos de revistas sobre el tema "Ocean ventilation"

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Primeau, François W., and Mark Holzer. "The Ocean’s Memory of the Atmosphere: Residence-Time and Ventilation-Rate Distributions of Water Masses." Journal of Physical Oceanography 36, no. 7 (2006): 1439–56. http://dx.doi.org/10.1175/jpo2919.1.

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Abstract A conceptually new approach to diagnosing tracer-independent ventilation rates is developed. Tracer Green functions are exploited to partition ventilation rates according to the ventilated fluid’s residence time in the ocean interior and according to where this fluid enters and exits the interior. In the presence of mixing by mesoscale eddies, which are reasonably represented by diffusion, ventilation rates for overlapping entry and exit regions cannot meaningfully be characterized by a single rate. It is a physical consequence of diffusive transport that fluid elements that spend an
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Bopp, L., L. Resplandy, A. Untersee, P. Le Mezo, and M. Kageyama. "Ocean (de)oxygenation from the Last Glacial Maximum to the twenty-first century: insights from Earth System models." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 375, no. 2102 (2017): 20160323. http://dx.doi.org/10.1098/rsta.2016.0323.

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All Earth System models project a consistent decrease in the oxygen content of oceans for the coming decades because of ocean warming, reduced ventilation and increased stratification. But large uncertainties for these future projections of ocean deoxygenation remain for the subsurface tropical oceans where the major oxygen minimum zones are located. Here, we combine global warming projections, model-based estimates of natural short-term variability, as well as data and model estimates of the Last Glacial Maximum (LGM) ocean oxygenation to gain some insights into the major mechanisms of oxygen
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Naveira Garabato, Alberto C., Graeme A. MacGilchrist, Peter J. Brown, D. Gwyn Evans, Andrew J. S. Meijers, and Jan D. Zika. "High-latitude ocean ventilation and its role in Earth's climate transitions." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 375, no. 2102 (2017): 20160324. http://dx.doi.org/10.1098/rsta.2016.0324.

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The processes regulating ocean ventilation at high latitudes are re-examined based on a range of observations spanning all scales of ocean circulation, from the centimetre scales of turbulence to the basin scales of gyres. It is argued that high-latitude ocean ventilation is controlled by mechanisms that differ in fundamental ways from those that set the overturning circulation. This is contrary to the assumption of broad equivalence between the two that is commonly adopted in interpreting the role of the high-latitude oceans in Earth's climate transitions. Illustrations of how recognizing thi
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Katavouta, Anna, and Richard G. Williams. "Ocean carbon cycle feedbacks in CMIP6 models: contributions from different basins." Biogeosciences 18, no. 10 (2021): 3189–218. http://dx.doi.org/10.5194/bg-18-3189-2021.

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Abstract. The ocean response to carbon emissions involves the combined effect of an increase in atmospheric CO2, acting to enhance the ocean carbon storage, and climate change, acting to decrease the ocean carbon storage. This ocean response can be characterised in terms of a carbon–concentration feedback and a carbon–climate feedback. The contribution from different ocean basins to these feedbacks on centennial timescales is explored using diagnostics of ocean carbonate chemistry, physical ventilation and biological processes in 11 CMIP6 Earth system models. To gain mechanistic insight, the d
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Sallée, Jean-Baptiste, Kevin Speer, Steve Rintoul, and S. Wijffels. "Southern Ocean Thermocline Ventilation." Journal of Physical Oceanography 40, no. 3 (2010): 509–29. http://dx.doi.org/10.1175/2009jpo4291.1.

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Abstract An approximate mass (volume) budget in the surface layer of the Southern Ocean is used to investigate the intensity and regional variability of the ventilation process, discussed here in terms of subduction and upwelling. Ventilation resulting from Ekman pumping is estimated from satellite winds, the geostrophic mean component is assessed from a climatology strengthened with Argo data, and the eddy-induced advection is included via the parameterization of Gent and McWilliams, together with eddy mixing estimates. All three components contribute significantly to ventilation. Finally, th
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Thiele, G., and J. L. Sarmiento. "Tracer dating and ocean ventilation." Journal of Geophysical Research 95, no. C6 (1990): 9377. http://dx.doi.org/10.1029/jc095ic06p09377.

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Shepherd, John G., Peter G. Brewer, Andreas Oschlies, and Andrew J. Watson. "Ocean ventilation and deoxygenation in a warming world: introduction and overview." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 375, no. 2102 (2017): 20170240. http://dx.doi.org/10.1098/rsta.2017.0240.

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Changes of ocean ventilation rates and deoxygenation are two of the less obvious but important indirect impacts expected as a result of climate change on the oceans. They are expected to occur because of (i) the effects of increased stratification on ocean circulation and hence its ventilation, due to reduced upwelling, deep-water formation and turbulent mixing, (ii) reduced oxygenation through decreased oxygen solubility at higher surface temperature, and (iii) the effects of warming on biological production, respiration and remineralization. The potential socio-economic consequences of reduc
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Mecking, Sabine, and Kyla Drushka. "Linking northeastern North Pacific oxygen changes to upstream surface outcrop variations." Biogeosciences 21, no. 5 (2024): 1117–33. http://dx.doi.org/10.5194/bg-21-1117-2024.

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Abstract. Understanding the response of the ocean to global warming, including the renewal of ocean waters from the surface (ventilation), is important for future climate predictions. Oxygen distributions in the ocean thermocline have proven an effective way to infer changes in ventilation because physical processes (ventilation and circulation) that supply oxygen are thought to be primarily responsible for changes in interior oxygen concentrations. Here, the focus is on the North Pacific thermocline, where some of the world's oceans' largest oxygen variations have been observed. These variati
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Li, Lingwei, Zhengyu Liu, Jinbo Du, Lingfeng Wan, and Jiuyou Lu. "Mechanisms of global ocean ventilation age change during the last deglaciation." Climate of the Past 20, no. 5 (2024): 1161–75. http://dx.doi.org/10.5194/cp-20-1161-2024.

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Abstract. Marine radiocarbon (14C) is widely used to trace deep-ocean circulation, providing insight into the atmosphere–ocean exchange of CO2 during the last deglaciation. Evidence shows a significantly depleted Δ14C in the glacial deep ocean, suggesting an increased ventilation age at the Last Glacial Maximum (LGM). In this study, using two transient simulations with tracers of 14C and ideal age (IAGE), we found that the oldest ventilation age is not observed at the LGM. In contrast, the models show a modestly younger ventilation age during the LGM compared to the present day. The global mea
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Tschumi, T., F. Joos, M. Gehlen, and C. Heinze. "Deep ocean ventilation, carbon isotopes, marine sedimentation and the deglacial CO<sub>2</sub> rise." Climate of the Past 7, no. 3 (2011): 771–800. http://dx.doi.org/10.5194/cp-7-771-2011.

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Abstract. The link between the atmospheric CO2 level and the ventilation state of the deep ocean is an important building block of the key hypotheses put forth to explain glacial-interglacial CO2 fluctuations. In this study, we systematically examine the sensitivity of atmospheric CO2 and its carbon isotope composition to changes in deep ocean ventilation, the ocean carbon pumps, and sediment formation in a global 3-D ocean-sediment carbon cycle model. Our results provide support for the hypothesis that a break up of Southern Ocean stratification and invigorated deep ocean ventilation were the
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Tesis sobre el tema "Ocean ventilation"

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MacGilchrist, Graeme. "Lagrangian perspectives on ocean ventilation." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:de6c14b7-a55c-44e7-8c2b-2f94a601ab8e.

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Within the global climate system, the ocean operates as a vast store of important components such as heat and carbon dioxide that it exchanges with the atmosphere on timescales from days to millennia. Its facility to do so is in large part due to the process of ocean ventilation by which water is moved from the surface mixed layer, where it is in contact with the atmosphere, and transported through the subsurface. An understanding of ocean ventilation, therefore, is crucial in establishing the magnitudes and timescales of ocean-atmosphere exchange. In this thesis, a predominantly Lagrangian ap
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Millet, Bruno. "Tracer and model constraints on the ventilation of the deep Pacific Ocean." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPASJ019.

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L'océan Pacifique représente environ 50% du volume global des océans, ce qui en fait un acteur essentiel des cycles biogéochimiques globaux et de leur réponse aux perturbations. En particulier, l'océan Pacifique profond abrite des réservoirs majeurs de carbone et de nutriments, dont la taille et les variations sont largement contrôlées par les transports physiques de traceurs. Dans cette thèse, nous visons à mieux comprendre et contraindre le transport de traceurs dans l'océan Pacifique profond à travers les états climatiques. Pour cela, nous générons de nouvelles et utilisons d'anciennes obse
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Zhao, Ning Ph D. Massachusetts Institute of Technology. "Reconstructing deglacial ocean ventilation using radiocarbon : data and inverse modeling." Thesis, Massachusetts Institute of Technology, 2017. http://hdl.handle.net/1721.1/108960.

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Thesis: Ph. D., Joint Program in Oceanography/Applied Ocean Science and Engineering (Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences; and the Woods Hole Oceanographic Institution), 2017.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 137-149).<br>Significant changes occurred during the last deglaciation (roughly 10-20 thousand years (ka) before present) throughout the climate system. The ocean is a large reservoir of carbon and heat, however, its role during the deglaciation is still not well understood. In
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Stöven, Tim [Verfasser]. "Ocean ventilation and anthropogenic carbon based on evaluated transient tracer applications / Tim Stöven." Kiel : Universitätsbibliothek Kiel, 2015. http://d-nb.info/107440470X/34.

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Chandana, K. R., Ravi Bhushan, and A. J. T. Jull. "Evidence of Poor Bottom Water Ventilation during LGM in the Equatorial Indian Ocean." FRONTIERS MEDIA SA, 2017. http://hdl.handle.net/10150/626606.

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Multi-proxy approach for the reconstruction of paleo-redox conditions is attempted on a radiocarbon (C-14) dated sediment core near the equatorial Indian Ocean. Based on the behavior and distribution of redox sensitive and productivity proxies, study demonstrates prevalence of anoxic bottom water conditions during LGM due to poorly ventilated bottom waters augmented by high surface productivity resulting in better preservation of organic carbon (OC). During early Holocene, the equatorial Indian Ocean witnessed high sedimentation rates resulting in high organic carbon (OC) with depleted redox s
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Radwan, Jean. "Contribution à la mise au point d'une technique de mesure du Kr85 dans l'océan : étude et réalisation d'un système d'extraction, de séparation et de mesure du Krypton total dissous." Paris 6, 1986. http://www.theses.fr/1986PA066529.

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Le Kr85 est un isotope radioactif produit par l'industrie nucléaire. Sa qualité de gaz rare, sa période de 10. 76 ans, son histoire atmosphérique bien documentée et sa fonction d'entrée dans l'océan raisonnablement connue en font un traceur océanographique intéressant pour l'étude de la dynamique océanique à des échelles de temps de quelques années à quelques décennies (formation des eaux profondes, ventilation de la thermocline). Du fait de la faible activité spécifique du Kr85 (quelques dpm/m3 d'eau) la mesure de cet isotope exige des moyens de prélèvement lourds (200 l d'eau par échantillon
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Neale, James Richard Mechanical &amp Manufacturing Engineering Faculty of Engineering UNSW. "Experimental and numerical investigation of noise generation from the expansion of high velocity HVAC flows on board ocean going fast ferries." Awarded by:University of New South Wales. School of Mechanical and Manufacturing Engineering, 2006. http://handle.unsw.edu.au/1959.4/28371.

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This thesis details a study of strategies used to limit the flow generated noise encountered in the outlet diffusers of high velocity heating, ventilation and air conditioning (HVAC) duct systems. The underlying noise rating criterion is drawn from the specifications covering ocean going aluminium fast ferries. Although directed primarily towards the fast ferry industry the results presented herein are applicable to other niche high velocity HVAC applications. Experimental tests have been conducted to prove the viability of a high velocity HVAC duct system in meeting airflow requirements whils
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Vergara, Oscar. "Ventilation de la circulation océanique dans le Pacifique sud-est par les ondes de Rossby et l'activité méso-échelle : téléconnexions d'ENSO." Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30356/document.

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L'objectif principal de cette thèse est l'étude de la connexion entre la variabilité dans l'océan Pacifique équatorial et la circulation de subsurface le long des côtes du Pérou et du Chili, à des échelles de temps interannuelles à décennales. Les diagnostiques menés dans ce travail se basent sur un modèle régional océanique. L'accent est mis sur l'interprétation de la propagation verticale de la variabilité dans les couches intermédiaires de l'océan, où l'on trouve une intense zone de minimum d'oxygène (OMZ ; de l'anglais Oxygen Minimum Zone), et la relation de cette propagation verticale ave
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Akhoudas, Camille. "Un nouveau regard sur la dynamique de l’océan Austral et ses interactions avec la cryosphère révélé par une approche isotopique." Electronic Thesis or Diss., Sorbonne université, 2020. http://www.theses.fr/2020SORUS464.

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L’océan Austral est un acteur central de la circulation océanique mondiale et du système climatique terrestre. Malgré l’essor des observations in situ dans cette région reculée du globe depuis les années 1990 (avec notamment le début de « l’ère satellitaire » et des grands programmes internationaux d’observations tel que WOCE, CLIVAR, GO-SHIP, ou ARGO), ce vaste océan reste encore aujourd’hui largement méconnu. Il est pourtant nécessaire de parvenir à mieux observer et comprendre les mécanismes de sa dynamique océanique ainsi que sa variabilité afin de prédire au mieux l’évolution future du sy
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Andrié, Chantal. "Utilisation des traceurs helium-3 et tritium en oceanographie." Paris 6, 1987. http://www.theses.fr/1987PA066241.

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Le traceur transitoire que constitue le tritium est devenu l'un des outils les plus prometteurs dens l'etude de la circulation oceanique generale et de la capacite de l'ocean a absorber le gaz carbonique anthropogene. L'utilisation simultanee du tritium et de son descendant par voie radioactive l'helium-3 ajoute une information supplementaire: la paire de traceurs tritium et helium-3 constitue une horloge dans l'etude des masses d'eau. En plus de son origine "tritiumgenique", l'helium-3 est emis au niveau des dorsales oceaniques et il constitue un traceur de choix dans l'etude de la circulatio
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Libros sobre el tema "Ocean ventilation"

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Ronski, Stephanie. Ventilation der Grönlandsee: Variabilität und ihre Ursachen 1994-2001 = Ventilation of the Greenland Sea : variability and its causes in 1994-2001. Alfred-Wegener-Institut für Polar- und Meeresforschung, 2003.

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Doney, Scott Christopher. A study of North Atlantic ventilation using transient tracers. Woods Hole Oceanographic Institution, 1991.

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Madeja-Strumińska, Barbara. Ocena przewietrzania kopalń głębinowych. Oficyna Wydawnicza Politechniki Wrocławskiej, 2000.

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Capítulos de libros sobre el tema "Ocean ventilation"

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Wang, Pao K. "Ventilation Effect of Falling Ice Hydrometeors." In Atmosphere, Earth, Ocean & Space. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-33-4431-0_5.

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Olsen, Alexander, and Pamela Rossi Ciampolini. "Ventilation System Related and Installation Criteria Requirements." In Synthesis Lectures on Ocean Systems Engineering. Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-56245-7_4.

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Banse, Karl, and James R. Postel. "Wintertime convection and ventilation of the upper pycnocline in the northernmost Arabian Sea." In Indian Ocean Biogeochemical Processes and Ecological Variability. American Geophysical Union, 2009. http://dx.doi.org/10.1029/2008gm000704.

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Woods, J. D. "Chapter 34 The physics of Thermocline Ventilation." In Coupled Ocean-Atmosphere Models. Elsevier, 1985. http://dx.doi.org/10.1016/s0422-9894(08)70730-x.

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Paull, C. K., P. D. Fullagar, T. J. Bralower, and U. Rohl. "Seawater Ventilation of Mid-Pacific Guyots Drilled during Leg 143." In Proceedings of the Ocean Drilling Program, 143 Scientific Results. Ocean Drilling Program, 1995. http://dx.doi.org/10.2973/odp.proc.sr.143.222.1995.

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Ergin, S. "Flow Characteristics of air-caps for tank ventilation in ships." In Maritime Transportation and Exploitation of Ocean and Coastal Resources. Taylor & Francis, 2006. http://dx.doi.org/10.1201/9781439833728.ch75.

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Rohling, Eelco, and Ramadan Abu-Zied. "The Marine Environment: Present and Past." In The Physical Geography of the Mediterranean. Oxford University Press, 2009. http://dx.doi.org/10.1093/oso/9780199268030.003.0012.

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The Mediterranean is a landlocked, semi-enclosed marginal sea that spans a maximum of 3,860 km in the west–east direction, and a maximum of ∼1, 600km in the north–south direction. Along its roughly 46,000 km of coastline, the basin is enclosed by mountainous terrain, except for a part of the North African margin to the east of Tunisia. The Mediterranean Sea contains very deep basins, more than 4 km, and has an average depth of approximately 1,500 m. Its only natural connection with the open (Atlantic) ocean is through the narrow Strait of Gibraltar, which contains a 284-m deep sill (at a width of ∼30 km), and reaches a minimum width of only 14 km (at a depth of 880 m) (Bryden and Kinder 1991). The Strait of Sicily subdivides the Mediterranean Sea into a western and an eastern basin. This strait is relatively wide (about 130 km) and contains a topographically complex sill-structure with an estimated average depth of 330 m (Wust 1961), reaching 365 and 430 m in the two major channels (Garzoli and Maillard 1979). The eastern Mediterranean contains two smaller marginal basins, namely the Adriatic Sea and the Aegean Sea. Watermasses are exchanged through both the Strait of Gibraltar and the Strait of Sicily by eastward surface and westward subsurface flows. This pattern of exchange results from a net buoyancy loss in the basins on the easterly side of the sills, primarily due to strong net evaporative loss from the Mediterranean, and secondarily to some net cooling. Deep water ventilation in the Mediterranean is primarily salt-driven, and secondarily temperature-driven. This is similar to the mode observed in the present-day Red Sea, but contrasts with the temperature-dominated mode in the modern world ocean. As such, the Mediterranean deep ventilation might be more appropriately described as halo-thermal rather than with the common term thermo-haline. This offers a useful analogue for world ocean circulation modes in past times with very warm and relatively equable global climates, such as the Mesozoic. Interestingly, the Mediterranean is characterized by periodic, widespread deposition of organic-rich sediments or ‘sapropels’ over periods of several thousands of years, similar (in miniature) to the deposition of ‘black shales’ in the Mesozoic oceans.
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Lauga, Eric. "8. Researching fluids and flows." In Fluid Mechanics: A Very Short Introduction. Oxford University Press, 2022. http://dx.doi.org/10.1093/actrade/9780198831006.003.0008.

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‘Researching fluids and flows’ summarizes current research in fluid mechanics by starting with environmental flows, motivated by climate change, and the active fluid dynamics of our changing environment. Examples include atmospheric flows, ocean transport, ice dynamics, flow of rivers and lakes, and the role of stratification. The fluid mechanics of energy is motivated by the desire to build a greener world. Examples include wind farms, natural ventilation, biofuels, pollution transport, and remediation. Complex fluids and materials, including non-Newtonian fluids, can behave as a combination of both fluids and solids. Examples include cosmetic products, granular materials, suspensions, and liquid crystals. It is worth looking at flows on small scales, where a new fundamental understanding of flows at the limit of the continuum scale is now possible. Flows are relevant to the biological world. Examples include locomotion, vascular plants, blood flow, and the fluid dynamics of disease transmission. there are two fundamental mysteries at the heart of fluid mechanics: the nature of turbulence and the mathematical structure of the equations for fluid flows (Navier–Stokes equations).
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Waite, Lowell E., Richard B. Koepnick, and James R. Markello. "The Miocene World: A Brief Summary." In Cenozoic Isolated Carbonate Platforms—Focus Southeast Asia. SEPM (Society for Sedimentary Geology), 2023. http://dx.doi.org/10.2110/sepmsp.114.03.

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This paper presents a brief synopsis of the Miocene Epoch, an important transitory chapter in the history of the Earth. It was during the Miocene that the major continents and oceans attained a “modern” configuration in terms of paleogeography and tectonics, oceanic ventilation and circulation, ocean chemistry, and faunal and floral assemblages. It also was during the Miocene that global climate fully transitioned into its current icehouse state, including marked growth of the Antarctic ice sheet and initiation of the Arctic ice cap. Long-term global cooling was controlled by a number of factors including tectonics, the large-scale changes in the distribution of flora, particularly the expansion of grasslands, and by fluctuating orbital parameters of the Earth. This global cooling trend was briefly interrupted by a short period of warming in the middle Miocene. Miocene sea-level changes consisted of a number of glacio-eustatic third-order (1–5 million year [m.y.] duration) cycles superposed upon three longer-term, second-order (5–20 m.y. duration) supercycles. Development of large-scale tropical carbonate systems in the Miocene was relegated to three main geographic regions: the circum-Caribbean, Mediterranean, and Indo-Pacific. In addition, a pronounced cool-water platform system developed along the southern margin of Australia. Miocene reefal buildups were dominated by tropical to subtropical framework assemblages consisting primarily of large scleractinian corals, encrusting red algae, and rhodoliths (free-living coralline red algae) that grew on platform margins and interiors or on isolated atolls. Miocene carbonates were deposited in a variety of oceanic and structural settings and constitute important petroleum reservoirs, particularly in Southeast Asia. Deep-water terrigenous clastic sediments of Miocene age are also important petroleum reservoirs in some regions. In addition, the Miocene interval contains numerous prolific petroleum source rocks, most composed of Type III (gas-prone) kerogen.
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Actas de conferencias sobre el tema "Ocean ventilation"

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Simkins, David. "Air Balancing Is More than a Building Science." In SSPC 2014 Greencoat. SSPC, 2014. https://doi.org/10.5006/s2014-00054.

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Since the World War II era, desiccant dehumidification technology has been utilized to protect technical equipment and ocean going cargo from the negative effects of corrosion. In fact, the use of desiccant dehumidifiers has been the backbone of the structural remediation industry in the wake of devastating hurricanes and floods for nearly half a century. In the early 80s, this technology was introduced to the coatings industry as a method to help control flash rusting, enabling the applicator to provide a superior finish even in the harshest environments. This new process provided a solution
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Talley, Lynne D., Rana Fine, Rick Lumpkin, Nikolai Maximenko, and Rosemary Morrow. "Surface Ventilation and Circulation." In OceanObs'09: Sustained Ocean Observations and Information for Society. European Space Agency, 2010. http://dx.doi.org/10.5270/oceanobs09.pp.38.

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Hagesteijn, G., and J. Brouwer. "Experimental Investigation of the Effect of Waves, Ventilation and Cavitation in Bollard Pull Conditions." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10814.

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Ventilation is a feared working condition of ship propulsors, especially in Dynamic Positioning operation, since it leads to the lost of thrust of the propeller resulting into an uncontrollable ship. Experience showed that the risk of ventilating propellers was negligently underestimated in traditional towing tank experiments but better predicted in depressurised towing tanks, where the ambient pressure is scaled down according to Froude similarity. In 2012 MARIN’s Depressurized Wave Basin (DWB) has taken into service. This unique facility is the only one in the world that is able to generate
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Mak, Lawrence, Andrew Kuczora, Brian Farnworth, Rob Brown, and Michel B. DuCharme. "Thermal Protection and Microclimate of SOLAS Approved Lifeboats." In ASME 2010 29th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/omae2010-20500.

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Lifeboats are used as an evacuation system on a wide variety of offshore structures and marine vehicles. Currently, International Maritime Organization (IMO) Lifesaving Appliances (LSA) Code does not specify thermal protection and ventilation criteria for lifeboats. A test program was conducted to assess the system thermal protection and microclimate of SOLAS approved lifeboats for the Arctic environment. Some of the research findings of the first phase experiments are reported in this paper. In conducting experiments with a 72-person SOLAS approved lifeboat, the study found that the lifeboat
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Gray-Stephens, Angus, Tahsin Tezdogan, and Sandy Day. "Strategies to Minimise Numerical Ventilation in CFD Simulations of High-Speed Planing Hulls." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95784.

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Abstract Numerical Ventilation (NV) is a well-known problem that occurs when the Volume of Fluid method is used to model vessels with a bow that creates a small, acute entrance angle with the free surface. These are typical of both planing hulls and yachts. There is a general lack of discussion focusing upon Numerical Ventilation available within the public domain, which is attributable to the fact that it only affects such a niche area of naval architecture. The information available is difficult to find, often fleetingly mentioned in papers with a different focus. Numerical Ventilation may b
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Li, Z. P., L. Q. Sun, X. L. Yao, and Y. Piao. "Three-Dimensional Numerical Analysis of Horizontal and Vertical Coalescence of Bubbles at Two Submerged Horizontal Orifices on the Wall." In ASME 2019 38th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/omae2019-95850.

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Abstract In the process of bubbling from two submerged adjacent orifices, bubbles coalescence becomes inevitable. But the study of the evolution and interaction of bubbles from submerged orifices is little, especially numerical simulation. In this paper, combined with mesh smoothing technique, mesh subdivision technique and the technique of axisymmetric coalescence and 3D coalescence, a three-dimensional model of bubbles coalescence at two submerged adjacent orifices on the wall is established by the boundary element method. Then, numerical simulations were carried out for horizontal and verti
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Hagesteijn, Gerco, Karola van der Meij, and Cornel Thill. "Distributed Propulsion: A Novel Concept for Inland Vessels." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41845.

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In the drive to reduce the fuel consumption of inland vessels, one of the main limitations, the risk of propeller ventilation was investigated. The aim was to reduce the resistance of the vessel, while at the same time an acceptable margin against propeller ventilation had to be assured. A typical inland vessel has up to two high loaded relative large propellers, with tip regions in the lighter loading condition above the water line. To eliminate the risk of propeller ventilation, these ships often have inbuilt shape features such as tunnels and skirts, only having the intention to avoid air b
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Kim, Jeong Hwan, Soung Woo Park, and Jung Kwan Seo. "An Experimental Study on the Diffusion Characteristics of Hydrogen by Ventilation System." In ASME 2024 43rd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2024. http://dx.doi.org/10.1115/omae2024-123243.

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Abstract Hydrogen gas exhibits a broader flammable limit concentration range in comparison to hydrocarbon gas, possesses lower ignition energy and ignition temperature, and manifests a heightened propagation speed of explosive flames. In the eventuality of a hydrogen gas leak, it is noteworthy that the density of hydrogen is lower than that of air, leading to its dispersion into the surrounding atmosphere within an open space. Nevertheless, within a confined environment, the hydrogen gas cloud has the potential to stagnate and accumulate. The presence of an accumulated hydrogen gas cloud eleva
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Huang, Huai-Hsuan, Curtis Deutsch, and Thomas Cronin. "OSTRACOD BODY SIZE VARIABILITY LINKED TO ARCTIC OCEAN VENTILATION DURING QUATERNARY CLIMATE CHANGES." In GSA Connects 2023 Meeting in Pittsburgh, Pennsylvania. Geological Society of America, 2023. http://dx.doi.org/10.1130/abs/2023am-395056.

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Tregde, Vidar. "Compressible Air Effects in CFD Simulations of Free Fall Lifeboat Drop." In ASME 2015 34th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/omae2015-41049.

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A free fall lifeboat is typically dropped from heights between 30 and 40m, but during full scale testing, drop heights have been exceeding 60 m. During a drop, the free fall lifeboat is going through several phases; sliding on the skid, rotation on skid, free fall, water entry, ventilation, maximum submergence, resurfacing and the sailing phase. During impact and submergence the lifeboat will go through a ventilation phase. In this phase the lifeboat creates an air cavity behind the pilot house and a larger one behind the stern. The air cavity formed on top of canopy, aft of the pilot house is
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Informes sobre el tema "Ocean ventilation"

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Nadiga, Balasubramanya T., and Nathan Mark Urban. A simple model of the effect of ocean ventilation on ocean heat uptake. Office of Scientific and Technical Information (OSTI), 2018. http://dx.doi.org/10.2172/1418778.

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