Relevant bibliographies by topics / Heat storage Two-phase flow

Contents

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

Academic literature on the topic 'Heat storage Two-phase flow'

Author: Grafiati
Published: 4 June 2021
Last updated: 18 February 2022

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Journal articles on the topic "Heat storage Two-phase flow"

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Tanino, Masayuki, and Yoshiyuki Kozawa. "Ice-water two-phase flow behavior in ice heat storage systems." International Journal of Refrigeration 24, no. 7 (July 2001): 639–51. http://dx.doi.org/10.1016/s0140-7007(00)00085-2.

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Sun, Yong, Feng Xu, Yong Jiang Shi, Xiao Yang Ji, and Tian Liang Liu. "Heat Storage Performance of Heating System of Phase Change Heat Storage." Applied Mechanics and Materials 214 (November 2012): 82–86. http://dx.doi.org/10.4028/www.scientific.net/amm.214.82.

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An experimental table of the heating system of phase change heat storage is built with thermal-storage tank packaging phase change material, which transferred heat with internal fluid. The flow rate, inlet temperature, outlet temperature of internal fluid and the temperature of heat storage material are measured. The influences on the properties of heat storage system are analyzed.
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El-Dessouky, H. T., W. S. Bouhamra, H. M. Ettouney, and M. Akbar. "Heat Transfer in Vertically Aligned Phase Change Energy Storage Systems." Journal of Solar Energy Engineering 121, no. 2 (May 1, 1999): 98–109. http://dx.doi.org/10.1115/1.2888158.

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Convection effects on heat transfer are analyzed in low temperature and vertically aligned phase change energy storage systems. This is performed by detailed temperature measurements in the phase change material (PCM) in eighteen locations forming a grid of six radial and three axial positions. The system constitutes a double pipe configuration, where commercial grade paraffin wax is stored in the annular space between the two pipes and water flows inside the inner pipe. Vertical alignment of the system allowed for reverse of the flow direction of the heat transfer fluid (HTF), which is water. Therefore, the PCM is heated from the bottom for HTF flow from bottom to top and from the top as the HTF flow direction is reversed. For the former case, natural convection affects the melting process. Collected data are used to study variations in the transient temperature distribution at axial and radial positions as well as for the two-dimensional temperature field. The data is used to calculate the PCM heat transfer coefficient and to develop correlations for the melting Fourier number. Results indicate that the PCM heat transfer coefficient is higher for the case of PCM heating from bottom to top. Nusselt number correlations are developed as a function of Rayleigh, Stefan, and Fourier numbers for the HTF flow from bottom to top and as a function of Stefan and Fourier numbers for HTF flow from top to bottom. The enhancement ratio for heat transfer caused by natural convection increases and then levels off as the inlet temperature of the HTF is increased.
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Zhang, Ji-Min, Shi-Ting Ruan, Jian-Guang Cao, and Tao Xu. "Flow and heat transfer performance of plate phase change energy storage heat exchanger." Thermal Science 23, no. 3 Part B (2019): 1989–2000. http://dx.doi.org/10.2298/tsci170821072z.

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In the present work, the phase change energy storage heat exchanger in thermal control system of short-time and periodic working satellite payloads is taken as the research object. Under the condition of constant heated power of the satellite payload, the heat transfer characteristics of phase change energy storage heat exchanger are analyzed by numerical simulation and experimental method. The heat exchanger with fin arrays to enhance heat transfer is filled with tetradecane, whose density varies with temperature. The flow field distribution, the solid-liquid distribution, the temperature distribution, and the phase change process in the plate phase change energy storage heat exchanger unit are analyzed. The flow and heat transfer characteristics of heat exchangers under different fluid-flow rates and temperature were investigated.
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KITAZAWA, Genki, Terumi INAGAKI, and Tomonori UEZU. "916 Heat Flow Characteristic of Phase Change Latent Heat Storage Material in Liquid Phase State." Proceedings of Ibaraki District Conference 2010.18 (2010): 269–70. http://dx.doi.org/10.1299/jsmeibaraki.2010.18.269.

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Medeiros, Pedro Samuel Gomes, Cleiton Rubens Formiga Barbosa, and Francisco De Assis Oliveira Fontes. "SINGLE-PHASE AND TWO-PHASE SECONDARY COOLANTS: SIMULATION AND EVALUATION OF THEIR THERMOPHYSICAL PROPERTIES." HOLOS 4 (September 26, 2011): 91. http://dx.doi.org/10.15628/holos.2011.540.

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This paper makes a comparative analysis of the thermophysical properties of ice slurry with conventional single-phase secondary fluids used in thermal storage cooling systems. The ice slurry is a two-phase fluid consisting of water, antifreeze and ice crystals. It is a new technology that has shown great energy potential. In addition to transporting energy as a heat transfer fluid, it has thermal storage properties due to the presence of ice, storing coolness by latent heat of fusion. The single-phase fluids analyzed are water-NaCl and water-propylene glycol solutions, which also operate as carrier fluids in ice slurry. The presence of ice changes the thermophysical properties of aqueous solutions and a number of these properties were determined: density, thermal conductivity and dynamic viscosity. Data were obtained by software simulation. The results show that the presence of 10% by weight of ice provides a significant increase in thermal conductivity and dynamic viscosity, without causing changes in density. The rheological behavior of ice slurries, associated with its high viscosity, requires higher pumping power; however, this was not significant because higher thermal conductivity allows a lower mass flow rate without the use of larger pumps. Thus, the ice slurry ensures its high potential as a secondary fluid in thermal storage cooling systems, proving to be more efficient than single-phase secondary fluids.
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Inaba, H., and S. Morita. "Flow and Cold Heat-Storage Characteristics of Phase-Change Emulsion in a Coiled Double-Tube Heat Exchanger." Journal of Heat Transfer 117, no. 2 (May 1, 1995): 440–46. http://dx.doi.org/10.1115/1.2822541.

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This paper dealt with the flow and cold heat-storage characteristics of the oil (tetradecane, C14H30, freezing point 278.9 K)/water emulsion as a latent heat-storage material having a low melting point. A coiled double-tube heat exchanger was used for the cold heat-storage experiment. The pressure drop, the heat transfer coefficient, and the finishing time of cold heat storage in the coiled tube were measured as experimental parameters. It was understood that the flow behavior of the emulsion as a non-New-tonian fluid had an important role in the present cold heat storage. The useful nondi-mensional correlation equations for the additional pressure loss coefficient, the heat transfer coefficient, and the cold heat storage time were derived in terms of modified Dean number and heat capacity ratio.
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Andrássy, Z., and Z. Szánthó. "Modelling of latent thermal energy storage systems." International Review of Applied Sciences and Engineering 8, no. 1 (June 2017): 51–56. http://dx.doi.org/10.1556/1848.2017.8.1.8.

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In this paper phase change materials are presented, as effective thermal energy storage due to their great latent heat storing possibility. The main substance used for thermal energy storage purposes is water. Storing the energy with water is not that effective as with phase change materials, because the temperature of water has to change, and it worsen the heat exchange intensity. On the other hand, with phase change materials the temperature of the material does not have to change due to the latent heat storage possibilities. A buffer tank with two pipe coils filled with phase change materials is investigated with the aim to reduce the storage volume. An own thermodynamic model, a CFD simulation and an experimental system are presented. The models could be validated and the process of phase change could be examined with a life-size thermal energy storage system in the laboratory of the department. The performance of heat absorption and release of the phase change material could be calculated in the function of inlet water temperature and mass flow.
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Charach, C., M. Conti, and C. Bellecci. "Thermodynamics of Phase-Change Storage in Series With a Heat Engine." Journal of Solar Energy Engineering 117, no. 4 (November 1, 1995): 336–41. http://dx.doi.org/10.1115/1.2847888.

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This paper addresses thermodynamics of phase-change storage elements in series with heat engines. It is assumed that the duration of the heat storage and the discharge are equal. It is also assumed that the same heat transfer fluid (HTF) with a constant flow rate is used for the whole cycle. The major constraint imposed on these systems is the stability of the temperature of the HTF supplied to the engine during the storage-discharge cycle. It is shown, for this setup, that the freezing point of the phase-change material (PCM) is defined by the First Law. Maximal stability corresponds to the freezing point equal to the arithmetic mean of the inlet temperatures of the hot and the cold streams. An analytic expression is developed for the Second Law efficiency of the heat storage-removal cycle for the phase-change element in series with an engine. It yields maximal entropy production in the absolute stability limit. Two analytically tractable models of a phase-change storage in series with a heat engine are studied in detail. One involves a PCM slab, and the second involves a PCM tube-and-shell heat exchanger.
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Romero, Oldrich Joel, Hugo Candiá Saad, Isabela Braga Pereira, and Mao Ilich Romero. "Influence of heat transfer on two-phase flow behavior in onshore oil pipelines." Ingeniería e Investigación 36, no. 1 (April 18, 2016): 14–22. http://dx.doi.org/10.15446/ing.investig.v36n1.51570.

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<p>Computational tools for simulation of multiphase flow in oil pipelines are of great importance for the determination of the technical feasibility of the production in oilfields. The present article presents the mathematical and numerical modeling of the oil biphasic flow in a partially submerged onshore pipeline. The biphasic behavior of the heavy oil of 13,2ºAPI is translated by the Dukler correlation. The oil’s viscosity is regarded as dependent on the temperature and on the API density of the oil by means of the Hossain correlation. The pipeline, of 3,600m and 4 inches (10.16cm) in diameter, transports the oil from a collecting station to a storage center and consists of three sections. The first and third sections are above ground and are in contact with the external environment. The intermediate section is sitting on the river bed and is the critical part of the pipeline, once high heat losses are observed. The influence on the type of pipe insulation in the pressure and temperature gradients was analyzed with the aid of commercial 1D software Pipesim®. The results, of this 1D and non-isothermal problem with prescribed outlet pressure, show that the use of isolation when appropriately designed in terms of material quality and thickness is of utmost importance to maintain the heat transfer at low levels, in order to ensure the movement of fluids in long sections without compromising the system operation.</p>
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Dissertations / Theses on the topic "Heat storage Two-phase flow"

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Thibodeau, Anne-Marie Bechard. "Numerical Model of the Transient Effects of a Heat of Fusion Reservoir Interacting with Two-phase Flow." Fogler Library, University of Maine, 2002. http://www.library.umaine.edu/theses/pdf/ThibodeauAMB2002.pdf.

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Xu, Ben. "Heat Transfer and Flow in Solar Energy and Bioenergy Systems." Diss., The University of Arizona, 2015. http://hdl.handle.net/10150/578616.

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The demand for clean and environmentally benign energy resources has been a great concern in the last two decades. To alleviate the associated environmental problems, reduction of the use of fossil fuels by developing more cost-effective renewable energy technologies becomes more and more significant. Among various types of renewable energy sources, solar energy and bioenergy take a great proportion. This dissertation focuses on the heat transfer and flow in solar energy and bioenergy systems, specifically for Thermal Energy Storage (TES) systems in Concentrated Solar Power (CSP) plants and open-channel algal culture raceways for biofuel production. The first part of this dissertation is the discussion about mathematical modeling, numerical simulation and experimental investigation of solar TES system. First of all, in order to accurately and efficiently simulate the conjugate heat transfer between Heat Transfer Fluid (HTF) and filler material in four different solid-fluid TES configurations, formulas of an effective heat transfer coefficient were theoretically developed and presented by extending the validity of Lumped Capacitance Method (LCM) to large Biot number, as well as verifications/validations to this simplified model. Secondly, to provide design guidelines for TES system in CSP plant using Phase Change Materials (PCM), a general storage tank volume sizing strategy and an energy storage startup strategy were proposed using the enthalpy-based 1D transient model. Then experimental investigations were conducted to explore a novel thermal storage material. The thermal storage performances were also compared between this novel storage material and concrete at a temperature range from 400 °C to 500 °C. It is recommended to apply this novel thermal storage material to replace concrete at high operating temperatures in sensible heat TES systems. The second part of this dissertation mainly focuses on the numerical and experimental study of an open-channel algae culture raceway for biofuel production. According to the proposed flow field design of ARID-HV algal raceway, experiments and numerical simulation have been conducted to understand the enhancement of flow mixing in the flow field of ARID-HV raceway by cutting slots on top of the dam near the dead zones. A new method was proposed to quantitatively evaluate the flow mixing by using the statistics of temporal and spatial distribution of the massless fluid particles (centered in each cell at the inlet surface) in the raceway collecting the data of path-lines of fluid particles from CFD results. It is hoped that this method can be applied to assist the algal raceway flow field design as well as other engineering applications. The third part introduces the details about the construction work of a high temperature molten salt test loop. Because of the limited operating temperature of conventional synthetic oils, in order to obtain higher energy conversion efficiency, higher operating temperature is always desirable in a CSP plant which leads to the requirement of new generation of HTF. Currently, a halide salt eutectic mixture (NaCl-KCl-ZnCl₂) as a potential HTF for future CSP applications has been proposed by a multi-institute research team, led by University of Arizona. The thermophysical properties of the halide eutectic salt have been measured. However, this new developed halide eutectic salt has not been tested in a circulating loop at a high operating temperature for the measurement of heat transfer coefficient. It is a significant effort to build such a test system due to extremely high operating temperature. As a consequence, in the third part of this dissertation, details about the design of the lab-scale test system and all the equipment items will be introduced. The investigations included in this dissertation for the heat transfer and flow in solar energy and bioenergy systems are of particular interest to the renewable energy engineering community. It is expected that the proposed methods can provide useful information for engineers and researchers.
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Vist, Sivert. "Two-phase Flow Distribution in Heat Exchanger Manifolds." Doctoral thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-199.

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The current study has investigated two-phase refrigerant flow distribution in heat exchange manifolds. Experimental data have been acquired in a heat exchanger test rig specially made for measurement of mass flow rate and gas and liquid distribution in the manifolds of compact heat exchangers. Twelve different manifold designs were used in the experiments, and CO2 and HFC-134a were used as refrigerants.

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Halimic, Elvedin. "Two-phase flow heat transfer in micro-channels." Thesis, University of Newcastle Upon Tyne, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.578553.

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The requirement of modern industrial society is to continuously improve the performance of manufactured products and most notably increase performance density. At the same time, this has caused the micro-electronics industry to be faced with increasingly high heat fluxes which need to be dissipated. It is expected in few years that advanced microprocessors will be dissipating heat fluxes as high as 300 W/cm2 and require cooling to maintain device temperature below a limit that is set by reliability and material concerns. This limit varies, from 85°C for commercial microprocessors to 125°C for defence electronics applications. Flow boiling in micro-channels is gaining significant attention in recent years due to its capability to dissipate very high heat fluxes. The major advantage of flow boiling systems is the ability of the fluid to carry larger amounts of thermal energy through the latent heat of vaporisation. For the performance assessment and design of a micro-channel cooling device, it is very important to be able to define accurately the pressure drop and flow boiling heat transfer for a given operating condition for a particular micro-channel geometry. The present study aims to add to the knowledge of the fundamentals of two-phase flow heat transfer in a micro-channel heat sink with parallel small passages, through analysis of the effect of different fluid properties, operational conditions and channel sizes. The database includes test results for two different fluids, deionised water and refrigerant R134a, for a total of over 1400 data points. The experimental data was compared to several correlations from literature. An observation of the two-phase flow was conducted with and without an orifice (porous insert) positioned at the inlet of micro-channels. Visualisation confirmed the existence of the back flow, flow instability and non-uniform flow distribution among the channels (maldistribution) when the porous insert was removed. Flow patterns in the micro- channels and their evolution with increasing heat flux were observed. Keywords: Two-phase flows, micro-channel, heat transfer, pressure drop, flow pattern.
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Kelly, Barry P. "Liquid-particle heat transfer in two phase flow systems." Thesis, Queen's University Belfast, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.286853.

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Lintern, Andrew Charles. "Applications of two-phase flow and heat transfer in compact heat exchangers." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/10549.

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Three applications of two-phase flow and heat transfer in plate-fin heat exchangers have been studied. A dephlegmator is a heat exchanger in which reflux condensation of a vapour mixture occurs, and plate-fln versions have importance in cryogenic gas separation processes. Numerical calculations for different binary mixtures show that the number of transfer units can be expressed as a simple function of the inlet vapour state and flow rate, heat load, and channel geometry. The calculations also show that the vapour and liquid exit compositions tend to limiting values as the number of transfer units increase. These limiting values correspond to liquid leaving the exchanger in equilibrium with the vapour entering. The effect of surface tension on liquid running down the rectangular passages of plate-fin exchangers is to draw it to the corners leaving less liquid on the walls and possible dry-out. A comparison of two CFD calculations with and without surface tension shows that effect can be significant. For a liquid with a surface tension only 1% that of water, about 50% more mass flows down the corner region of a square duct of side 0.944 mm. This transfer of liquid to the corner takes place in the first millimetre of flow downwards. Experimental measurements of pressure drop were taken for air and air-water flow through eight different plate-fin pads. The two-phase pressure drops for the serrated fin were two to five times larger than those for the plain fin. However, the effect of increasing the water flow rate at a fixed air flow rate was to increase the pressure drop by up to 75% in both cases. Over 200 two-phase pressure drops measurements were made, nearly all of the data were predicted to within 20% by the Lockhart and Martinelli (1949) correlation with C factor of 12.
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Al-sarraf, Hayder Hasan Jaafar. "Modeling Two Phase Flow Heat Exchangers for Next Generation Aircraft." Wright State University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=wright1503935509157319.

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Jackson, Jelliffe Kevin. "Cryogenic two-phase flow during chilldown flow transition and nucleate boiling heat transfer /." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0014782.

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Valha, Jan. "Interfacial instability and spray heat transfer problems of two phase flow." Thesis, Middlesex University, 1996. http://eprints.mdx.ac.uk/6408/.

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This thesis describes detailed investigations of two different problems in gas-liquid two-phase flow, namely, a study of interfacial stability in a partially filled cylinder subjected to vertical oscillations and a study of heat and mass transfer from hot spray droplets injected into an closed vessel. The interfacial instability study considers experimental data taken from the author's previous work. Cylinders of various diameters, partially filled with water, ethanol or glycerol were subjected to a sinusoidal vertical motion. The critical acceleration, causing the interfacial wave to grow unstable, was found to be approximately constant for a given cylinder diameter, independent on the amplitude of the forcing oscillations. The experiments also indicate that the critical Acceleration always decreases with increasing cylinder diameter. A mathematical analysis of the interfacial instability is based on a stability investigation of a Mathieu equation. It is shown that the experimental data fall into unstable regions for a single, first mode of oscillations. This finding is supported by the experimental analysis given by Cilliberto and Gollub. The analysis shows the effects of the liquid column height on the interfacial instability to be dependent on tanh (k..l.). This multiplier is equal to 1 for the column heights of 250mm, 500 mm and 750 mm, investigated, and a given cylinder diameter, thus having no effect on the results. Computational analysis of the interfacial problem is developed which is based on the simplified MAC method incorporating the Continuum Surface Force (CSF) model for simulating the effects of surface tension. Computational experiments were run for water and glycerol, the two liquids of significantly different properties. The results are presented in the form of time sequenced plots showing the interfacial positions and graphs relating the interfacial wave amplitude and time. Stability of the interface is found to be dependent on the initial surface disturbance. Growth of the interfacial wave is observed in some cases. In the range of situations investigated, surface tension effects are found to have only a small influence both on the stability and frequency of the interfacial oscillations. The period of interfacial oscillations with no forcing vibrations is found to be in good agreement with the period predicted by mathematical analysis. Influence of the initial disturbance profile was also investigated. The results indicate that the interfacial wave adopts oscillatory behaviour similar to the other cases. The oscillation frequency of the interfacial wave undergoing forcing vibrations is found to match the findings of the mathematical analysis. The wave oscillates with an angular velocity equal to the multiples of the half the forcing vibration angular velocity, co/2. In the second investigation a testing rig was constructed to investigate the heat and mass transfer processes in dense hot sprays injected into an enclosed cylindrical vessel. Heat and mass transfer rates were investigated indirectly from the measurements of the gas - vapour mixture pressure rise in the cylinder. The experiments covered different combinations of the parameters influencing the processes. The number and size of spray nozzles, the vessel volume, the type of gas and the initial pressure level in the cylinder were investigated. The experimental results indicate that, for the range of solid cone nozzles tested, the heat and mass transfer characteristics are, to a first approximation independent of the size of the nozzles. The results also show that the rise of spray chamber internal pressure is directly proportional to liquid temperature and flowrate. An analysis, based on energy balances for the whole cylinder, has yielded a new dimensionless group incorporating the important parameters of droplet heat transfer namely the droplet velocity and radius, spray chamber dimensions, gravity, conductivity and convectivity. A good match has been found between the analytical results and experimental findings. An improved analysis, incorporating the effect of evaporation from drops, is also presented. It is based on simultaneous solution of energy and mass balance equations for a single droplet. Again, good agreement with the experimental results is found. Both analyses indicate that, for this particular case of dense, evaporative spray, the Nusselt number tends to have a value equal to I.
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Pate, Daniel Thomas Bhavnani S. H. "Experimental investigation of cavity induced two phase flow in silicon microchannels." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Theses/PATE_DANIEL_19.pdf.

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Books on the topic "Heat storage Two-phase flow"

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Kakaç, Sadik, Arthur E. Bergles, and E. Oliveira Fernandes, eds. Two-Phase Flow Heat Exchangers. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2790-2.

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Whalley, P. B. Two-phase flow and heat transfer. Oxford: Oxford University Press, 1996.

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Two-Phase Heat Exchanger Symposium (1985 Denver, Colo.). Two-Phase Heat Exchanger Symposium. New York, N.Y. (345 E. 47th St., New York 10017): American Society of Mechanical Engineers, 1985.

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Two-Phase Heat Exchanger Symposium (1985 Denver, Colo.). Two-Phase Heat Exchanger Symposium. New York,N.Y. (345 E. 47th St., New York 10017): American Society of Mechanical Engineers, 1985.

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Two-Phase, Heat Exchanger Symposium (1985 Denver Colo ). Two-Phase Heat Exchanger Symposium. New York, N.Y. (345 E. 47th St., New York 10017): American Society of Mechanical Engineers, 1985.

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1922-, Tang Y. S., ed. Boiling heat transfer and two-phase flow. 2nd ed. Washington, D.C: Taylor & Francis, 1997.

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Gabriel, Kamiel S. Microgravity Two-Phase Flow and Heat Transfer. Dordrecht: Springer Netherlands, 2007. http://dx.doi.org/10.1007/1-4020-5143-3.

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1919-, Chʼen Hsüeh-chün, Veziroğlu T. Nejat, Hsi-an chiao tʼung ta hsüeh. Kung chʼeng je wu li yen chiu so., University of Miami. Clean Energy Research Institute., China Chiao yü pu, and National Science Foundation (U.S.), eds. Two-phase flow and heat transfer: China-U.S. progress. Washington: Hemisphere Pub. Corp., 1985.

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F, Nogotov E., and Trofimov V. P, eds. Radiative heat transfer in two-phase media. Boca Raton, Fla: CRC Press, 1993.

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Kakaç, Sadik. Two-Phase Flow Heat Exchangers: Thermal-Hydraulic Fundamentals and Design. Dordrecht: Springer Netherlands, 1988.

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Book chapters on the topic "Heat storage Two-phase flow"

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Fasanino, Guy, and Jean-Eric Molinard. "Two-Phase Flow Simulation." In Underground Storage of Natural Gas, 265–99. Dordrecht: Springer Netherlands, 1989. http://dx.doi.org/10.1007/978-94-009-0993-9_19.

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Bergles, A. E. "Heat Transfer Augmentation." In Two-Phase Flow Heat Exchangers, 343–73. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2790-2_10.

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Schmidt, Holger, Anton Wellenhofer, Sebastian Muschelknautz, Jürgen Schmidt, Florian Schmidt, Dieter Mewes, Alfons Mersmann, and Johann Stichlmair. "L2 Two-Phase Gas-Liquid Flow." In VDI Heat Atlas, 1117–80. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-77877-6_78.

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Sommerfeld, Martin, Karl-Ernst Wirth, and Ulrich Muschelknautz. "L3 Two-Phase Gas-Solid Flow." In VDI Heat Atlas, 1181–238. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-77877-6_85.

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Kilkiş, B. "Gas-Solid Heat Exchangers." In Two-Phase Flow Heat Exchangers, 993–1030. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2790-2_32.

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Saha, Sujoy Kumar, Hrishiraj Ranjan, Madhu Sruthi Emani, and Anand Kumar Bharti. "Flow Boiling Enhancement Techniques." In Two-Phase Heat Transfer Enhancement, 43–77. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-20755-7_3.

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Poinsot, Thierry. "Two-Phase Flow Combustion." In Instabilities of Flows: With and Without Heat Transfer and Chemical Reaction, 267–85. Vienna: Springer Vienna, 2010. http://dx.doi.org/10.1007/978-3-7091-0127-8_10.

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Taborek, Jerry. "Strategy of Heat Exchanger Design." In Two-Phase Flow Heat Exchangers, 473–93. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2790-2_14.

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Kakaç, S., and E. Paykoç. "Basic Relationships for Heat Exchangers." In Two-Phase Flow Heat Exchangers, 29–80. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2790-2_2.

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Mayinger, F. "Classification and Applications of Two-Phase Flow Heat Exchangers." In Two-Phase Flow Heat Exchangers, 3–27. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2790-2_1.

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Conference papers on the topic "Heat storage Two-phase flow"

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Ye, Fang, Hang Guo, and Chongfang Ma. "Two-Phase Flow in Anode Serpentine Flow Field of a Direct Methanol Fuel Cell." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-23130.

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Fuel Cells have attracted much attention. Liquid fed direct methanol fuel cells (DMFCs), which have many important advantages over such as the easy storage and refilling of the aqueous methanol solution, are considered to be good choices for small mobile devices. Water and carbon dioxide are the sole fuel oxidized byproducts. The anode side of liquid fed DMFC is a two-phase system primarily consisting of methanol solution and carbon dioxide bubbles. In this paper, a transparent direct methanol fuel cell was designed and fabricated for investigations of two-phase flow characteristics in anode serpentine flow field. In situ observations of the carbon dioxide bubbles and two-phase flow patterns inside the flow field were made. The effects of cell current, methanol solution flow rate and methanol solution mole concentration on the flow patterns and cell performance were studied, respectively. Experimental results indicate that the electrochemical reaction and two-phase flow characteristics interacted each other. The mean size of CO2 bubbles and the gas void fraction increased with increase in current density. The typical flow patterns are bubbly flow and slug flow. At the upside down U type location of the serpentine channel, long slug bubbles easily formed and blocked the channel. The gas void fraction decreased with increase in methanol solution flow rate. The methanol solution mole concentration influences the two-phase flow slightly.
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Bonadies, Monica F., Mark Ricklick, and J. S. Kapat. "Optimization of a Phase Change Thermal Storage Unit." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22984.

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When collecting the energy of the sun for domestic use, several options exist, one being the use of evacuated tube collectors with internal heat pipes. This study proposes a system integrating these collectors with a storage unit using the phase change of paraffin wax to store energy. The storage unit makes use of a finned heat exchanger, with paraffin wax on the shell side and glycol on the tube side as the heat transfer fluid. The heat exchanger is embedded within the storage paraffin wax with a volume of 2 ft3. The heat exchanger also includes a separate loop for water to flow through and receive thermal energy from the melted wax. Although the wax has the benefit of being inexpensive and nontoxic, it has the problem of low thermal conductivity. Therefore, the heat exchanger has large copper fins brazed to it to extend areas of high thermal conductivity into the wax reservoir. The unit used in this study contains 14 fins. The use of fins will help to speed up the melting of the wax while solar energy is collected, since there is more heat transfer area. When most of the wax is melted, heat can be exchanged to water for domestic use. To determine the benefit of the fins, wax and working fluid temperature data will be taken from a constructed thermal energy storage unit, and then it is used to verify a finite-difference analytical model of the thermal operating characteristics. The maximum operating temperature of the glycol/water mix heat transfer fluid was approximately 65° C when the fluid flowed at 1 gallon per minute. The storage unit was able to store melted wax overnight with a 2–3°C temperature drop with the ambient temperature approximately at 30°C. City water at approximately 3 gpm was used to test the freezing side. The one dimensional model proved useful in predicting the heat storage mode of the system but had some error in predicting the heat release mode of the unit. The model also points to the fact that there are several considerations to be taken when simulating phase change energy storage processes.
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Deisenroth, David C., Avram Bar-Cohen, and Michael Ohadi. "Geometry Effects on Two-Phase Flow Regimes in a Diabatic Manifolded Microgap Channel." In ASME 2017 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2017 Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/ipack2017-74287.

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Two-phase cooling has become an increasingly attractive option for thermal management of high-heat flux electronics. Cooling channels embedded directly on the back of the heat source (chip) facilitate two-phase boiling/evaporation effectiveness, eliminating many thermal resistances generated by more traditional, remote chip-cooling approaches. Accordingly, manifold-microchannel flow paths in embedded cooling systems can allow very high heat fluxes with low junction temperatures. But, the effect of the feeding manifold design, channel geometry, and the associated shear, stagnation zones, and centripetal accelerations with varying heat flux and mass flux are not well understood. This study builds upon our previous work and elucidates effects of channel geometry, mass flux, and outlet quality on the boiling/evaporation flow regimes in a manifolded microgap channel.
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Wei, Jinjia, Yasuo Kawaguchi, Satoshi Hirano, and Hiromi Takeuchi. "Study on a PCM Heat Storage System for Rapid Heat Supply." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-61025.

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A thermal energy storage system employing phase change material (PCM) for rapid heat discharge was studied numerically and experimentally. In the numerical studies, paraffin wax FNP-0090 (product of Nippon Seiro Co. Ltd.) was used as the PCM and was encapsulated in four different capsules (sphere, cylinder, plate and tube) for investigating the effects of geometrical configurations. The capsules filled with PCM were placed in a rectangular tank. Water was used as the working fluid in a rectangular tank. Water was used as the working fluid in the circulation system to discharge the storage tank. A one-dimensional model was used for solving the water temperature distribution along the flow direction in the tank and a conductive one-dimensional phase change model was used for simulating the solidification process of the PCM inside the capsules. The effects of the capsule diameter and shell thickness and the void fraction on the performance of the heat storage system were also investigated. Results shown include the variation of the outlet water temperature of the storage tank with time, the temperature and heat release distributions of the PCM along the flow direction in the tank at different times, etc. A plate heat exchanger was used as a heat storage tank for experimental study. FNP-0090 was filled into the channels (the space between two plates) of one side of the heat exchanger and water flowed in the channels of the other side of the heat exchanger. The effect of flow rate and initial temperature on the outlet fluid temperature and heat release was investigated. The numerical results and the experimental data agreed within 10%.
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deBock, Peter, Rinaldo Miorini, Cathleen Hoel, Darin Sharar, and Bryan Whalen. "Experimental Characterization of Heat Transfer and Thermal Energy Storage Capability Using Swirling Two-Phase Flow in the Package Integrated Cyclone COoler (PICCO)." In ASME 2020 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipack2020-2606.

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Abstract The increasing demand for high power density wide-bandgap power electronics has propelled heat transfer research leading to a constant increase in the thermal performance of cold plates and heat sinks. Most of this research has focused on reducing thermal resistance of the package which can have a detrimental effect on transient thermal performance if thermal capacitance is reduced. In order to provide both a low thermal resistance and a higher thermal capacitance integrated into the package and near the thermal junction, a new cold plate called the Package Integrated Cyclone COoler (PICCO) was developed. GE Research and the US Army Research Lab collaborated to explore and validate the potential of this concept. The PICCO coldplate, which is enabled by 3D printing, establishes a swirling coolant flow field to remove heat. The swirling flow is anticipated to significantly aid in vapor removal from the surface and hence allow for the fluid to provide thermal capacitance through two-phase heat transfer efficiently. This paper describes the experiment design and development for thermal storage and cooling performance characterization of PICCO. The test rig includes a high-pressure capability gear pump moving fluid first through a Coriolis flowmeter and then through PICCO, where the fluid is accelerated in the cyclone and heated by miniaturized ceramic heaters, simulating SiC power electronics. The coolant releases the accumulated enthalpy to a plate-fin heat exchanger that is connected to a chiller. Several absolute and differential pressure transducers and thermocouples monitor the state of FC-72. The experiments will provide empirical transfer functions characterizing the PICCO pressure drop, heat transfer coefficient, critical heat flux and thermal energy storage capability.
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Zhao, Weihuan, Ali F. Elmozughi, Sudhakar Neti, and Alparslan Oztekin. "Transient 2-D Heat Transfer Analysis of Encapsulated Phase Change Materials for Thermal Energy Storage." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-86797.

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Solar energy is receiving a lot of attention since it is a clean, renewable, and sustainable energy. A major limitation however is that it is available for only about 2,000 hours a year in many places and thus it is essential to find ways to store solar thermal energy for the off hours. The present work deals with heat transfer aspects of storing solar thermal energy in high temperature phase change materials with melting points above 300 °C. Two-dimension transient heat transfer analysis is conducted to investigate thermal energy storage using encapsulated phase change material (EPCM) for concentrated solar power (CSP) applications. Sodium nitrate, NaNO3, is considered as the phase change material (PCM) encapsulated by stainless steel in a cylindrical shaped capsule. Stream function-vorticity formulation is employed to study the effect of buoyancy-driven convection in the molten salt on the total charging and discharging times for various sizes of PCM capsulated. Simulations are also conducted for a horizontally placed rod inside a flow channel. Storage times are calculated for laminar and turbulent flows of heat transfer fluids transferring heat into EPCM. It is shown that the buoyancy-driven convection in the molten PCM enhances internal heat transfer inside the capsule and hence helps to slightly shorten the total heat transfer times during both charging and discharging processes. Flow characteristics of the heat transfer fluid have profound effect on the nature of phase change process inside the EPCM rod.
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Zhang, Peng, Zhiwei Ma, and Ruzhu Wang. "Forced Flow and Convective Heat Transfer of Phase Change Material Slurry in the Heat Exchangers." In 2010 14th International Heat Transfer Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/ihtc14-22184.

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The application of phase change material slurry to the refrigeration and air conditioning system opens a new way for energy saving and reduction of the quantity of refrigerant in the system, because it can serve as both the energy storage and transportation media in the secondary loop which is responsible for distributing the cooling power. In the present study, the experimental investigations of the forced flow and heat transfer characteristics of Tetrabutylammonium Bromide (TBAB in abbreviation) clathrate hydrate slurry (CHS) in both the plate heat exchanger (PHE) and double-tube heat exchanger (DHE) are carried out. It is found out that the pressure drop in the PHE is about 5–50 kPa at the flow rate of 2–14 L/min and is about 2–30 kPa at the flow rate of 3–14 L/min, which is nearly 2 times of that of the chilled water. The overall heat transfer coefficient is in the range of 2500–5000 W/(m2K) for TBAB CHS in the PHE and is about 1500–3500 W/(m2K) in the DHE, which are both higher than that of TBAB aqueous solution flow because of the involvement of the phase change of TBAB CHS.
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Rasouli, Erfan, and Vinod Narayanan. "Single-Phase Cryogenic Flows Through Microchannel Heat Sinks." In ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels collocated with the ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/icnmm2014-21275.

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Cryogenic fluids are used widely in several thermal management applications such as in regenerative cooling of rocket engine combustor liners, missile warning receivers, satellite tracking systems and cryo-adsorbent hydrogen storage systems. Single phase laminar flow and heat transfer rate of liquid nitrogen in microchannels is studied experimentally in this paper. The performance of two distinct geometries of microchannel heat sinks are evaluated and compared for simultaneous developing laminar flow in the Reynolds number range from 180 to 610. The first geometry pertains to parallel microchannels while the second corresponds to a staggered microscale pin fin array. Two parallel microchannel geometries having identical widths of 140μm and identical laminar thermal resistances but with different aspect ratios of 4.7 and 7.6 are compared. The pin fin heat sink consisted of square pins of 395μm side and oriented at 45 degrees to the flow. All three heat sinks have identical heat source surface area. Results are presented in a non-dimensional form in terms of the friction factor, Nusselt, Reynolds numbers and compared with the predictions of existing correlations in the literature for parallel microchannels and micro pin fin heat sinks.
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Ghadge, Dhanashree S., and Vijay Chatoorgoon. "Analytical Study of Supercritical Water Flow in Two Heated Parallel Channels With Wall Heat Effects." In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-81150.

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One dimensional (1D) numerical simulations have been carried out of heated parallel channel experiments using the linear frequency domain approach to investigate the effect of wall heat on the system’s stability for supercritical water in vertical heated channels. Oscillatory instability boundaries of the experimental cases with two different wall thicknesses and uniform power distribution are produced, assessed and discussed. These new numerical results with wall heat are compared with experimental data and previous numerical results without wall heat. There is improved agreement on the stability boundary predictions when the wall heat storage effect is included. However, the effect of wall heat storage was small for these experiments.
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Miorini, Rinaldo L., Darin J. Sharar, and Peter deBock. "Thermal Model of the Package Integrated Cyclone COoler (PICCO): Achieving High Thermal Conductance Using Swirled Two-Phase Flow." In ASME 2020 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/ipack2020-2605.

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Abstract The demand for high power density, therefore high heat dissipation, power electronics modules is propelled by applications such as hybrid transportation and asynchronous power generation, among others. Besides a low thermal resistance, these applications require high thermal capacitance to manage transient operations. The Package Integrated Cyclone COoler (PICCO) is an additively manufactured, thermal energy storing cooler codesigned by GE Research (GRC) in collaboration with the US Army Research Lab (ARL). The key aspect of PICCO is its capability to swirl a two-phase coolant, i.e. liquid-gas. The centrifugal field creates a radial pressure gradient inducing buoyancy. The strong radial acceleration to which the fluid is subject forces relatively cold flow outward to reach the hot wall, thus boosting the heat transfer, while hot flow and bubbles migrate inward and the two-phase system is nearly isothermal (thermal storage). The proposed study models the swirled flow in terms of liquid film heat conductance and critical heat flux predictions. The resulting heat transfer coefficient can be applied to the walls of the cyclone and used as a boundary condition for the heat conduction problem through the cyclone wall and the module layers.
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Reports on the topic "Heat storage Two-phase flow"

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Abdollahian, D., and S. Levy. A Two-Phase Flow and Heat Transfer Model for Zero Gravity. Fort Belvoir, VA: Defense Technical Information Center, May 1985. http://dx.doi.org/10.21236/ada156097.

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Paul Cizmas. A REDUCED ORDER MODEL OF TWO-PHASE FLOW, HEAT TRANSFER AND COMBUSTION IN CIRCULATING FLUIDIZED-BEDS. Office of Scientific and Technical Information (OSTI), December 2003. http://dx.doi.org/10.2172/827038.

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Paul Cizmas. A REDUCED ORDER MODEL OF TWO-PHASE FLOW, HEAT TRANSFER AND COMBUSTION IN CIRCULATING FLUIDIZED-BEDS. Office of Scientific and Technical Information (OSTI), December 2002. http://dx.doi.org/10.2172/813624.

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Cizmas, Paul, and Antonio Palacios. A REDUCED ORDER MODEL OF TWO-PHASE FLOW, HEAT TRANSFER AND COMBUSTION IN CIRCULATING FLUIDIZED-BEDS. Office of Scientific and Technical Information (OSTI), December 2001. http://dx.doi.org/10.2172/792073.

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Doughty, C., and K. Pruess. Continued development of a semianalytical solution for two-phase fluid and heat flow in a porous medium. Office of Scientific and Technical Information (OSTI), June 1991. http://dx.doi.org/10.2172/138331.

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Tentner, Adrian, Prasad Vegendla, Dillon Shaver, Ananias Tomboulides, Aleks Obabko, and Elia Merzari. Development and validation of two-phase flow models and critical heat flux prediction for the highly-scalable CFD code NEK-2P. Office of Scientific and Technical Information (OSTI), September 2018. http://dx.doi.org/10.2172/1483961.

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Yu, W., D. M. France, and J. L. Routbort. Pressure drop, heat transfer, critical heat flux, and flow stability of two-phase flow boiling of water and ethylene glycol/water mixtures - final report for project "Efficent cooling in engines with nucleate boiling.". Office of Scientific and Technical Information (OSTI), January 2011. http://dx.doi.org/10.2172/1009796.

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