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Articles de revues sur le sujet « Energy stratification »

Auteur : Grafiati

Publié le 2 juin 2025

Mis à jour le 31 juillet 2025

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1

Hall, Rob A., John M. Huthnance, and Richard G. Williams. "Internal Wave Reflection on Shelf Slopes with Depth-Varying Stratification." Journal of Physical Oceanography 43, no. 2 (2013): 248–58. http://dx.doi.org/10.1175/jpo-d-11-0192.1.

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Abstract Reflection of internal waves from sloping topography is simple to predict for uniform stratification and linear slope gradients. However, depth-varying stratification presents the complication that regions of the slope may be subcritical and other regions supercritical. Here, a numerical model is used to simulate a mode-1, M2 internal tide approaching a shelf slope with both uniform and depth-varying stratifications. The fractions of incident internal wave energy reflected back offshore and transmitted onto the shelf are diagnosed by calculating the energy flux at the base of slope (w

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Guo, Dong-Peng, Peng Zhao, Ren-Tai Yao, Yun-Peng Li, Ji-Min Hu, and Dan Fan. "Numerical and Wind Tunnel Simulation Studies of the Flow Field and Pollutant Diffusion around a Building under Neutral and Stable Atmospheric Stratifications." Journal of Applied Meteorology and Climatology 58, no. 11 (2019): 2405–20. http://dx.doi.org/10.1175/jamc-d-19-0045.1.

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AbstractIn this paper, the k–ε renormalization group (RNG) turbulence model is used to simulate the flow and dispersion of pollutants emitted from a source at the top of a cubic building under neutral and stable atmospheric stratifications, the results of which were compared with corresponding wind tunnel experiment results. When atmosphere stratification is stable, the separation zones on the sides and at the top of a building are relatively smaller than those under neutral conditions, and the effect of the building in the horizontal direction is stronger than that in the vertical direction.

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Rong, R. X., and G. J. Lyman. "A new energy dissipation theory of jig bed stratification. Part 2: a key energy parameter determining bed stratification." International Journal of Mineral Processing 37, no. 3-4 (1993): 189–207. http://dx.doi.org/10.1016/0301-7516(93)90026-7.

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Wang, Xinwei, Longbin Duan, Genying Gao, et al. "Analysis and Optimization of Thermal Storage Performance of Thermocline Storage Tank with Different Water Distribution Structures." Processes 13, no. 3 (2025): 629. https://doi.org/10.3390/pr13030629.

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Energy storage is essential for solar energy utilization, and thermocline storage tanks are commonly used. To improve temperature stratification and storage efficiency, we investigated the effect of different water distributor configurations on tank stratification. We numerically analyzed the heat storage processes in hot water tanks with three water distribution configurations: star, antenna, and octagonal. Temperature stratification was evaluated based on thermocline thickness and storage efficiency. Thermal storage efficiency improves by 0.45% when the outlet direction of the water distribu

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Hopper, George M., David J. Parrish, and David Wm Smith. "Adenylate energy charge during stratification and germination of Quercusrubra." Canadian Journal of Forest Research 15, no. 5 (1985): 829–32. http://dx.doi.org/10.1139/x85-134.

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In an effort to better understand dormancy in Quercusrubra, adenylate energy charge was measured during stratification and germination. Adenylate energy charge has been suggested as a useful index of metabolic activity and seed vigor. Adenylate nucleotides were measured using the luciferin–luciferase assay. Energy charge was compared with germinability at 28 days. Energy charge increased during the first 2 weeks of stratification when germination was low. Thereafter, energy charge decreased before increasing at 8 weeks of stratification. This second rise in energy charge coincided with increas

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Sargentis, G. Fivos, Theano Iliopoulou, Panayiotis Dimitriadis, Nikolaos Mamassis, and Demetris Koutsoyiannis. "Stratification: An Entropic View of Society’s Structure." World 2, no. 2 (2021): 153–74. http://dx.doi.org/10.3390/world2020011.

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In human societies, we observe a wide range of types of stratification, i.e., in terms of financial class, political power, level of education, sanctity, and military force. In financial, political, and social sciences, stratification is one of the most important issues and tools as the Lorenz Curve and the Gini Coefficient have been developed to describe some of its aspects. Stratification is greatly dependent on the access of people to wealth. By “wealth”, we mean the quantified prosperity which increases the life expectancy of people. Prosperity is also connected to the water-food-energy ne

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Zhang, Zheen, Xueen Chen, and Thomas Pohlmann. "The Impact of Fortnightly Stratification Variability on the Generation of Baroclinic Tides in the Luzon Strait." Journal of Marine Science and Engineering 9, no. 7 (2021): 703. http://dx.doi.org/10.3390/jmse9070703.

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The impact of fortnightly stratification variability induced by tide–topography interaction on the generation of baroclinic tides in the Luzon Strait is numerically investigated using the MIT general circulation model. The simulation shows that advection of buoyancy by baroclinic flows results in daily oscillations and a fortnightly variability in the stratification at the main generation site of internal tides. As the stratification for the whole Luzon Strait is periodically redistributed by these flows, the energy analysis indicates that the fortnightly stratification variability can signifi

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Arnqvist, Johan, Hugo Olivares-Espinosa, and Ingemar Carlén. "Wind energy relevant characteristics of turbulence over boreal forests." Journal of Physics: Conference Series 2767, no. 9 (2024): 092096. http://dx.doi.org/10.1088/1742-6596/2767/9/092096.

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Abstract Turbulence statistics from three tall meteorological masts and LES in forested landscapes are compared to standard turbulence models used for wind turbine design. The comparison is split into different atmospheric conditions to highlight the impact of stratification on the character of turbulence. The aim of the work is to clarify to which extent standard turbulence models are accurate over forested regions. To this end, different spectral measures such as power spectra and coherence are examined as well as vertical profiles of turbulence characteristics relevant to the design and sit

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Nagamalleswara Rao, Gujjar. "Comparison of Experimental and Simulation Studies on Thermal Stratification in a Thermal Energy Storage System." Journal of Advanced Research in Mechanical Engineering and Technology 05, no. 1&2 (2018): 17–24. http://dx.doi.org/10.24321/2454.8650.201802.

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Rosengarten, G., G. Morrison, and M. Behnia. "A Second Law Approach to Characterising Thermally Stratified Hot Water Storage With Application to Solar Water Heaters." Journal of Solar Energy Engineering 121, no. 4 (1999): 194–200. http://dx.doi.org/10.1115/1.2888166.

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This paper presents a method of characterising and evaluating the performance of hot water storage systems in terms of their temperature distribution. The change in exergy from the stratified state to the delivery state depends on the stored energy and the stratification. It can thus he used to define the storage efficiency for sensible heat storage devices. A new parameter that isolates the stratification component of the exergy is defined and called the stratification efficiency. The effect of temperature distribution, delivery temperature and tank cross-section on exergy and stratification

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Saenko, Oleg A., Xiaoming Zhai, William J. Merryfield, and Warren G. Lee. "The Combined Effect of Tidally and Eddy-Driven Diapycnal Mixing on the Large-Scale Ocean Circulation." Journal of Physical Oceanography 42, no. 4 (2012): 526–38. http://dx.doi.org/10.1175/jpo-d-11-0122.1.

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Abstract Several recent studies have shown that ocean western boundaries are the primary regions of eddy energy dissipation. Globally, the eddy energy sinks have been estimated to integrate to about 0.2 TW. This is a sizable fraction of the tidal energy dissipation in the deep oceanic interior, estimated at about 1.0 TW and contributing to diapycnal mixing. The authors conduct sensitivity experiments with an ocean general circulation model assuming that the eddy energy is scattered into high-wavenumber vertical modes, resulting in energy dissipation and locally enhanced diapycnal mixing. When

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Tan, Jun, Shiping He, and Zhenglong Du. "Numerical Simulation Study of Built-In Porous Obstacles to Improve the Thermal Stratification Performance of Storage Tanks." Applied Sciences 14, no. 15 (2024): 6529. http://dx.doi.org/10.3390/app14156529.

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Thermocline storage tanks are critical components in energy storage systems for solar renewable energy utilization. The use of thermal stratification of the working fluid within the storage tank for energy storage is a pivotal technology in these systems. Effective thermal stratification can significantly enhance energy storage efficiency, meet a broader range of user demands, and improve the overall performance of the storage tank. Therefore, enhancing the energy storage efficiency of storage tanks is an essential objective. To promote internal temperature stratification within the tank, this

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Vasholz, David P. "Low Froude number potential energy resonances in uniform stratification." Physics of Fluids 14, no. 2 (2002): 458–61. http://dx.doi.org/10.1063/1.1425838.

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Oró, Eduard, Albert Castell, Justin Chiu, Viktoria Martin, and Luisa F. Cabeza. "Stratification analysis in packed bed thermal energy storage systems." Applied Energy 109 (September 2013): 476–87. http://dx.doi.org/10.1016/j.apenergy.2012.12.082.

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Ferrarini, Luca, Giancarlo Mantovani, and Marta Pagliarini. "Improving Energy Efficiency in Large Buildings with Thermal Stratification." IFAC Proceedings Volumes 47, no. 3 (2014): 4885–90. http://dx.doi.org/10.3182/20140824-6-za-1003.02532.

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Ren, Jing-Jie, Jian-Yun Shi, Peng Liu, Ming-Shu Bi, and Kai Jia. "Simulation on thermal stratification and de-stratification in liquefied gas tanks." International Journal of Hydrogen Energy 38, no. 10 (2013): 4017–23. http://dx.doi.org/10.1016/j.ijhydene.2013.01.116.

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Zhang, Jin, Li Cheng, Yajun Wang, and Chenjuan Jiang. "The Impact of Tidal Straining and Advection on the Stratification in a Partially Mixed Estuary." Water 15, no. 2 (2023): 339. http://dx.doi.org/10.3390/w15020339.

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Stratification and mixing of the water column is an important dynamic process in the estuary, which plays a significant role in the estuarine circulation, mass transport and energy exchange. Based on the multi-station synchronous observation data from 26 February to 6 March in 2011 during dry season in the North Channel of the Changjiang Estuary, the Richardson number, the Simpson number and the potential energy anomaly of water were calculated to analyze the tidal variation of the mixing and stratification processes. The roles of the depth-mean straining, longitudinal advection, non-mean stra

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Jabeen, Sumaira, Tasawar Hayat, Sumaira Qayyum, and Ahmed Alsaedi. "Significance of activation energy in stratified flow of tangent hyperbolic fluid." International Journal of Numerical Methods for Heat & Fluid Flow 29, no. 8 (2019): 2932–47. http://dx.doi.org/10.1108/hff-12-2018-0795.

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Purpose The purpose of this paper is to address double stratification and activation energy in flow of tangent hyperbolic fluid. Flow is induced by non-linear stretching sheet of variable thickness. Heat flux by Cattaneo–Christov theory is implemented. Design/methodology/approach Non-linear system is computed for the convergent solutions. Attention is particularly focused to the velocity, temperature and concentration. Findings It is found that temperature and thermal layer thickness are decreased for larger stratification. Originality/value In view of aforementioned communication, the aim of

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Smusz, Robert, Paweł Kielan, and Damian Mazur. "Analysis of thermal stratified storage tank." Archives of Electrical Engineering 66, no. 3 (2017): 631–42. http://dx.doi.org/10.1515/aee-2017-0048.

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Abstract The basic aim of the task is to compile a temperature stratification system in an accumulation tank. The range of the thesis concerns the shape and dimensions of a stratification system for an accumulation tank. Thermal stratification is a process that comprises the maintaining of temperature stratification at different levels of an accumulation tank which reduce to a minimum the process of temperature equalization. It results from the fact that the thermal stratification in a tank significantly increases the installation efficiency and improves the process of energy storing. It is co

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NOVA, ANTONIO CARLOS BÔA. "Estratificação socioeconômica do consumo familiar de energia no Brasil." Brazilian Journal of Political Economy 6, no. 2 (1986): 291–302. http://dx.doi.org/10.1590/0101-31571986-2113.

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RESUMO Em meio às discussões da política energética, raramente a demanda é levada em consideração. Este artigo discute números referentes ao consumo doméstico de energia e visa contribuir para a formulação de políticas que entendam os diferentes efeitos e o que significa o acesso à energia para a população.

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Bao, Ting, and Zhen (Leo) Liu. "Geothermal energy from flooded mines: Modeling of transient energy recovery with thermohaline stratification." Energy Conversion and Management 199 (November 2019): 111956. http://dx.doi.org/10.1016/j.enconman.2019.111956.

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Song, Pengyang, and Xueen Chen. "Investigation of the Internal Tides in the Northwest Pacific Ocean Considering the Background Circulation and Stratification." Journal of Physical Oceanography 50, no. 11 (2020): 3165–88. http://dx.doi.org/10.1175/jpo-d-19-0177.1.

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AbstractA global ocean circulation and tide model with nonuniform resolution is used in this work to resolve the ocean circulation globally as well as mesoscale eddies and internal tides regionally. Focusing on the northwest Pacific Ocean (NWP, 0°–35°N, 105°–150°E), a realistic experiment is conducted to simulate internal tides considering the background circulation and stratification. To investigate the influence of a background field on the generation and propagation of internal tides, idealized cases with horizontally homogeneous stratification and zero surface fluxes are also implemented f

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Koszalka, I., L. Ceballos, and A. Bracco. "Vertical mixing and coherent anticyclones in the ocean: the role of stratification." Nonlinear Processes in Geophysics 17, no. 1 (2010): 37–47. http://dx.doi.org/10.5194/npg-17-37-2010.

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Abstract. The role played by wind-forced anticyclones in the vertical transport and mixing at the ocean mesoscale is investigated with a primitive-equation numerical model in an idealized configuration. The focus of this work is to determine how the stratification impacts such transport. The flows, forced only at the surface by an idealized wind forcing, are predominantly horizontal and, on average, quasigeostrophic. Inside vortex cores and intense filaments, however, the dynamics is strongly ageostrophic. Mesoscale anticyclones appear as "islands" of increased penetration of wind energy into

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Krafčík, Milan, and Jana Peráčková. "Experimental Measurements of Hot Water Stratification in a Heat Storage Tank in Laboratory Conditions." Periodica Polytechnica Mechanical Engineering 63, no. 4 (2019): 301–7. http://dx.doi.org/10.3311/ppme.13836.

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The paper focuses on the experimental measurement of the accumulation of hot water storage with its thermal stratificational thermal layers by means created of elementary conical elements. The basic principle of these elements is the automatic distribution of water temperatures according to temperature and volume flow for a specified time of storage of heat energy. This process involves maintaining the thermal stratification at different height levels of the storage tank, which minimizes the process of balancing the hot water. The aim of the experiments was to demonstrate the thermal energy la

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Colin de Verdière, Alain. "The Stability of Short Symmetric Internal Waves on Sloping Fronts: Beyond the Traditional Approximation." Journal of Physical Oceanography 42, no. 3 (2012): 459–75. http://dx.doi.org/10.1175/jpo-d-11-067.1.

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Abstract The interaction of internal waves with geostrophic flows is found to be strongly dependent upon the background stratification. Under the traditional approximation of neglecting the horizontal component of the earth’s rotation vector, the well-known inertial and symmetric instabilities highlight the asymmetry between positive and negative vertical components of relative vorticity (horizontal shear) of the mean flow, the former being stable. This is a strong stratification limit but, if it becomes too low, the traditional approximation cannot be made and the Coriolis terms caused by the

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KIMURA, HARUYASU, SATORU KOSAKI, YASUO TAKEUCHI, MICHIKAZU BAN, and MASAYOSHI KOHAMA. "Energy evaluation of stratification strength and vertical mixing under the stratification stage in culture ground (Uranouchi Bay)." Fisheries science 68, sup2 (2002): 1729–32. http://dx.doi.org/10.2331/fishsci.68.sup2_1729.

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WHITE, BRIAN L., and KARL R. HELFRICH. "Gravity currents and internal waves in a stratified fluid." Journal of Fluid Mechanics 616 (December 10, 2008): 327–56. http://dx.doi.org/10.1017/s0022112008003984.

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A steady theory is presented for gravity currents propagating with constant speed into a stratified fluid with a general density profile. Solution curves for front speed versus height have an energy-conserving upper bound (the conjugate state) and a lower bound marked by the onset of upstream influence. The conjugate state is the largest-amplitude nonlinear internal wave supported by the ambient stratification, and in the limit of weak stratification approaches Benjamin's energy-conserving gravity current solution. When the front speed becomes critical with respect to linear long waves generat

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Whitehead, Jared P., and Beth A. Wingate. "The influence of fast waves and fluctuations on the evolution of the dynamics on the slow manifold." Journal of Fluid Mechanics 757 (September 19, 2014): 155–78. http://dx.doi.org/10.1017/jfm.2014.467.

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AbstractThe effect of non-slow (typically fast) components of a rotating stratified Boussinesq flow on the dynamics of the slow manifold is quantified using a decomposition that isolates the part of the flow living on the slow manifold. In this system, there are three distinct asymptotic limits with corresponding reduced equations, each defining a slow manifold. All three of these distinct limits, namely rapid rotation, strong stratification, and simultaneous strong stratification and rapid rotation (quasi-geostrophy), are considered. Numerical simulations indicate that, for the geometry consi

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Han, Wang Kook, Jin Man Kim, Tae Hun Lim, Hae Eun Song, and Young Chull Ahn. "Temperature stratification using an air-cooled heat pump system with a mixing valve." Advances in Mechanical Engineering 12, no. 12 (2020): 168781402098465. http://dx.doi.org/10.1177/1687814020984653.

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The main factor determining the performance of a thermal storage method is the temperature stratification in the storage tank. At the ideal stratification, the energy efficiency of the storage tank is extremely high. However, when the heat pump is applied, the stratification is disrupted by heat exchange between the layers of the heat medium, and consequent convection in the tank. Therefore, this study analyzed the influence of stratification-related design factors in the water-piping facility area outside a tank heated by a heat pump. In particular, it assessed the thermal stratification and

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Hoerger, C. R. B., and W. F. Phillips. "The Stratification Coefficient Approach for Predicting the Performance of Solar Air Heating Systems Utilizing Packed Bed Heat Storage." Journal of Solar Energy Engineering 109, no. 3 (1987): 179–84. http://dx.doi.org/10.1115/1.3268203.

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The stratification coefficient approach is refined to allow its use for predicting the performance of solar air heating systems utilizing packed bed thermal energy storage. The partial differential equation governing the storage is eliminated from the analysis in the stratification coefficient approach. Elimination of this differential equation greatly simplifies the computation of system performance. Performance predictions calculated by the stratification coefficient approach are compared to those calculated by a numerical solution to the storage differential equation. The comparisons show g

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Lawrie, Andrew G. W., and Stuart B. Dalziel. "Rayleigh–Taylor mixing in an otherwise stable stratification." Journal of Fluid Mechanics 688 (November 3, 2011): 507–27. http://dx.doi.org/10.1017/jfm.2011.398.

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AbstractWe seek to understand the distribution of irreversible energy conversions (mixing efficiency) between quiescent initial and final states in a miscible Rayleigh–Taylor driven system. The configuration we examine is a Rayleigh–Taylor unstable interface sitting between stably stratified layers with linear density profiles above and below. Our experiments in brine solution measure vertical profiles of density before and after the unstable interface is allowed to relax to a stable state. Our analysis suggests that less than half the initially available energy is irreversibly released as hea

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Sahu, Digbash, and Rudra Kanta Deka. "Thermal and Mass Stratification Effects on MHD Flow Past an Accelerated Vertical Plate with Variable Temperature and Exponential Mass Diffusion Embedded in a Porous Medium." East European Journal of Physics, no. 2 (June 1, 2024): 161–71. http://dx.doi.org/10.26565/2312-4334-2024-2-15.

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This study looks at how the impacts of thermal and mass stratification on magnetohydrodynamic (MHD) flow alongside a vertically accelerating plate featuring variable temperature and exponential mass diffusion within a porous medium. The Laplace transform technique is utilized to solve the governing equations related to flow, energy, and mass diffusion. Subsequently, the impact of stratification on the flow field, temperature, and mass diffusion is examined. The study indicates that thermal and mass stratification significantly affects the profiles of velocity, temperature, and mass diffusion.

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Rodrigues, Fernando A., and Marcelo J. S. de Lemos. "STRATIFICATION AND ENERGY LOSSES IN A STANDBY CYCLE OF A THERMAL ENERGY STORAGE SYSTEM." International Journal of Energy for a Clean Environment 22, no. 5 (2021): 1–32. http://dx.doi.org/10.1615/interjenercleanenv.2021036711.

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Aynsley, Richard. "Estimates of Winter De-stratification Energy Savings in Large Warehouses." Architectural Science Review 48, no. 3 (2005): 257–63. http://dx.doi.org/10.3763/asre.2005.4832.

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Park, Dohyun, Dong-Woo Ryu, Byung-Hee Choi, Choon SunWoo, and Kong-Chang Han. "Methods to Characterize the Thermal Stratification in Thermal Energy Storages." Journal of Korean Society For Rock Mechanics 23, no. 1 (2013): 78–85. http://dx.doi.org/10.7474/tus.2013.23.1.078.

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Wang, Xiaohui, and Zhaoxi Sun. "Determination of Base-Flipping Free-Energy Landscapes from Nonequilibrium Stratification." Journal of Chemical Information and Modeling 59, no. 6 (2019): 2980–94. http://dx.doi.org/10.1021/acs.jcim.9b00263.

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Lamb, Peter, Dushyant V. Sahani, Jorge M. Fuentes-Orrego, Manuel Patino, Asish Ghosh, and Paulo R. S. Mendonca. "Stratification of Patients With Liver Fibrosis Using Dual-Energy CT." IEEE Transactions on Medical Imaging 34, no. 3 (2015): 807–15. http://dx.doi.org/10.1109/tmi.2014.2353044.

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Haseeb Syed, Abdul, Jakob Mann, Andreas Platis, and Jens Bange. "Turbulence above offshore wind farms measured by aircraft." Journal of Physics: Conference Series 2265, no. 2 (2022): 022065. http://dx.doi.org/10.1088/1742-6596/2265/2/022065.

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Abstract The flow inside and around large offshore wind farms may range from smaller and shorter structures present due to the mechanical turbulence generated by wind turbines to larger, and longer structures indicative of the mesoscale flow. In this study, we explore the variation in turbulence structures above large offshore wind farms located in the North Sea using the data obtained from a research aircraft. The aircraft was flown upstream, downstream, and above the wind farm clusters. We evaluate the normalized autocorrelation of the wind velocity component in the mean wind direction for t

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Voloshin, V. G., and V. Yu Kuryshina. "The function of the turbulent energy dissipation in the atmospheric surface layer." Ukrainian hydrometeorological journal, no. 16 (October 29, 2017): 67–75. http://dx.doi.org/10.31481/uhmj.16.2015.09.

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Introduction. The problem of energetics of atmospheric processes is one of the important problem in the modern meteorology. Distribution of the sources and sinks of energy, especially near the surface, also turbulent transport and transformation of energy reflect all features of the processes generated in the atmospheric boundary layer, their behavior and intensity. Purpose. A purpose of the work is a description of processes of production of turbulent kinetic energy (TKE) and dissipation rate of TKE in the surface layer, because transition of heat energy into TKE and vice versa, occurs

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Huang, Bin, Jiaoyang Li, Cheng Fu, Tianyue Guo, and Shengjie Feng. "A Comprehensive Review of Stratification and Rollover Behavior of Liquefied Natural Gas in Storage Tanks." Processes 10, no. 7 (2022): 1360. http://dx.doi.org/10.3390/pr10071360.

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Liquefied natural gas (LNG), as cleaner transitional energy than coal, is becoming increasingly prominent in the energy structure of various countries based on their low-carbon background, and its demand has grown rapidly worldwide. Storage tanks are the most commonly used LNG storage facilities. Owing to a variety of internal composition and external environmental factors, the instability phenomenon of LNG in the tanks may occur during storage, leading to potential safety risks. An in-depth understanding of the stratification and rollover behavior of LNG is therefore required to ensure and pr

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Yang, Fang, Xiaomei Ji, Wei Zhang, Huazhi Zou, Wenzhi Jiang, and Yanwen Xu. "Characteristics and Driving Mechanisms of Salinity Stratification during the Wet Season in the Pearl River Estuary, China." Journal of Marine Science and Engineering 10, no. 12 (2022): 1927. http://dx.doi.org/10.3390/jmse10121927.

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In an estuary, stratification processes play a major role in inhibiting estuarine circulation, sediment transport, and the estuarine ecosystem. A detailed examination of the salinity stratification through the gradient Richardson number and the potential energy anomaly equation has been undertaken along the West Channel of the Pearl River Estuary, China. The results show that the estuarine circulation within the West Channel is much weaker on a spring tide than that on a neap tide, exhibiting apparent spring–neap tidal variability. The calculated gradient Richardson number displays its intrati

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Zilitinkevich, Sergej, Oleg Druzhinin, Andrey Glazunov, et al. "Dissipation rate of turbulent kinetic energy in stably stratified sheared flows." Atmospheric Chemistry and Physics 19, no. 4 (2019): 2489–96. http://dx.doi.org/10.5194/acp-19-2489-2019.

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Abstract. Over the years, the problem of dissipation rate of turbulent kinetic energy (TKE) in stable stratification remained unclear because of the practical impossibility to directly measure the process of dissipation that takes place at the smallest scales of turbulent motion. Poor representation of dissipation causes intolerable uncertainties in turbulence-closure theory and thus in modelling stably stratified turbulent flows. We obtain a theoretical solution to this problem for the whole range of stratifications from neutral to limiting stable; and validate it via (i) direct numerical sim

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Xie, Jieshuo, Jiayi Pan, and David A. Jay. "Multimodal Internal Waves Generated over a Subcritical Ridge: Impact of the Upper-Ocean Stratification." Journal of Physical Oceanography 45, no. 3 (2015): 904–26. http://dx.doi.org/10.1175/jpo-d-14-0132.1.

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AbstractInteraction of barotropic tides with subsurface topography is vital to ocean mixing. Yet the behavior of large-amplitude, nonlinear, internal solitary waves (ISWs) that can cause strong mixing remains poorly understood, especially that of higher-mode and multimodal internal waves. Therefore, a 2.5-dimensional, nonhydrostatic model with adjustable vertical resolution was developed to investigate effects of upper-ocean stratification on tidally induced multimodal internal waves and to show how they are generated by the subcritical ridge where only upward-propagating internal wave beams (

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Araujo, Moacyr, Carmen Medeiros, and Cesar Ribeiro. "Energy balance and time-scales of mixing and stratification in the Jaboatão estuary, NE-Brazil." Revista Brasileira de Oceanografia 47, no. 2 (1999): 145–54. http://dx.doi.org/10.1590/s1413-77391999000200004.

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Estuarine systems undergo different physical processes that simultaneously control their stratification and mixing dynamics. This energy balance determines both, the estuarine hydrodynamics and the dynamics of water. This article presents a quantitative and comparative analyses between the forces maintaining stratification (surface heating; rainfall precipitation; and differential advection of the longitudinal density gradient due to the vertical velocity field) and those responsible for the vertical mixing (mechanical stirring of bottom tidal stress; mechanical stirring ofsurface wind stress;

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Hariharan, K., K. Badrinarayana, S. Srinivasa Murthy, and M. V. Krishna Murthy. "Temperature stratification in hot-water storage tanks." Energy 16, no. 7 (1991): 977–82. http://dx.doi.org/10.1016/0360-5442(91)90057-s.

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Sirman, Denis Yu. "Seed Germination of Coniferous Introduced Species in the Environment of Central Kazakhstan with Various Stratification and Inclusion of Needle Litter into Substrate." Lesnoy Zhurnal (Forestry Journal), no. 1 (February 10, 2023): 100–115. http://dx.doi.org/10.37482/0536-1036-2023-1-100-115.

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This study observes the issues of the possible usage of wastes from timber industry in the sprouting of seeds of coniferous plants in the arid climate of Central Kazakhstan. Such treatment of coniferous seeds is easily implementable and cost-effective, compared to the other methods. However, the complex chemical composition of needle litter in the soil substrate has the multifactorial and controversial effects on such indicators as germination energy, seed germination capacity and rest energy. In addition, the article discusses the use of long-term natural seed stratification as an alternative

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Oreyeni, Tosin, Anselm O. Oyem, Basma Souayeh, and Felix O. Okunlola. "Thermal Characteristics of Bioconvective Flow of a Shear-thinning Fluid Conveying Nanoparticles and Gyrotactic Cells within a Stratified Region." WSEAS TRANSACTIONS ON HEAT AND MASS TRANSFER 18 (December 31, 2023): 296–309. http://dx.doi.org/10.37394/232012.2023.18.26.

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Thermal stratification in solar thermal systems is important for energy extraction and storage, as well as for improving the efficiency and utilization of the trapped heat energy, leading to better economic feasibility for renewable energy sources. The significance of triple stratification with the Cattaneo-Christov model in the bio-convective nanoparticles flow of thixotropic fluid coexisting with gyrotactic microorganisms is presented in this study. The incorporation of the Cattaneo-Christov heat and mass flux into the fluid model allows for a more precise prediction of heat and mass phenome

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Shobo, A. B., A. Mawire, and D. Okello. "Experimental thermal stratification comparison of two storage systems." Energy Procedia 142 (December 2017): 3295–300. http://dx.doi.org/10.1016/j.egypro.2017.12.460.

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Raposo, Fortunato Lucas Quembo, Carlos Otávio Petter, and Weslei Monteiro Ambrós. "Unraveling Dry Jigging: Insights into Pulsation, Energy Consumption, and Stratification Dynamics." Minerals 14, no. 7 (2024): 678. http://dx.doi.org/10.3390/min14070678.

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The increasing concerns regarding water usage in mineral processing have led to a growing interest in dry jigging in recent years. However, there is still a need for a more comprehensive examination of the operational aspects of the technique. In this sense, this study focused on three main elements: (a) examining the air pulse pattern during dry jig operation; (b) assessing the evolution of the stratification profile over time using partition analysis; and (c) evaluating the specific energy consumption of batch dry jigging during operation. Also, an innovative operational strategy known as "t

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Otto, Henning, Christian Resagk, and Christian Cierpka. "Optical Measurements on Thermal Convection Processes inside Thermal Energy Storages during Stand-By Periods." Optics 1, no. 1 (2020): 155–72. http://dx.doi.org/10.3390/opt1010011.

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Thermal energy storages (TES) are increasingly important for storing energy from renewable energy sources. TES that work with liquid storage materials are used in their most efficient way by stratifying the storage fluid by its thermal density gradient. Mixing of the stratification layers during stand-by periods decreases the thermal efficiency of the TES. Tank sidewalls, unlike the often poorly heat-conducting storage fluids, promote a heat flux from the hot to the cold layer and lead to thermal convection. In this experimental study planar particle image velocimetry (PIV) measurements and ba

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