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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Heat -- Transmission. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (209 pages)
    Edition: 1st ed.
    ISBN: 9780123965103
    Series Statement: Issn Series
    DDC: 621.4022
    Language: English
    Note: Front Cover -- Advances in Heat Transfer -- Copyright -- Contents -- Contributors -- Preface -- Chapter One - Prediction of the Influence of Energetic Chemical Reactions on Forced Convective Heat Transfer -- 1. INTRODUCTION -- 2. PRIOR WORK -- 3. A MODEL FOR NEW NUMERICAL SOLUTIONS -- 4. CLOSED-FORM ANALYSES -- 5. NEW NUMERICAL SOLUTIONS -- 6. CONCLUSIONS -- 7. APOLOGY -- ACKNOWLEDGMENT -- REFERENCES -- Chapter Two - Advances and Outlooks of Heat Transfer Enhancement by Longitudinal Vortex Generators -- Abstract -- Nomenclature -- 1. INTRODUCTION -- 2. CHARACTERISTICS OF HEAT TRANSFER ENHANCEMENT BY LVGS -- 3. APPLICATIONS OF LVGS FOR HEAT TRANSFER ENHANCEMENT -- 4. CONCLUSIONS AND OUTLOOKS -- ACKNOWLEDGMENTS -- REFERENCES -- SUBJECT INDEX -- AUTHOR INDEX.
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  • 2
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Heat -- Transmission. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (360 pages)
    Edition: 1st ed.
    ISBN: 9780124079328
    Series Statement: Issn Series
    DDC: 621.4022
    Language: English
    Note: Front Cover -- Advances in Heat Transfer -- Copyright -- Contents -- Contributors -- Preface -- Chapter One: Trends, Tricks, and Try-ons in CFD/CHT -- 1. Introduction -- 2. Trends -- 2.1. Computational grid trends -- 2.1.1. Early choices: Cartesian, cylindrical-polar, and body-fitted -- 2.1.2. Arbitrary polygonal cells -- 2.1.3. PARSOL: for ``partly solid´´ cells -- 2.1.4. Space-averaged rather than detailed-geometry CFD -- 2.1.5. IBM: the immersed boundary method -- 2.1.6. Divided Cartesian grids -- 2.1.7. The future -- 2.2. Linear equation solver trends -- 2.2.1. Point-by-point (i.e., PBP) relaxation methods -- 2.2.2. General remarks about linear-equation solvers -- 2.2.3. The Thomas (or tridiagonal matrix) algorithm (i.e., TDMA) -- 2.2.4. Acceleration by overrelaxation -- 2.2.5. Conjugate gradient solvers -- 2.2.6. Preconditioned conjugate gradient solvers -- 2.3. Turbulence model trends -- 2.3.1. Origins -- 2.3.2. The effective-viscosity hypothesis -- 2.3.2.1. Early days -- 2.3.2.2. The mixing length hypothesis -- 2.3.2.3. Two-equation turbulence models -- 2.3.2.4. Wall functions -- 2.3.3. Reynolds stress models -- 2.3.4. DNS -- 2.3.5. Large eddy simulation -- 2.3.6. Population-based models -- 2.3.6.1. The main idea -- 2.3.6.2. Graphic representations -- 2.3.6.3. The ``TriMix´´ diagram, a ``map´´ of fuel-air-combustion product states -- 2.3.6.4. The combustor-simulation problem -- 2.3.6.5. When the turbulent fluctuations are ignored -- 2.3.6.6. EBU: the first two-member population model -- 2.3.6.7. A two-member model with Navier-Stokes equations for each member -- 2.3.6.8. A four-member population model -- 2.3.6.9. The multimember population -- 2.3.6.10. Populational and conventional CFD compared -- 3. Tricks -- 3.1. The IMMERSOL radiation model -- 3.1.1. The magnitude of the radiative problem -- 3.1.2. The action-at-a-distance difficulty. , 3.1.3. IMMERSOL: the main features -- 3.1.3.1. The dependent variables -- 3.1.3.2. The differential equations -- 3.1.3.3. The source terms -- 3.1.3.4. The value ascribed to λ3 -- 3.1.3.5. The boundary conditions -- 3.1.4. IMMERSOL: the rationale -- 3.1.4.1. Starting points -- 3.1.4.2. First steps -- 3.1.4.3. Between the ``thick´´ and ``thin´´ extremes -- 3.1.4.4. Wall emissivity as an extra resistance -- 3.1.5. IMMERSOL: conclusions -- 3.2. The wall-distance trick -- 3.2.1. How to calculate Wgap -- 3.2.2. The L equation -- 3.2.3. The parallel-wall situation -- 3.2.4. Concluding remark -- 3.3. The cut-link trick -- 3.3.1. Introduction -- 3.3.2. The pros and cons of PARSOL -- 3.3.3. Detecting the link intersections -- 3.3.3.1. The problem -- 3.3.3.2. The 2D projection method (2DPM) -- 3.3.3.3. The 2D section method (2DSM) -- 3.3.3.4. Other aspects of facet-grid-line intersection detection -- 3.3.4. Changing coefficients in SPARSOL -- 3.3.4.1. The problem -- 3.3.4.2. Changing the distances -- 3.3.4.3. Changing the areas -- 3.3.4.4. Adding fluid-side resistances -- 3.3.5. Modifying sources -- 3.3.6. Concluding remarks about SPARSOL -- 4. Try-ons -- 4.1. A differential equation for mixing length -- 4.1.1. What ludwig prandtl might have done -- 4.1.2. The spalart-allmaras viscosity-transport model -- 4.1.3. The ``mixing length transport try-on´´ -- 4.1.4. How ``const1´´ might be determined: the ``reverse-engineering´´ approach -- 4.1.5. Concluding remarks about mixing length transport -- 4.2. The population approach to swirling flow -- 4.2.1. The problem -- 4.2.2. A ``try-on´´ solution -- 4.3. Hybrid CFD ``Try-on´´ -- 4.3.1. The general idea -- 4.3.2. The partially parabolic method extended -- 4.3.3. Simulating automobile aerodynamics -- 4.3.4. Environmental applications -- 4.3.5. Generalizing wall functions -- 5. Concluding Remarks -- References. , Chapter Two: A Study of Micro-scale Boiling by Infrared Techniques -- 1. Introduction -- 1.1. Capability of infrared thermography heat transfer measurements -- 1.2. Methodology of IR measurement in microsystems -- 1.3. Microscale phenomenon of boiling -- 1.3.1. Pool boiling -- 1.3.2. Boiling in micro-channels -- 2. Boiling Incipience -- 2.1. Models for prediction of incipient boiling heat flux and wall superheat -- 2.2. Comparison between models and experiments -- 2.2.1. Wall superheat -- 2.2.2. The Influence of Surface Roughness on Boiling Incipience -- 2.2.3. Effect of Inlet Velocity on Incipient Boiling Heat Flux -- 3. Boiling Heat Transfer in Micro-channels -- 3.1. Heat transfer coefficient -- 3.2. Flow instabilities -- 3.2.1. Fluctuation of pressure drop, fluid, and heated wall temperatures -- 4. Nucleation Characteristics of Heaters -- 4.1. Nucleation site density (NSD) -- 4.2. Dryout -- 4.2.1. Flat surface with nano-scale roughness -- 4.2.2. Channel surface with micro-scale roughness -- 4.2.3. Explosive boiling -- 5. The Boiling Crisis Phenomenon -- 5.1. CHF measurements in micro-channels -- 5.2. Physical approach based on IR measurements -- 5.2.1. Period between successive events -- 5.2.2. The initial thickness of the liquid film -- 6. Effect of Surface Active Agents (Surfactants) on Boiling Characteristics -- 6.1. Properties of surfactants -- 6.2. Pool boiling heat transfer -- 6.2.1. Physical properties of solutions -- 6.2.2. Instrumentation -- 6.2.3. Visualization of thermal pattern on the heated wall -- 6.2.4. Boiling curves and heat transfer coefficients -- 6.2.5. The Effect of Physical Properties of Surfactant Solution on Heat Transfer -- 6.3. Boiling in confined narrow space -- 6.3.1. Boiling Curves and Average Heat Transfer -- 6.4. ONB in parallel micro-channels. , 6.4.1. Effect of dissolved gases on ONB during flow boiling of water and surfactant solutions in micro-channels -- 6.4.2. Boiling incipience in degraded surfactant solutions -- 7. Experimental Study of Integrated Micro-channel Cooling for 3D Electronic Circuit Architectures -- 8. Uncertainty -- 9. Conclusions -- References -- Chapter Three: Technology Evolution, from the Constructal Law -- 1. Technology Evolution, Predicted -- 2. Evolution of Compactness -- 3. Tree-Shaped Designs: Conduction, Fluid Flow, and Convection -- 4. Free Convection: An Engine+Brake System -- 5. Constructal Law, Design in Nature, and Complexity -- References -- Chapter Four: Recent Advances in Vapor Chamber Transport Characterization for High-Heat-Flux Applications -- 1. Introduction -- 1.1. Ultrathin vapor chambers for thermal management of electronics -- 1.2. Nucleate boiling in porous wick structures -- 1.3. Recent advances -- 2. Experimental Evaluation of Capillary-Fed Evaporation and Boiling -- 2.1. Homogeneous wick structures: morphological, pore size, porosity, and thickness effects -- 2.1.1. Sintered screen mesh -- 2.1.2. Monoporous sintered powder -- 2.1.3. Biporous sintered powder -- 2.1.4. Summary -- 2.2. Efficient liquid feeding and vapor extraction features -- 2.3. Prediction of capillary-fed boiling thermal resistance -- 2.4. Incipience of boiling under capillary-fed conditions -- 2.5. Dryout mechanisms and heater size dependency -- 3. Device-Level Modeling, Testing, and Design for High-Heat-Flux Applications -- 3.1. Flat heat pipe and vapor chamber models -- 3.1.1. Analytical modeling approaches -- 3.1.2. Numerical modeling approaches -- 3.1.3. Summary -- 3.2. Wick thermophysical properties and pore-scale evaporation characteristics -- 3.2.1. Simplified analytical prediction -- 3.2.2. Empirical characterization -- 3.2.3. Advances in characterization methods. , 3.3. Recent advances in ultrathin vapor chamber modeling -- 3.3.1. Wick microstructure effects on evaporation characteristics -- 3.3.2. Boiling in the wick structure -- 3.4. Design and development of ultrathin vapor chamber devices -- 3.4.1. Radio-frequency TGP -- 3.4.2. Micro-/nanostructured TGP -- 3.4.3. Planar vapor chambers with hybrid evaporator wicks -- 3.4.4. Polymer-based flat heat pipe -- 3.4.5. Silicon TGP vapor chamber -- 3.4.6. Titanium TGP -- 4. Nanostructured Capillary Wicks for Vapor Chamber Applications -- 4.1. Assessment and design of nanostructured wicks -- 4.1.1. Nanowire array wicks -- 4.1.2. Nanostructured coatings -- 4.2. Experimental evaluation of nanostructured wicks -- 4.2.1. Nanowire array wicks -- 4.2.2. Nanostructured coatings -- 5. Closure -- Acknowledgments -- References -- Chapter Five: Applications of Nanomaterials in Solar Energy and Desalination Sectors -- 1. Introduction -- 2. Solar Energy -- 2.1. Thermal energy storage systems -- 2.2. Direct absorption solar collectors -- 2.3. Photovoltaic technology -- 2.4. Desalination -- 3. Conclusions -- References -- Author Index -- Subject Index.
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  • 3
    Publication Date: 2021-05-12
    Description: The long-term warming of the ocean is a critical indicator of both the past and present state of the climate system. It also provides insights about the changes to come, owing to the persistence of both decadal variations and secular trends, which the ocean records extremely well (Hansen et al., 2011; IPCC, 2013; Rhein et al., 2013; Trenberth et al., 2016; Abram et al., 2019). It is well established that the emission of greenhouse gasses by human activities is mainly responsible for global warming since the industrial revolution (IPCC, 2013; Abram et al., 2019). The increased concentration of heat-trapping greenhouse gases in the atmosphere has interfered with natural energy flows. Currently there is an energy imbalance in the Earth’s climate system of almost 1 W m−2 (Trenberth et al., 2014; von Schuckmann et al., 2016, 2020a; Wijffels et al., 2016; Johnson et al., 2018; Cheng et al., 2019a; von Schuckmann et al., 2020a). Over 90% of this excess heat is absorbed by the oceans, leading to an increase of ocean heat content (OHC) and sea level rise, mainly through thermal expansion and melting of ice over land. These processes provide a useful means to quantify climate change. The first global OHC time series by Levitus et al. (2000) identified a robust long-term 0−3000 m ocean warming from 1948−98. Since then, many other analyses of global and regional OHC data have been performed. Here, we provide the first analysis of recent ocean heating, incorporating 2020 measurements through 2020 into our analysis.
    Description: Published
    Description: 523–530
    Description: 4A. Oceanografia e clima
    Description: JCR Journal
    Keywords: ocean temperature ; climate change ; climate change
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 4
    Publication Date: 2022-03-16
    Description: The increased concentration of greenhouse gases in the atmosphere from human activities traps heat within the climate system and increases ocean heat content (OHC). Here, we provide the first analysis of recent OHC changes through 2021 from two international groups. The world ocean, in 2021, was the hottest ever recorded by humans, and the 2021 annual OHC value is even higher than last year’s record value by 14 ± 11 ZJ (1 zetta J = 1021 J) using the IAP/CAS dataset and by 16 ± 10 ZJ using NCEI/NOAA dataset. The long-term ocean warming is larger in the Atlantic and Southern Oceans than in other regions and is mainly attributed, via climate model simulations, to an increase in anthropogenic greenhouse gas concentrations. The year-to-year variation of OHC is primarily tied to the El Niño-Southern Oscillation (ENSO). In the seven maritime domains of the Indian, Tropical Atlantic, North Atlantic, Northwest Pacific, North Pacific, Southern oceans, and the Mediterranean Sea, robust warming is observed but with distinct inter-annual to decadal variability. Four out of seven domains showed record-high heat content in 2021. The anomalous global and regional ocean warming established in this study should be incorporated into climate risk assessments, adaptation, and mitigation.
    Description: Published
    Description: 373–385
    Description: 4A. Oceanografia e clima
    Description: JCR Journal
    Keywords: ocean warming
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 5
    Publication Date: 2022-10-26
    Description: © The Author(s), 2019. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Meyssignac, B., Boyer, T., Zhao, Z., Hakuba, M. Z., Landerer, F. W., Stammer, D., Koehl, A., Kato, S., L'Ecuyer, T., Ablain, M., Abraham, J. P., Blazquez, A., Cazenave, A., Church, J. A., Cowley, R., Cheng, L., Domingues, C. M., Giglio, D., Gouretski, V., Ishii, M., Johnson, G. C., Killick, R. E., Legler, D., Llovel, W., Lyman, J., Palmer, M. D., Piotrowicz, S., Purkey, S. G., Roemmich, D., Roca, R., Savita, A., von Schuckmann, K., Speich, S., Stephens, G., Wang, G., Wijffels, S. E., & Zilberman, N. Measuring global ocean heat content to estimate the Earth energy Imbalance. Frontiers in Marine Science, 6, (2019): 432, doi: 10.3389/fmars.2019.00432.
    Description: The energy radiated by the Earth toward space does not compensate the incoming radiation from the Sun leading to a small positive energy imbalance at the top of the atmosphere (0.4–1 Wm–2). This imbalance is coined Earth’s Energy Imbalance (EEI). It is mostly caused by anthropogenic greenhouse gas emissions and is driving the current warming of the planet. Precise monitoring of EEI is critical to assess the current status of climate change and the future evolution of climate. But the monitoring of EEI is challenging as EEI is two orders of magnitude smaller than the radiation fluxes in and out of the Earth system. Over 93% of the excess energy that is gained by the Earth in response to the positive EEI accumulates into the ocean in the form of heat. This accumulation of heat can be tracked with the ocean observing system such that today, the monitoring of Ocean Heat Content (OHC) and its long-term change provide the most efficient approach to estimate EEI. In this community paper we review the current four state-of-the-art methods to estimate global OHC changes and evaluate their relevance to derive EEI estimates on different time scales. These four methods make use of: (1) direct observations of in situ temperature; (2) satellite-based measurements of the ocean surface net heat fluxes; (3) satellite-based estimates of the thermal expansion of the ocean and (4) ocean reanalyses that assimilate observations from both satellite and in situ instruments. For each method we review the potential and the uncertainty of the method to estimate global OHC changes. We also analyze gaps in the current capability of each method and identify ways of progress for the future to fulfill the requirements of EEI monitoring. Achieving the observation of EEI with sufficient accuracy will depend on merging the remote sensing techniques with in situ measurements of key variables as an integral part of the Ocean Observing System.
    Description: GJ was supported by the NOAA Research. MP and RK were supported by the Met Office Hadley Centre Climate Programme funded by BEIS and Defra. JC was partially supported by the Centre for Southern Hemisphere Oceans Research, a joint research centre between QNLM and CSIRO. CD and AS were funded by the Australian Research Council (FT130101532 and DP160103130) and its Centre of Excellence for Climate Extremes (CLEX). IQuOD team members (TB, RC, LC, CD, VG, MI, MP, and SW) were supported by the Scientific Committee on Oceanic Research (SCOR) Working Group 148, funded by the National SCOR Committees and a grant to SCOR from the U.S. National Science Foundation (Grant OCE-1546580), as well as the Intergovernmental Oceanographic Commission of UNESCO/International Oceanographic Data and Information Exchange (IOC/IODE) IQuOD Steering Group. ZZ was supported by the National Aeronautics and Space Administration (NNX17AH14G). LC was supported by the National Key Research and Development Program of China (2017YFA0603200 and 2016YFC1401800).
    Keywords: Ocean heat content ; Sea level ; Ocean mass ; Ocean surface fluxes ; ARGO ; Altimetry ; GRACE ; Earth Energy Imbalance
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 6
    Publication Date: 2023-05-25
    Description: Changes in ocean heat content (OHC), salinity, and stratification provide critical indicators for changes in Earth’s energy and water cycles. These cycles have been profoundly altered due to the emission of greenhouse gasses and other anthropogenic substances by human activities, driving pervasive changes in Earth’s climate system. In 2022, the world’s oceans, as given by OHC, were again the hottest in the historical record and exceeded the previous 2021 record maximum. According to IAP/CAS data, the 0–2000 m OHC in 2022 exceeded that of 2021 by 10.9 ± 8.3 ZJ (1 Zetta Joules = 1021 Joules); and according to NCEI/NOAA data, by 9.1 ± 8.7 ZJ. Among seven regions, four basins (the North Pacific, North Atlantic, the Mediterranean Sea, and southern oceans) recorded their highest OHC since the 1950s. The salinity-contrast index, a quantification of the “salty gets saltier–fresh gets fresher” pattern, also reached its highest level on record in 2022, implying continued amplification of the global hydrological cycle. Regional OHC and salinity changes in 2022 were dominated by a strong La Niña event. Global upper-ocean stratification continued its increasing trend and was among the top seven in 2022
    Description: Published
    Description: 963–974
    Description: 4A. Oceanografia e clima
    Description: JCR Journal
    Keywords: climate change, ocean warming, ocean heat content, stratification
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 7
    Publication Date: 2024-01-19
    Description: The global physical and biogeochemical environment has been substantially altered in response to increased atmospheric greenhouse gases from human activities. In 2023, the sea surface temperature (SST) and upper 2000 m ocean heat content (OHC) reached record highs. The 0–2000 m OHC in 2023 exceeded that of 2022 by 15 ± 10 ZJ (1 Zetta Joules = 1021 Joules) (updated IAP/CAS data); 9 ± 5 ZJ (NCEI/NOAA data). The Tropical Atlantic Ocean, the Mediterranean Sea, and southern oceans recorded their highest OHC observed since the 1950s. Associated with the onset of a strong El Niño, the global SST reached its record high in 2023 with an annual mean of ~0.23°C higher than 2022 and an astounding 〉 0.3°C above 2022 values for the second half of 2023. The density stratification and spatial temperature inhomogeneity indexes reached their highest values in 2023.
    Description: Published
    Description: OSA4: Ambiente marino, fascia costiera ed Oceanografia operativa
    Description: JCR Journal
    Repository Name: Istituto Nazionale di Geofisica e Vulcanologia (INGV)
    Type: article
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  • 8
    Electronic Resource
    Electronic Resource
    s.l. : American Chemical Society
    Analytical chemistry 42 (1970), S. 1528-1531 
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Sir — Microsatellites are oligonucleotide repeat sequences present throughout the human genome. The appearance of mutations within these regions, consisting of additions or deletions of repeat units, are known as the replication/repair error-positive (RER+) phenotype or microsatellite ...
    Type of Medium: Electronic Resource
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  • 10
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Endometrial cancer is the most common cancer of the female genital tract in America1 and Japan2. However, our knowledge regarding the molecular mechanisms underlying endometrial carcino-genesis is limited. Although mutations of p53 (also known as TP53; ref. 3) and ras4 have been reported in ...
    Type of Medium: Electronic Resource
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