Relevant bibliographies by topics / Mass Transfer Correlation

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

Academic literature on the topic 'Mass Transfer Correlation'

Author: Grafiati
Published: 4 June 2021
Last updated: 11 February 2022

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Journal articles on the topic "Mass Transfer Correlation"

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Aliwarga, Lienda. "Investigating Mass Transfer Phenomena in Batch Solvent Extraction of Rice Bran Oil." Reaktor 19, no. 1 (May 10, 2019): 1–10. http://dx.doi.org/10.14710/reaktor.19.1.1-10.

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In this study, we will point out the correlation of critical parameters in designing scale-up of process equipment for commercial rice bran oil extraction with different types of rice paddy, solvent, and physicochemical condition. Advantageously, this research was also intended to enhance the discoveries of novel sustainable production method for resilient agro-based food, energy, and chemical industries. In our experiment, the extraction of rice bran oil was organised in a batch agitated vessel and showed a profile of first order system. The most important factors which profoundly contributed towards the yield of rice bran oil from Saigon I and PadiBesar variety are temperature (T), impeller speed (N), ratio of bran to solvent (s/L), and ratio of impeller’s height-off bottom to tank diameter (h/d). For the mass transfer constant and the rate of extraction as consequence, factors that significantly influenced the correlation were temperature (T), impeller speed (N), ratio of impeller diameter to tank diameter (d/D), and ratio of impeller’s height-off bottom to tank diameter (h/d). For the dimensionless yield, generalised equation is provided with coefficient of determination 0.95, while that of the mass transfer equals to 0.63, reflecting the yield correlation to be more accurate in predicting further experimental results. These correlations are furthermore unique for different rice varieties, of which in this case belongs to Saigon I. Application for other rice species is relevant as by inserting additional correction factor which also exemplified in this research for PadiBesar. Keywords: rice bran oil; batch extraction; storage time; mass transfer, rate, yield
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Tae Kang, Yong, T. Nagano, and Takao Kashiwagi. "Mass transfer correlation of NH3–H2O bubble absorption." International Journal of Refrigeration 25, no. 7 (November 2002): 878–86. http://dx.doi.org/10.1016/s0140-7007(01)00096-2.

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Earl, David J., Harlan J. Kragt, Christopher W. Macosko, and Henry S. White. "Mass-transfer correlation for flow over cylindrical microelectrodes." Industrial & Engineering Chemistry Research 30, no. 1 (January 1991): 264–67. http://dx.doi.org/10.1021/ie00049a041.

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Tanda, Tsubsa, Koichi Shirai, Yukihiko Matsumura, and Hiroyuki Kitahara. "New Correlation for Mass Transfer Characteristics of Spray Column." Industrial & Engineering Chemistry Research 50, no. 23 (December 7, 2011): 13554–60. http://dx.doi.org/10.1021/ie200989k.

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Young, Thomas C., and Warren E. Stewart. "Concise correlation of sieve-tray heat and mass transfer." AIChE Journal 41, no. 5 (May 1995): 1319–20. http://dx.doi.org/10.1002/aic.690410526.

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Shi, John, Xiaoqin Zhou, and Lamin S. Kassama. "Correlation of Mass Transfer Coefficients in Supercritical CO2Separation Process." Drying Technology 25, no. 2 (February 2007): 335–39. http://dx.doi.org/10.1080/07373930601119953.

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Wei, Hui Ming, Xuan Zhang, and Tai Li Liu. "Heat Transfer Correlation in Small Channels." Advanced Materials Research 516-517 (May 2012): 308–11. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.308.

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In this study, a study on heat transfer is performed for water upward flow in small channels to provide a systematic database for low pressure and mass flow velocity conditions. An empirical correlation on heat transfer in small channels for predicting the average Nusselt number has been derived by using Genetic Algorithm (GA).
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Djebbar, Y., and R. M. Narbaitz. "Improved onda correlations for mass transfer in packed towers." Water Science and Technology 38, no. 6 (September 1, 1998): 295–302. http://dx.doi.org/10.2166/wst.1998.0264.

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A comprehensive database for VOC stripping in packed towers was gathered from 15 field and pilot-scale studies. This database is used to develop a new correlation based on the Onda model. The development of this new correlation addressed the shortcomings of the Onda correlation which were identified in previous studies. The average error in the new correlation was less than 26% for both the development and the validation data.
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Giacobbo, Alexandre, Elisa Veridiani Soares, Andréa Moura Bernardes, Maria João Rosa, and Maria Norberta de Pinho. "Atenolol removal by nanofiltration: a case-specific mass transfer correlation." Water Science and Technology 81, no. 2 (January 15, 2020): 210–16. http://dx.doi.org/10.2166/wst.2020.073.

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Abstract Concentration polarization is a phenomenon inherent to membrane separation operations and as a precursor of membrane fouling is frequently related to the decrease in the performance of these operations. In the present work, a case-specific mass transfer correlation was developed to assess the concentration polarization when nanofiltration, in different operating conditions, was applied to treat a pharmaceutical wastewater containing atenolol. NF runs with two membranes, two atenolol concentrations and three feed circulating velocities were conducted, and the corresponding experimental mass transfer coefficients were determined using film theory to describe the concentration polarization phenomenon. Higher velocities led to higher mass transfer coefficients and, consequently, lower concentration polarization. These mass transfer coefficients were correlated with the circulating velocity (Re), the solute diffusivity (Sc) and the membrane permeability (LP+) (the membrane is a permeable interface with effect on the concentration profiles developed from the interface towards the bulk feed), yielding the following correlation Sh = 1.98 × 104Re0.5Sc0.33LP+0.32. The good agreement between the calculated and the experimental results makes this correlation a valuable tool for water practitioners to predict and control the concentration polarization during atenolol-rich wastewater treatment by nanofiltration, thereby increasing its productivity and selectivity.
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Narbaitz, Roberto M., and Yassine Djebbar. "Nonparametric modeling of mass transfer coefficients for air stripping packed towers." Canadian Journal of Civil Engineering 23, no. 2 (April 1, 1996): 549–59. http://dx.doi.org/10.1139/l96-059.

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Existing parametric correlations have been found to have difficulties in predicting the removal of trace levels of volatile organic chemicals by modern air stripping towers. In this study, a new approach using a nonparametric kernel regression method was used to predict the mass transfer coefficient, KLa, of air stripping towers. Although only four variables were used, the predictions are already improved more than 50% as compared with Onda correlation, the best existing parametric correlation. The proposed technique shows a dependency of KLa on the liquid flow rate which is in good agreement with established theory. Previous parametric approaches were unable to model this relationship correctly. Key words: mass transfer coefficient, air stripping tower, volatile organic compound, nonparametric kernel regression.
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Dissertations / Theses on the topic "Mass Transfer Correlation"

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Leung, Susanna. "Biological Aerated Filters: Oxygen Transfer and Possible Biological Enhancement." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/76962.

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A submerged-media biological aerated filter (BAF) has been studied to 1) evaluate oxygen transfer kinetics under conditions without biological growth and 2) determine the influence of biological growth on the rate of oxygen transfer. Collectively, the study evaluates the rates of supply and consumption of oxygen in BAFs. The mass-transfer characteristics of a submerged-media BAF were initially determined over a wide range of gas and liquid flow rates without the presence of bacteria. The mass-transfer coefficients (KLa(T)) were measured using a nitrogen gas stripping method and were found to increase as both gas and liquid superficial velocities increase, with values ranging from approximately 40 to 380 h??. The effect of parameters including the gas and liquid velocities, dirty water to clean water ratio, and temperature dependence was successfully correlated within +/- 20% of the experimental KLa value. The effects of the media size and gas holdup fractions were also investigated. Stagnant gas holdup did not significantly influence the rate of oxygen transfer. Dynamic gas holdup and the difference between total and stagnant gas holdup were found to increase with an increase in gas velocity. Neither liquid velocity nor liquid temperature was determined to have a significant impact on gas holdup. A tertiary nitrification BAF pilot unit was then operated for 5 months downstream of a secondary treatment unit at a domestic wastewater treatment facility. The study investigated the oxygen transfer capabilities of the nitrifying unit with high oxygen demand requirements through a series of aeration process tests and explored the presence of oxygen transfer enhancements by further analyzing the actual transfer mechanism limitations. It was determined that (assuming OTE equals 20 percent) aerating the BAF pilot unit based on the stoichiometric aeration demand resulted in overaeration of the unit, especially at lower pollutant loading rates. Endogenous respiration contributed to only 2 to 7 percent of the total oxygen demand with regions of biomass activity changing with varying loading conditions. An enhanced oxygen transfer factor was determined in the biologically active pilot. Although it cannot be definitively concluded that the observed oxygen transfer factor is either due to biological activity or not simply an artifact of measurement/analysis techniques, the enhancement factor can be mathematically accounted for by either an increase in the KLa factor or the associated driving force using a proposed enhanced bubble theory.
Master of Science
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Hudjetz, Stefan. "Experimental investigation of heat exchange between thermal mass and room environments." Thesis, De Montfort University, 2012. http://hdl.handle.net/2086/9021.

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The different technologies of passive cooling concepts have to rely on a good thermal coupling between a building's thermal mass and indoor air. In many cases, the ceiling is the only surface remaining for a good coupling. Further research is necessary to investigate discrepancies between existing correlations. Therefore, the overall aim of the work described in this thesis is the investigation of heat transfer at a heated ceiling in an experimental chamber. Acoustic baffles obstruct the surface of the ceiling and impede heat transfer. However, there is nearly no published data about the effect of such baffles on heat transfer. Available results from simulations should be verified with an experimental investigation. Consequently, one of the primary aims of this work was to experimentally determine the influence of such acoustic baffles. A suitable experimental chamber has been built at Biberach University of Applied Sciences. The thesis describes the experimental chamber, the experimental programme as well as results from five different test series. With a value of ±0.1Wm⁻²K⁻¹ for larger temperature differences, uncertainty in resulting convective heat transfer coefficients for natural convection is comparable to that of results from an existing recent experimental work often recommended for use. Additionally, total heat transfer (by convection and radiation) results are presented. Results are given for natural, forced and mixed convection conditions at an unobstructed heated ceiling. Furthermore, results for acoustic baffles in both an unventilated and a ventilated chamber are shown. Natural convection results show a very good agreement with existing correlations. Under mixed convection conditions, convective heat transfer at an unobstructed ceiling decreases to the limiting case described by natural convection. Installation of acoustic baffles leads to a reduction in total heat transfer (convection and radiation) between 20% and 30% when compared to the case of an unobstructed ceiling.
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Semidey, Stephen Andrew. "Thermal design and optimization of high torque density electric machines." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/48967.

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The overarching goal of this work is to address the design of next-generation, high torque density electrical machines through numerical optimization using an integrated thermal-electromagnetic design tool that accounts for advanced cooling technology. A parametric thermal model of electric machines was constructed and implemented using a finite difference approach incorporating an automated, self segmenting mesh generation. A novel advanced cooling technology is proposed to improve thermal transport in the machine by removing heat directly from the windings via heat exchangers located between the winding bundles. Direct winding heat exchange (DWHX) requires high convective transport and low pressure loss. The heat transfer to pressure drop tradeoff was addressed by developing empirically derived Nusselt number and friction factor correlations for micro-hydrofoil enhanced meso-channels. The parametric thermal model, advanced cooling technique, Nusselt number and friction factor correlations were combined with a parametric electromagnetic model for electric machines. The integrated thermal-electromagnetic model was then used in conjunction with particle swarm optimization to determine optimal conceptual designs. The Nusselt number correlation achieves an R² value of 0.99 with 95% of the data falling within ± 2.5% similarly the friction factor correlation achieves an R² value of 0.92 with 95% of the data falling within ± 10.2%. The integrated thermal-electromagnetic design tool, incorporating DWHX, generated an optimized 20 kW permanent magnet electric machine design achieving a torque density of 23.2 N-m/L based on total system volume.
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Lamarche, Philippe. "Air stripping mass transfer correlations for volatile organics." Thesis, University of Ottawa (Canada), 1986. http://hdl.handle.net/10393/4763.

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Naderifar, Abbas. "Étude expérimentale locale et globale du transfert de matière liquide/solide à la paroi d'un réacteur à lit fixe." Vandoeuvre-les-Nancy, INPL, 1995. http://www.theses.fr/1995INPL149N.

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Le présent travail concerne une étude expérimentale de l'hydrodynamique et du transfert de matière liquide/solide à la paroi d'un réacteur à lit fixe par deux approches complémentaires: l'approche globale à l'échelle macroscopique et l'approche locale à l'échelle microscopique. La méthode polarographique, fondée sur la mesure du courant limite de diffusion d'une substance électroactive présente en faible quantité au sein de la solution liquide, a été utilisée. Deux configurations d'écoulement ont été considérées: l'écoulement monophasique du liquide et l'écoulement gaz/liquide à co-courant vers le bas. L’influence du nombre de Schmidt (nature du liquide) a été analysée dans les différents régimes hydrodynamiques proprés à chaque configuration d'écoulement. Après une description détaillée du montage expérimental et des méthodes de mesures des paramètres hydrodynamiques et du transfert de matière, un intérêt particulier a été porté à la mise au point du système de mesure, en présence et en absence de gaz, afin d'assurer une bonne qualité des mesures. Dans chaque configuration, les régimes d'écoulement, les pertes de charge et le transfert de matière ont été déterminés. Un tube en nickel platine (macroélectrode) a été utilisé pour mesurer le transfert global de matière, alors que des microélectrodes en platine, sur paroi conductrice, ont permis de mesurer le transfert local. Les mêmes microélectrodes, mais en paroi inerte, ont permis d'analyser l'hydrodynamique à l'échelle locale. En plus des techniques du traitement classique du signal, l'approche fractale a été utilisée pour caractériser les performances des réacteurs à lit fixe à travers l'état du mélangeage de la phase liquide. Tous les résultats expérimentaux ont été systématiquement confrontés aux prédictions de la littérature. En transfert de matière, des corrélations propres de nos mesures sont proposées avec une analyse statistique des paramètres utilisés pour leur établissement. Des comparaisons entre les transferts de matière et de chaleur ont été effectuées afin de mettre en évidence des analogies entre ces deux phénomènes de transport
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Jaini, Rajiv. "Mass-transfer correlations for the dual bed colloidal suspension reactor." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50210.

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To meet the growing energy world demands, and in conjunction, lower CO2 production levels, near zero emission energy sources must be pushed to the forefront as alternatives to fossil fuels. Photoelectrochemical (PEC) cells are a potential alternative to fossil fuels and have recently generated much interest because of their potential to electrolyze water into hydrogen fuel from sunlight. But in order to be competitive with fossil fuels, understanding the mass-transfer limitations in PEC systems is critical. This work focuses on the addressing the mass-transfer limitations in a conceptually novel PEC cell reactor, the Dual Bed Colloidal Suspension Reactor (DBCSR). Mass-transfer correlations for the DBCSR are presented. The correlations are based on experimental data obtained using two fabricated diffusion cells. The working correlation representative of both cells is given. An analysis of the orientation of the gas sparger suggests that the transport phenomena in both cells is not the same, and therefore using two correlations to represent similar systems is justified. An energy analysis is presented that shows that gas sparging is a low energy consumption option to mitigate mass-transfer limitations. Future work is suggested for better understanding the mass-transfer behavior in the DBCSR.
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Vuitik, Guilherme Araujo. "Estudo de parâmetros envolvidos na transferência de oxigênio em meio hídrico aerado por bolhas." Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18138/tde-03102013-103745/.

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Embora seja uma técnica tradicional, empregada largamente em processos industriais, a operação unitária de aeração pode ser otimizada ao se utilizar modelos matemáticos que descrevam seu comportamento hidrodinâmico. Diversas equações se prestam a esse fim, no entanto, avanços tecnológicos, tanto no campo instrumental como computacional, permitiram a obtenção de equações mais realísticas e abrangentes. Neste trabalho foram ajustadas e avaliadas equações para descrever três importantes parâmetros envolvidos na transferência de oxigênio em meio hídrico: coeficiente volumétrico de transferência de massa, fração de vazios e velocidade ascensional de bolhas. Para tanto, ademais da utilização de conceitos teóricos amplamente difundidos no meio acadêmico, empregou-se um conjunto de dados já existente. Essa combinação permitiu a avaliação e aproximação das equações teóricas à realidade experimental através de coeficientes de ajuste empíricos. Foram obtidos os seguintes resultados: a) revisão bibliográfica e sugestão da correlação que melhor descreve o coeficiente volumétrico de transferência de massa; b) correlação que descreve a fração de vazios, a partir da analise da concentração de bolhas segundo distribuições gaussianas; c) correlação que descreve a velocidade ascensional de bolhas em plumas. A complexidade de cada parâmetro obtido deixou clara a importância da análise isolada, precedendo a convolução dos mesmos em um único modelo, pois embora as resposta e recomendações apresentadas não forneçam conclusões definitivas sobre todos os aspectos envolvidos na transferência de oxigênio em meio hídrico, suas considerações pontuais contribuem sobremaneira ao domínio do fenômeno global, beneficiando modelagens matemáticas futuras.
Although it is a traditional technique, widely employed in industrial processes, the unit operation of aeration can be optimized when resorting to mathematical models which describe their hydrodynamic behavior. A range of equations lends itself to this purpose, however, technological advances both in the instrumental as computational field, allowed the achievement of equations more realistic and comprehensives. In this study were adjusted and evaluated equations to describe three important parameters involved in the oxygen transfer in the hydric medium: volumetric mass transfer coefficient, void fraction and upflow bubble velocity. To this end, besides the use of theoretical concepts widely disseminated in the academic literature, it was employed a set of already existing data. This combination allowed the evaluation and approximation of theoretical equations to experimental reality by means of empirical adjustment coefficients. Were obtained the following results: a) literature review and suggestion of the best correlation which describes the volumetric mass transfer coefficient, b) correlation which describes the fraction of voids, from the analysis of the concentration of bubbles by Gaussian distributions, c) correlation which describes the upflow velocity of swarms of bubbles. The complexity of each parameter obtained made clear the importance of the isolated analysis, preceding the convolution of them in a single model because although the answers and recommendations given fail to supply definitive conclusions on all aspects involved in the transfer of oxygen in hydric medium, their specific considerations contribute to the knowledge of the global phenomenon, benefiting deeply future mathematical models.
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Staudinger, Jeff. "Evaluation of mass transfer correlations for packed column air stripping of volatile organic contaminants from water supplies." Thesis, Virginia Polytechnic Institute and State University, 1986. http://hdl.handle.net/10919/101153.

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The application of packed column air stripping systems to the removal of volatile organic contaminants (VOCs) from drinking water sources was investigated. The crucial element for the design of such systems exists in obtaining accurate predictions of mass transfer rates. The first phase of this study evaluated three semi-empirical correlations available for predicting packed column mass transfer rates. From this initial screening, the Onda model was selected for further investigation. A test data base was established from water treatment pilot study results reported in the literature. Ten separate studies were selected for evaluation, encompassing approximately 450 data points. Eleven different VOCs were encountered in these investigations, and the basic packing types tested included rings, saddles, Tri-Packs, and Tellerettes. Comparison of measured mass transfer rates with the corresponding rates predicted by the Onda correlation yielded a relative standard deviation of 17%. A ± 30% accuracy value was therefore assigned to the model based on 90% confidence limits. This assessment agrees with the observed accuracy of the correlation for the chemical engineering-based system results utilized in the model's original derivation. From the overall evaluation, no severe deficiencies and/or limitations with the Onda correlation were noted. In particular, gas-phase resistance predictions appeared reasonably accurate. However, further investigative studies involving observed column performance with larger packing materials (≥2 inches in nominal size) is encouraged to verify the accuracy of the correlation for such situations. Within the context of the evaluation procedure, several related areas were investigated. First, Henry's constant temperature relations reported in the literature were established within approximately 20% for common VOCs at low concentration levels. Secondly, the transfer unit performance model for calculating observed mass transfer rates was found sensitive to experimental measurement errors below a stripping factor of 1.5. Therefore, measured results obtained under such operating conditions must be viewed with appropriate caution. Finally, economic design boundaries for column operational parameters were established based upon optimization study results reported in the literature.
M.S.
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Bohra, Lalit Kumar. "Analysis of Binary Fluid Heat and Mass Transfer in Ammonia-Water Absorption." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/19780.

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An investigation of binary fluid heat and mass transfer in ammonia-water absorption was conducted. Experiments were conducted on a horizontal-tube falling-film absorber consisting of four columns of six 9.5 mm (3/8 in) nominal OD, 0.292 m (11.5 in) long tubes, installed in an absorption heat pump. Measurements were recorded at both system and local levels within the absorber for a wide range of operating conditions (nominally, desorber solution outlet concentrations of 5 - 40% for three nominal absorber pressures of 150, 345 and 500 kPa, for solution flow rates of 0.019 - 0.034 kg/s.). Local measurements were supplemented by high-speed, high-resolution visualization of the flow over the tube banks. Using the measurements and observations from videos, heat and mass transfer rates, heat and vapor mass transfer coefficients for each test condition were determined at the component and local levels. For the range of experiments conducted, the overall film heat transfer coefficient varied from 923 to 2857 W/m2-K while the vapor and liquid mass transfer coefficients varied from 0.0026 to 0.25 m/s and from 5.51×10-6 to 3.31×10-5 m/s, respectively. Local measurements and insights from the video frames were used to obtain the contributions of falling-film and droplet modes to the total absorption rates. The local heat transfer coefficients varied from 78 to 6116 W/m2-K, while the local vapor and liquid mass transfer coefficients varied from -0.04 to 2.8 m/s and from -3.59×10-5 (indicating local desorption in some cases) to 8.96×10-5 m/s, respectively. The heat transfer coefficient was found to increase with solution Reynolds number, while the mass transfer coefficient was found to be primarily determined by the vapor and solution properties. Based on the observed trends, correlations were developed to predict heat and mass transfer coefficients valid for the range of experimental conditions tested. These correlations can be used to design horizontal tube falling-film absorbers for ammonia-water absorption systems.
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Nakano, Yushi. "Stochastic Stability of Partially Expanding Maps via Spectral Approaches." Kyoto University, 2015. http://hdl.handle.net/2433/200463.

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Kyoto University (京都大学)
0048
新制・課程博士
博士(人間・環境学)
甲第19200号
人博第741号
新制||人||178(附属図書館)
27||人博||741(吉田南総合図書館)
32192
京都大学大学院人間・環境学研究科共生人間学専攻
(主査)教授 宇敷 重廣, 教授 森本 芳則, 准教授 木坂 正史
学位規則第4条第1項該当
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Books on the topic "Mass Transfer Correlation"

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Microscales of Turbulence: Heat and Mass Transfer Correlations. CRC, 1998.

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Book chapters on the topic "Mass Transfer Correlation"

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Yapici, S., M. A. Patrick, and A. A. Wragg. "Energy Correlation of Mass Transfer in Decaying Annular Swirl Flow." In Electrochemical Engineering and Energy, 81–90. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-2514-1_9.

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Galieva, Margarita F., Daniil S. Krutenko, and Galina A. Lobova. "The Correlation Between Earth Heat Flow and Oil and Gas Potential – Fundamental Pattern of Western Siberia." In Heat-Mass Transfer and Geodynamics of the Lithosphere, 179–88. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63571-8_11.

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Stanković, I. "Optimization of Ozone Contactors in a Water Treatment Plant Using Mass Transfer Correlations." In Chemistry for the Protection of the Environment, 583–97. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3282-8_50.

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Grant, G. P., and J. I. Gerhard. "Sensitivity of Predicted DNAPL Source Zone Longevity to Mass Transfer Correlation Model." In GEOENVIRONMENTAL ENGINEERING, 59–66. Thomas Telford Publishing, 2004. http://dx.doi.org/10.1680/geimogacl.32774.0008.

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Mills, Anthony F. "Convection Fundamentals and Correlations." In Heat and Mass Transfer, 243–370. Routledge, 2018. http://dx.doi.org/10.4324/9780203752173-4.

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"Correlations for Mass Transfer Coefficients." In Gas Treating, 201–21. Chichester, UK: John Wiley & Sons, Ltd, 2014. http://dx.doi.org/10.1002/9781118877746.ch11.

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Novak, K. S., and B. D. Wood. "SOLAR COLLECTOR/REGENERATOR PERFORMANCE BASED ON EXPERIMENTAL HEAT AND MASS TRANSFER CORRELATIONS." In Intersol Eighty Five, 669–73. Elsevier, 1986. http://dx.doi.org/10.1016/b978-0-08-033177-5.50135-6.

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"Performance of Adsorptive Heat Storage Devices for Heat Supply." In Technology Development for Adsorptive Heat Energy Converters, 124–73. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-4432-7.ch005.

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The chapter is focused on modelling of performance of adsorptive heat storage devices and estimation of performance of heat storage devices. Two groups of models of adsorptive heat storage units suggested previous researchers are analyzed. The first one is focused on predicting the heat energy storage density, it being based on Dubinin-Polanyi theory. The second one is devoted to analyzing the kinetic of adsorption processes and performance of the adsorber or adsorptive-desorptive reactor filled with traditional adsorbent or salt which forms crystalline hydrates. The key drawback of both groups of models concerns with considering only one stage of exploitation of adsorptive heat storage device in spite of its operating in two-stage mode, that is, alternating discharge (adsorption) and charge (regeneration). It inhibits estimation of efficiency of adsorptive heat storage device basing on full operating cycle and its involving in heat supply system. Two algorithms for estimation of operating parameters are proposed by authors for closed-type and open-type heat storage devices. The algorithm for calculation of operating parameters of closed type adsorptive heat storage device is proposed: calculation of the mass transfer coefficient, adsorption, useful heat, that is, heat of adsorption, determination of the heat input, it being calculated as heat inputs for heating the adsorbent, device housing, water in the tank, evaporation of water in the tank, heating of the adsorbed water and desorption. Then efficiency factor is calculated. The operating characteristics of a closed-type heat energy storage device were studied when the composite adsorbent ‘silica gel – sodium sulphate' used. The effect of the humid airflow velocity on the efficiency factor is taken into account by introducing a coefficient equal to the value of the adsorption. An increase in the efficiency coefficient was stated when the velocity and relative humidity of the airflow. It is shown that the humid air flow temperature practically does not affect its value. Having been used the suggested algorithm, the optimal operating characteristics of an adsorptive heat storage device of a closed type based on a composite adsorbent ‘silica gel – sodium sulphate' for a private house heating system are revealed to be humid air velocities of 0.6 – 0.8 m/s and relative humidity 40 – 60%. When these operational data applied, the efficiency coefficient is shown to reach the maximum values (about 55%). Algorithm of calculation of operating parameter of open-type heat storage device includes computation of mass transfer coefficient, adsorption, useful heat (heat of adsorption), heat input for heating the adsorbent, device casing, water in the humidifier, evaporation of water, heating the adsorbed water, desorption, and calculating efficiency coefficient. Performance of open-type heat storage device based on the composite adsorbent ‘silica gel – sodium sulphate' is estimated. The optimal operating conditions of the heat accumulating device which allow operating with maximal magnitudes of efficiency coefficients 53 – 57% are stated to be humid airflow speed of 0.6 – 0.8 m/s and relative humidity of 40 – 60%. Correlation between efficiency factors obtained by experiments and calculated with suggested algorithm is confirmed. The possibility of reducing the power consumption when heat storage devices applied in 2,4 – 90 times versus decentralized heating systems on basis of solid fuel boiler, gas boiler and electric boiler is stated when open-type sorptive heat storage device used. Results of the study can be used to develop adsorptive storage devices in decentralized heat supply and ventilation systems and adsorption units for utilization of low-temperature waste heat.
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Chen, Liang, Shuqing Wang, Jens-Uwe Repke, and Günter Wozny. "Extending Mass Transfer Correlations for Packed Three-Phase Distillation Simulation: A Hierarchical Parameter Estimation Methodology." In Computer Aided Chemical Engineering, 441–46. Elsevier, 2009. http://dx.doi.org/10.1016/s1570-7946(09)70294-9.

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Fallahnezhad, Mehdi, and Salman Zaferanlouei. "A Hybrid Higher Order Neural Structure for Pattern Recognition." In Artificial Higher Order Neural Networks for Modeling and Simulation, 364–87. IGI Global, 2013. http://dx.doi.org/10.4018/978-1-4666-2175-6.ch017.

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Considering high order correlations of selected features next to the raw features of input can facilitate target pattern recognition. In artificial intelligence, this is being addressed by Higher Order Neural Networks (HONNs). In general, HONN structures provide superior specifications (e.g. resolving the dilemma of choosing the number of neurons and layers of networks, better fitting specs, quicker, and open-box specificity) to traditional neural networks. This chapter introduces a hybrid structure of higher order neural networks, which can be generally applied in various branches of pattern recognition. Structure, learning algorithm, and network configuration are introduced, and structure is applied either as classifier (where is called HHONC) to different benchmark statistical data sets or as functional behavior approximation (where is called HHONN) to a heat and mass transfer dilemma. In each structure, results are compared with previous studies, which show its superior performance next to other mentioned advantages.
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Conference papers on the topic "Mass Transfer Correlation"

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Vengrenovich, Roman, S. V. Yarema, Bogdan Ivanskii, Ivan Fuchyla, and Miroslav Stasyk. "Mass transfer in the Ostwald's cluster ripening process: generalized Lifshits-Slyozov-Wagner distribution." In Correlation Optics 2011, edited by Oleg V. Angelsky. SPIE, 2011. http://dx.doi.org/10.1117/12.919779.

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Hoyer, K., M. Holzner, and W. Kinzelbach. "Correlation based Particle Tracking Velocimetry." In Turbulence, Heat and Mass Transfer 5. Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer. New York: Begellhouse, 2006. http://dx.doi.org/10.1615/ichmt.2006.turbulheatmasstransf.390.

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Sato, Yohei, M. Koyasu, and Koichi Hishida. "Effect of Pressure-Velocity Correlation on Turbulence Modification in a Bubbly Pipe Flow." In Turbulence, Heat and Mass Transfer 5. Proceedings of the International Symposium on Turbulence, Heat and Mass Transfer. New York: Begellhouse, 2006. http://dx.doi.org/10.1615/ichmt.2006.turbulheatmasstransf.1420.

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Li, Wei, and Zan Wu. "Generalized Adiabatic Two-Phase Pressure Drop Correlation in Evaporative Micro/Mini-Channels." In ASME 2009 Second International Conference on Micro/Nanoscale Heat and Mass Transfer. ASMEDC, 2009. http://dx.doi.org/10.1115/mnhmt2009-18065.

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This paper presents an adiabatic two-phase pressure drop correlation using quality, the reduced pressure, Bond number, Froude number and Weber number covering wide range of channel dimensions, working fluids and operational conditions. With the channel diameter less than 3.25mm, existing adiabatic two-phase pressure drop database and correlations are reviewed. However, none of the existing correlations can predict the data sets precisely. Theoretically, there are four forces related to two-phase flow in channels: body forces, inertia, viscous and surface tension. The basic reason for the difference between conventional channel and micro-channel is the relative significance of the four forces. Thus, Bo (body forces/surface tension), Fr (inertia forces/gravitational forces) and We (inertia forces/surface tension) were included in the new correlation. Viscous force is considered in the reduced pressure term. The new correlation predicts the existing data sets accurately. Furthermore, Bond number could be used as a criterion to classify a flow path as a micro-channel or conventional channel.
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Orman, Łukasz J. "Correlation for Nucleate Boiling Heat Transfer on Microstructural Coatings." In The 3rd World Congress on Momentum, Heat and Mass Transfer. Avestia Publishing, 2018. http://dx.doi.org/10.11159/icmfht18.117.

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Ahluwalia, R. K., and K. H. Im. "Correlation Between Sodium Sulfate Mass Transfer and Low-Temperature Hot Corrosion." In ASME 1988 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1988. http://dx.doi.org/10.1115/88-gt-133.

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A mass transfer model is developed that considers diffusive and chemical aspects of sodium sulfate formation and deposition on cooled blades of coal-fired gas turbines. The roles of gas phase condensation of sodium sulfate and multicomponent diffusion across a chemically frozen thin boundary layer are elaborated. A rational procedure is presented for correlating material wastage with laboratory weight gain data obtained by exposing alloy specimens pre-coated with a thin film of salt to SO2-SO3 in an oxygen environment. The sodium sulfate mass transfer model is used in conjunction with the correlation to project blade corrosion and lifetime as a function of gas turbine inlet temperature, blade cooling, and sodium and sulfur contaminant concentration.
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Fu, Song, and S. Y. Hung. "Revisiting the pressure-strain correlation model with the aid of the rapid distortion theory." In Turbulence, Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence, Heat and Mass Transfer. Connecticut: Begellhouse, 2009. http://dx.doi.org/10.1615/ichmt.2009.turbulheatmasstransf.2360.

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Jurcisinova, E., M. Jurcisin, and R. Remecky. "Passive vector advection in the turbulent velocity field with finite correlation time: two-loop approximation." In Turbulence, Heat and Mass Transfer 6. Proceedings of the Sixth International Symposium On Turbulence, Heat and Mass Transfer. Connecticut: Begellhouse, 2009. http://dx.doi.org/10.1615/ichmt.2009.turbulheatmasstransf.1330.

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Baxi, C. B., O. Gutierrez, R. Schleicher, and C. M. Kendall. "Heat and Mass Transfer in Parallel Flow Mist Cooling." In ASME 2003 Heat Transfer Summer Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/ht2003-47552.

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The lasing gain media (LGM) of the solid-state heat capacity laser (SSHCL) need to be cooled in a short time in between laser operations to increase the duty cycle. Parallel flow mist cooling is an attractive option to accomplish this. However, no general correlations exist to predict parallel flow mist cooling heat transfer for various fluids. In order to obtain such a correlation this study was undertaken. Drop size distribution from different nozzles was characterized by laser Doppler anemometer. A parallel flow mist cooling experimental set-up was designed and fabricated. Data from over 300 experiments with air, air-water mist, air-denatured ethanol mist and air-pure ethanol mist was obtained. The parameter ranges were: flow velocity between 5 and 50 m/s, drop diameters between 18 and 75 μm, mist concentrations as high as 0.2 kg/m3, heat fluxes up to 170000 W/m2 and hydraulic diameters between 0.003 and 0.008 m. An enhancement of up to a factor of six relative to the heat flux removed by air was obtained. The experiments indicated that there are four regimes in parallel flow mist cooling. These are: 1) Mass transfer, 2) Forced convection 3), Critical Heat Flux and 4) Film boiling. Two general correlations for parallel flow mist cooling are proposed for the first two of these regimes.
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Lv, Tong, Boren Zheng, Wei Li, and Zahid Ayub. "A Modified Correlation for Flow Boiling Heat Transfer in Plate Heat Exchangers." In ASME 2019 6th International Conference on Micro/Nanoscale Heat and Mass Transfer. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/mnhmt2019-4037.

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Abstract Corrugated plate heat exchangers are increasingly used in two-phase flow applications for their flexible and compact size and the efficient heat transfer performance. This paper presents a review of recent studies on the subject and creates a database containing 533 data points from experiment studies. The collected database covers seven working fluids, a wide range of vapor quality (both mean and local) 0.01–0.94, heat flux 0.5–46 kW m−2, mass flux 5.5–137 kg m−2 s−1, chevron angle 30°–70°, and hydraulic diameter 1.7–4.0 mm. Based on the database a brief comparison between several previous correlations are discussed. A new prediction method for flow boiling heat transfer coefficient is generated by multiple regression analysis and modifying an existing correlation. It was observed that the modified correlation shows a better agreement and predicts 74.3% of data points within ±30% error band and 94.9% within ±50% error band.
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