Relevant bibliographies by topics / Confined Boiling

Academic literature on the topic 'Confined Boiling'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

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Journal articles on the topic "Confined Boiling"

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de Brún, C., R. Jenkins, T. L. Lupton, R. Lupoi, R. Kempers, and A. J. Robinson. "Confined jet array impingement boiling." Experimental Thermal and Fluid Science 86 (September 2017): 224–34. http://dx.doi.org/10.1016/j.expthermflusci.2017.04.002.

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Passos, J. C., E. L. da Silva, and L. F. B. Possamai. "Visualization of FC72 confined nucleate boiling." Experimental Thermal and Fluid Science 30, no. 1 (October 2005): 1–7. http://dx.doi.org/10.1016/j.expthermflusci.2005.01.008.

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LEE, MAW TIEN, YU MIN YANG, and JER RU MAA. "NUCLEATE POOL BOILING IN A CONFINED SPACE." Chemical Engineering Communications 117, no. 1 (September 1992): 205–17. http://dx.doi.org/10.1080/00986449208936067.

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Consolini, Lorenzo, Gherhardt Ribatski, John R. Thome, Wei Zhang, and Jinliang Xu. "Heat Transfer in Confined Forced-Flow Boiling." Heat Transfer Engineering 28, no. 10 (October 2007): 826–33. http://dx.doi.org/10.1080/01457630701378226.

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Rops, C. M., R. Lindken, J. F. M. Velthuis, and J. Westerweel. "Enhanced heat transfer in confined pool boiling." International Journal of Heat and Fluid Flow 30, no. 4 (August 2009): 751–60. http://dx.doi.org/10.1016/j.ijheatfluidflow.2009.03.007.

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Sun, Chen-li, and Van P. Carey. "Effects of Gap Geometry and Gravity on Boiling Around a Constrained Bubble in 2-Propanol/Water Mixtures." Journal of Heat Transfer 129, no. 2 (May 15, 2006): 114–23. http://dx.doi.org/10.1115/1.2402178.

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In this study, boiling experiments were conducted with 2-propanol/water mixtures in confined gap geometry under various levels of gravity. The temperature field created within the parallel plate gap resulted in evaporation over the portion of the vapor-liquid interface of the bubble near the heated surface, and condensation near the cold surface. Full boiling curves were obtained and two boiling regimes—nucleate boiling and pseudofilm boiling—and the transition condition, the critical heat flux (CHF), were identified. The observations indicated that the presence of the gap geometry pushed the nucleate boiling regime to a lower superheated temperature range, resulting in correspondingly lower heat flux. With further increases of wall superheat, the vapor generated by the boiling process was trapped in the gap to blanket the heated surface. This caused premature occurrence of CHF conditions and deterioration of heat transfer in the pseudo-film boiling regime. The influence of the confined space was particularly significant when greater Marangoni forces were present under reduced gravity conditions. The CHF value of x (molar fraction)=0.025, which corresponded to weaker Marangoni forces, was found to be greater than that of x=0.015 with a 6.4mm gap.
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Yin, Liaofei, and Li Jia. "Confined characteristics of bubble during boiling in microchannel." Experimental Thermal and Fluid Science 74 (June 2016): 247–56. http://dx.doi.org/10.1016/j.expthermflusci.2015.12.016.

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Shi, Yang, Qingyang Wang, Jian Zeng, Yingxue Yao, and Renkun Chen. "Boiling with ultralow superheat using confined liquid film." Applied Thermal Engineering 184 (February 2021): 116356. http://dx.doi.org/10.1016/j.applthermaleng.2020.116356.

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Shi, Yang, and Yingxue Yao. "Heat Transfer Performance Prediction of Confined Thin Film Boiling." Journal of Physics: Conference Series 2022, no. 1 (September 1, 2021): 012024. http://dx.doi.org/10.1088/1742-6596/2022/1/012024.

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Cardoso, Elaine Maria, and Júlio César Passos. "Nucleate Boiling ofn-Pentane in a Horizontal Confined Space." Heat Transfer Engineering 34, no. 5-6 (January 2013): 470–78. http://dx.doi.org/10.1080/01457632.2012.722438.

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Dissertations / Theses on the topic "Confined Boiling"

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Sridhar, Abishek. "Single phase and boiling heat transfer under steady and pulsating confined jet impingement." Thesis, Curtin University, 2013. http://hdl.handle.net/20.500.11937/2570.

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Computational and experimental investigations are carried out on steady and pulsating jet impingement heat transfer. The studies focus on the fundamental investigation of heat transfer with and without boiling phenomena, applicable in the area of electronic cooling. The novelty of the research is the exploration of the relative significance of the contributing fluid and heat transport mechanisms under different parametric conditions.
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Nunes, Jéssica Martha. "Análise experimental da ebulição nucleada em superfícies nanoestruturadas sob condições de confinamento." Ilha Solteira, 2018. http://hdl.handle.net/11449/157255.

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Orientador: Elaine Maria Cardoso
Resumo: A intensificação da transferência de calor por meio de alterações na morfologia da superfície aquecida vem sendo estudada no meio científico, a fim de suprir a crescente demanda de resfriamento de dispositivos com alta capacidade de processamento e dimensões cada vez menores. O presente trabalho apresenta o estudo experimental do efeito de superfícies nanoestruturadas e do espaçamento do canal de confinamento durante a ebulição em piscina da água deionizada, à temperatura de saturação na pressão atmosférica, sobre o coeficiente de transferência de calor, HTC, e fluxo crítico de calor, CHF. As superfícies nanoestruturadas foram obtidas pelo processo de ebulição do nanofluido de Al2O3-água deionizada em duas diferentes concentrações más-sicas: 0,03 g/l (“baixa” concentração, LC) e 0,3 g/l (“alta” concentração, HC). Foram realizados testes livres, com espaçamento, entre a superfície aquecida e a superfície adiabática, de 30 mm (correspondendo a Bo = 12), e testes sob condições de confinamento, com espaçamento de 1,0 mm (Bo = 0,4). As superfícies de teste foram caracterizadas por meio de medição da rugosidade média (Ra), do ângulo de contato estático (molhabilidade), e imagens MEV. Foi observado um aumento médio de 45% no HTC do teste com superfície lisa nanoestruturada em baixa concentração de nanofluido, em relação à superfície lisa sem deposição. Esse ganho está relacionado com o aumento do número de sítios ativos de nucleação causado pela deposição das nanopartículas sobre a ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The intensification of heat transfer through changes in the heated surface morphology has been studied in the scientific community to meet the increase demand for cooling of devices with high processing power and smaller dimensions. This work presents the experimental study of the effect of nanocoated surfaces and gap size during nucleated boiling of deionized water, in saturation temperature at atmospheric pressure, about heat transfer coefficient, HTC, and critical heat flux, CHF. The pool boiling process of Al2O3-water based nanofluid at two different mass concentrations: 0.03 g/l (“low” concentration, LC) and 0.3 g/l (“high” concentration, HC), produced nanostructured surfaces. Unconfined tests were analyzed, with gap size between the heated surface and the adiabatic surface of 30 mm (corresponding to Bo = 12), and tests under confinement conditions, with gap size of 1.0 mm (Bo = 0.4). The tested surfaces were characterized by means of surface roughness (Ra) measurement, static contact angle (wettability), and SEM images. An average increase of 45% in HTC of the test with nanocoated smooth surface in low nanofluid concentration was observed in relation to smooth surface without deposition. This enhancement is related to the increase in the number of active nucleation sites caused by the nanoparticle’s deposition on the smooth surface. For all tests with rough nanocoated surfaces and nanocoated smooth one with high nanofluid concentration, there was degradation of the HTC ... (Complete abstract click electronic access below)
Mestre
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Deng, Sin-Hong, and 鄧信宏. "A study of convective boiling heat transfer of a micro-fin chip cooler in a confined space." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/69wg5p.

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碩士
國立臺北科技大學
能源與冷凍空調工程系碩士班
105
In this study, flow boiling experiment is tested with di-electric fluid, FC-72, which flow through a 14 mm by 14 mm square heated area in a square channel having variable space. Cubic fins of 0.2 mm in both height and width were made on the copper plate with 0.2 mm fin gap. The internal space of the test section is either 1/4, 1/2, or 3/4 covered. The experimental results showed that the single phase convetion heat transfer performane increased the ratio of covered area as a result of increased flow velocity above the heated surface under a confined space of 1.0mm channel height. For two phase convection with boiling, the heat transfer coefficient increased with the cover-ratio at 500 and 800 ml/min. However,insignificant effect on cover-ratio was found at 200 ml/min because the dominat heat transfer mechanism is boiling. Observation of flow phenomena showed that the bubble size reduced as the flow velocity increased with increasing cover- ratio.
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He, Xiaoliang. "CFD simulation of single-phase and flow boiling in confined jet impingement with in-situ vapor extraction using two kinds of multiphase models." Thesis, 2013. http://hdl.handle.net/1957/36138.

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With continued development of the electronic industry, the demand for highly efficient heat removal solutions requires innovative cooling technologies. A computational fluid dynamic (CFD) study, including heat transfer, is performed for an axisymmetric, confined jet impingement experiencing boiling and coupled with vapor extraction. Boiling occurs at the target surface while extraction occurs at the wall confining the radial flow. The region between the target and confining wall is defined as a confined gap. Extraction is employed to enhance heat transfer and to minimize the potential negative influence of flow instabilities resulting from two-phase flow within a confined region. A three-dimensional sector of the confined jet is employed in the simulation. A single circular impinging jet with a constant jet diameter (4 mm) and variable gap height (0.5, 1.0 and 1.5 mm), also known as nozzle-to-target spacing, is considered. The effect of mass flux at the confined gap entrance is also investigated (200, 400 and 800 kg/m²-s) for a range of heat flux (5 to 50 W/cm²). Fluid flow and heat transfer are simulated using the Volume of Fluid (VOF) model and the wall-boiling sub-model within the Multiphase Segregated Flow (MSF) model. The boiling sub-model in the VOF model applies the Rohsenow boiling correlation, while in the MSF model, the Kurul-Podowski boiling sub-model is used. Also, vapor extraction is realized by different mechanisms for these two models. For the VOF model, a specific phase "wall porosity" can be assigned to a wall to make it porous. Over a range of pressure differentials across this porous wall such that the inertial transport influence is negligible, vapor transport should agree with Darcy's law. For the MSF model, a wall can be made permeability to one substance or phase while remaining impermeable to the other substance or phase. However, a portion of the substance or phase reaching the boundary allowed to pass through the surface must be specified. A pressure drop cannot be applied across the wall, thereby prohibiting Darcy flow modeling. The solutions of both models are at steady state. The boiling curves without vapor extraction from both models are provided and compared to experiments. Simulations matching experimental wall temperatures under-predict theoretical vapor generation and those matching vapor generation over-estimate wall superheat. For cases with no extraction, local temperature and velocity profiles from the VOF model are provided at several radial locations within the confined gap. Scalar temperature and pressure distributions and velocity vectors are presented to explain observations in profiles.
Graduation date: 2013
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Books on the topic "Confined Boiling"

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Abbassi, Abbas. Transition and film boiling in confined geometries. Birmingham: University of Birmingham, 1989.

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Book chapters on the topic "Confined Boiling"

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Hansen, Eddy W., Ralf Schmidt, and Michael Stöcker. "Boiling-point elevation of water confined in mesoporous MCM-41 materials probed by 1H NMR." In Studies in Surface Science and Catalysis, 543–50. Elsevier, 1997. http://dx.doi.org/10.1016/s0167-2991(97)80599-x.

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Chul Cha, Sung, Kyoung Il Moon, and Hae Won Yoon. "Current Development of Automotive Powertrain Components for Low Friction and Wear Reduction through Coating and Heat Treatment Technology." In Lubrication - Thermal Management and Friction Reduction [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106032.

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Recent findings of R&D for powertrain components concerning friction and wear reduction are described in this chapter. These are realized through lubrication technology of coating and heat treatment, which are fit for this book. In the first part, nano-complex coatings for parts of future mobility are presented with their friction and wear behavior. The application of an alloying target was proposed to promote the commercial use of nanocomposite coatings. In the second part, the importance on pre-treatments-related silicon oxide-diamond-like carbon (SiO-DLC) coating for the smallest part of fuel system is described. The optimization of cleaning for the balls before coating was resulted: The best cleaning performance presented the addition of acetone cleaning, water boiling, and then acetone cleaning, confirmed by fluorescence analyzers. The third part of this work was developing low-temperature vacuum carburizing and pre-treatment for parts of injector, stopper (SUS303), and position ring (1.4305) with high wear resistance. The difference between two steels led to the result: high molybdenum of 1.4305 formed Mo-oxides on the surface during acid etching. These Mo-oxides resolved quickly by hydrogen during carburizing and then enabled activated carburizing. The 1.4305 was appropriate for the carburizing and was chosen for stopper.
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G. Zenkevich, Igor. "Features and New Examples of Gas Chromatographic Separation of Thermally Unstable Analytes." In Recent Advances in Gas Chromatography [Working Title]. IntechOpen, 2020. http://dx.doi.org/10.5772/intechopen.94229.

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The processes of thermal decomposition of analytes in gas chromatographic (GC) columns are classified and two new examples of them are considered in details. First of them is monomolecular decomposition of monoalkyl esters of benzene-1, 2-dicarboxylic (phthalic) acid (monoalkyl phthalates). This process has the analogy in chemical reactions in solutions and it may be responsible for the toxicity of phthalates. The second example is decomposition of non-substituted hydrazones of both aliphatic and aromatic carbonyl compounds. The analytes of the second sub-group present the first example of bimolecular (second order) decomposition in a GC column: two molecules of hydrazones form stable azines and hydrazine. Besides that this process presents the particular interest, because it is accompanied by secondary chemical reactions not in an injector, but within GC column, when a by-product of decomposition is involved into secondary interaction with other constituents of the samples. It was confirmed, that visual images of all these decomposition processes on the chromatograms are rather identical and coincide with the manifestations of interconversion of isomers or tautomers. The most often expressed features of chromatographic profiles in such cases are the presence of peaks of an initial analyte and a product of its decomposition or isomerization, connected with more or less expressed diffused “plateau” or “train” between them. The decomposition processes during sample preparation prior to chromatographic separation or in the heated injector of GC instrument are not accompanied by such features. Despite of the rather “exotic” character of the examples considered, the knowledge of them seems to be useful for better revealing the analogous situations in chromatographic practice. Thermal instability of analytes is the principal restriction of GC separation of reactive compounds and we cannot eliminate it for objective reasons. However, in some cases we can evaluate the temperature limits of chromatographic columns, which should not be exceeded during GC separation of instable compounds. The simplest (low boiling) homologs of thermally unstable compounds are often characterized by “normal” boiling point at atmospheric pressure (T b, °C) without decomposition, that means the possibility of their GC analysis unambiguously. Therefore, we can select such T b values as GC and/or GC–MS temperature limit (T lim) for other members of series of thermally unstable homologs. If GC separation is carried out not in isothermal, but in temperature programming conditions, so-called retention temperature (T R) of unstable analytes should not exceed the evaluated T lim value.
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Conference papers on the topic "Confined Boiling"

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Kew, P. A., E. Adom, and K. Cornwell. "HEAT FLUX CONTROLLED BOILING IN CONFINED SPACES." In Annals of the Assembly for International Heat Transfer Conference 13. Begell House Inc., 2006. http://dx.doi.org/10.1615/ihtc13.p28.480.

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Eason, Nathan C., Jeffrey G. Marchetta, and William S. Janna. "EXPERIMENTAL STUDY OF CONFINED POOL BOILING HEAT TRANSFER." In 5-6th Thermal and Fluids Engineering Conference (TFEC). Connecticut: Begellhouse, 2021. http://dx.doi.org/10.1615/tfec2021.boi.036258.

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Hetsroni, G. "Boiling of Water and Surfactants in Confined Space." In ASME 2008 9th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2008. http://dx.doi.org/10.1115/esda2008-59216.

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Natural convection boiling of water and surfactant solutions at atmospheric pressure in narrow horizontal annular channels was studied experimentally. The Alkyl (8–16) Glucoside with molecular weight of 390 g/mol was used in the experiments. It is a nonionic surfactant with negligible environmental impact. The length of the horizontal channels was 24 mm and 36 mm, the gape size was in the range of 0.45–3.7 mm, the heat flux was in the range of 20–500 kW/m2, the concentration of surfactant solutions was varied from 10 to 600 ppm. The gap size of the vertical channels was changed in the range of 1–80 mm. The flow pattern was visualized by high-speed video recording to identify the different regimes of boiling of water and surfactant solutions with different concentrations. At heat flux q<100 kW/m2 the rapid growth of elongated bubble was observed in the water. The rapid bubble growth pushes the liquid-vapor interface on both open sides of the channel. When a bubble departs from a nucleus cavity, its cavity is then recovered by liquid, and next bubble will appear on the heated tube after a certain interval. The behavior of the long vapor bubbles occurring in small size annular channels is not similar to annular flow with intermitted slugs between two vapor trains. Surfactant solution promotes activation of nucleation sites in a clustered mode. The cluster contains a number of small bubbles, the location of nucleation sites and time behavior of each bubble cannot be traced exactly. At higher values of heat flux coalescence process was observed during boiling of water and surfactant solutions. For water boiling in horizontal channels at Bond numbers Bo<1 the CHF in restricted space is lower than that in unconfined apace. This effect increases with increasing the channel length. For water at Bond number Bo = 1.52, boiling can be considered as unconfined. Additive of surfactant led to enhancement of heat transfer compared to water boiling in the same gap size, however, this effect decreased with decreasing gap size. For the same gap size, CHF in surfactant solutions was significantly lower than that in water. Hysteresis was observed for boiling in degraded surfactant solutions.
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Cardoso, Elaine Maria, and Roberto de Almeida Andrade. "PARAMETRIC ANALYSIS OF CONFINED AND UNCONFINED NUCLEATE BOILING." In Proceedings of CONV-14: International Symposium on Convective Heat and Mass Transfer. June 8 - 13, 2014, Kusadasi, Turkey. Connecticut: Begellhouse, 2014. http://dx.doi.org/10.1615/ichmt.2014.intsympconvheatmasstransf.740.

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Kew, Peter A., and Keith Cornwell. "CONFINED BUBBLE FLOW AND BOILING IN NARROW SPACES." In International Heat Transfer Conference 10. Connecticut: Begellhouse, 1994. http://dx.doi.org/10.1615/ihtc10.1310.

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Martha Nunes, Jessica, Reinaldo Rodrigues de Souza, and Elaine Maria Cardoso. "BOILING HEAT TRANSFER BEHAVIOR FOR NANOCOATED SURFACES UNDER CONFINED CONDITIONS." In Brazilian Congress of Thermal Sciences and Engineering. ABCM, 2018. http://dx.doi.org/10.26678/abcm.encit2018.cit18-0497.

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Abishek, S., R. Narayanaswamy, and V. Narayanan. "Effect of Heater Size on Confined Subcooled Jet Impingement Boiling." In ASME 2012 Heat Transfer Summer Conference collocated with the ASME 2012 Fluids Engineering Division Summer Meeting and the ASME 2012 10th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/ht2012-58205.

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Jet impingement boiling heat transfer is a potential technique for the removal of very high heat fluxes concentrated at discrete locations, such as in power electronic components. In the present research, the effect of heater-nozzle size ratio (in the range 0.5 ≤ wH/wN ≤ 11) on jet impingement boiling is studied numerically. A steady-state submerged and confined subcooled jet impingement boiling of de-ionized and degassed water (at atmospheric pressure) on a polished isothermal heater surface is considered for a jet Reynolds number of Rew = 2500 and 20°C subcooling. The RPI wall boiling closure is used for the partition of heat flux on the surface into liquid phase, evaporation and quenching. Turbulence is modeled using the RNG-k-ε mixture model. The flow and heat transfer is simulated by considering the liquid and vapor phase to be an Euler-Euler interpenetrating continua; the interfacial momentum transfer is modelled using appropriate correlations for interphase momentum, heat and mass transfers. Validation of the numerical approach was performed by comparison of the present results with experimental data from literature for axisymmetric as well as slot jets. It was found that for any prescribed wall superheat, the heat flux was consistently larger for relatively smaller heaters (or smaller wH/wN). However, for any given wall superheat, the heat flux stagnated at an apparent asymptotic limit with increase in heater size, and this asymptotic limit was larger for larger wall superheats. It was also found that the quenching heat flux was the largest contributor to the total heat flux at relatively large degrees of superheat irrespective of heater-nozzle size ratio. A correlation is also developed for the heat flux as a function of the heater size and degree of superheat, for a given set of other controlling parameters.
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Manetti, Leonardo, Elaine Maria Cardoso, and Jessica Martha Nunes. "EXPERIMENTAL ANALYSIS OF NUCLEATE BOILING ON NANOSTRUCTURED SURFACES UNDER CONFINED CONDITIONS." In 24th ABCM International Congress of Mechanical Engineering. ABCM, 2017. http://dx.doi.org/10.26678/abcm.cobem2017.cob17-1909.

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Yang, Chien-Yuh, and Chien-Fu Liu. "Visualization of Boiling Heat Transfer on Micro Porous Coated Surface in Confined Space." In ASME 2013 11th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/icnmm2013-73175.

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Numerous researches have been developed for pool boiling on microporous coated surface in the past decade. The nucleate boiling heat transfer was found to be increased by up to 4.5 times than that on uncoated surface. Recently, the two-phase micro heat exchangers have been considered for high flux electronic devices cooling. The enhancement techniques for improving the nucleate boiling heat transfer performance in the micro heat exchangers have gotten more importance. Previous studies of microporous coatings, however, have been restricted to boiling in unconfined space. No studies have been made on the feasibility of using microporous coatings for enhancing boiling in confined spaces. This study provides an experimental observation of the vapor generation and leaving processes on microporous coatings surface in a 1-mm confined space. It would be helpful for understanding the mechanism of boiling heat transfer and improving the design of two-phase micro heat exchangers. Aluminum particles of average diameter 20 μm were mixed with a binder and a carrier to develop a 150 μm thickness boiling enhancement paint on a 3.0 cm by 3.0 cm copper heating surface. The heating surface was covered by a thin glass plate with a 1 mm spacer to form a 1 mm vertical narrow space for the test section. The boiling phenomenon was recorded by a high speed camera. In addition to the three boiling regimes observed by Bonjour and Lallemand [1], i.e., isolated deformed bubbles, coalesced bubbles and partial dryout at low, moderate and high heat fluxes respectively in unconfined space, a suction and blowing process was observed at the highest heat flux condition. Owing to the space confinement, liquid was sucked and vapor was expelled periodically during the bubble generation process. This mechanism significantly enhanced the boiling heat transfer performance in confined space.
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Yang, Yu-Min, Chao-Yang Lin, Ming-Huei Liu, and Jer-Ru Maa. "Pool boiling heat transfer of binary refrigerant mixtures in a confined space." In International Heat Transfer Conference 12. Connecticut: Begellhouse, 2002. http://dx.doi.org/10.1615/ihtc12.4600.

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