Bibliografie tematiche / Transport Phenomena Engineering Thermodynamics

Letteratura scientifica selezionata sul tema "Transport Phenomena Engineering Thermodynamics"

Autore: Grafiati

Pubblicato: 26 luglio 2024

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Articoli di riviste sul tema "Transport Phenomena Engineering Thermodynamics"

Chang, Shyy Woei. "Recent Advances in Fluid Mechanics and Transport Phenomena". Inventions 8, n. 6 (27 ottobre 2023): 136. http://dx.doi.org/10.3390/inventions8060136.

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Soni, Surbhi, Gunjan Chauhan, Bhawna Pareek, Pankaj Sharma e Rajan Chopra. "Binary Liquid Mixtures Nonanol and Decanol with their Thermodynamic and Transport Behavior: A Review". Research Journal of Chemistry and Environment 26, n. 9 (25 agosto 2022): 167–74. http://dx.doi.org/10.25303/2609rjce1670174.

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Abstract (sommario):

The extensive knowledge about structural phenomena of mixtures is of indispensable importance in the development of theories in liquid state. The information about structural and molecular interactions of liquid mixtures is quite vital from both fundamental and engineering point of view and can be utilized for further studies. For a better understanding of the non-ideal behavior of complex systems, fundamental thermodynamic and thermo-physical properties are the varied sources in which information is required. The excess thermodynamic properties are very sensitive to variables such as size, shape, composition, temperature and pressure, therefore an important information about the differences in the intermolecular interactions was obtained using these binary liquid mixtures under a range of physiochemical conditions. By using thermodynamics quantities, we can calculate the deviation of thermodynamics properties from those of an ideal mixture. These properties are necessary for the development of thermodynamic models required in optimized processes of the chemical, petrochemical, pharmaceutical and other industries. Along with diverse industrial applications, binary liquid mixtures can have hazardous effects such as pollutants causing air, water and soil contamination and some of them may have cancerous features. Their organic compounds and derivatives prepared from them are employed in a range of industrial and consumer applications such as perfumes, cosmetics, paints, varnishes, drugs, fuels, explosives, fats, dyes, waxes, resins, plastics, rubber, detergents, DDT etc. making them commercially important.

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Luca, Rodica. "Advances in Boundary Value Problems for Fractional Differential Equations". Fractal and Fractional 7, n. 5 (17 maggio 2023): 406. http://dx.doi.org/10.3390/fractalfract7050406.

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Fractional-order differential and integral operators and fractional differential equations have extensive applications in the mathematical modelling of real-world phenomena which occur in scientific and engineering disciplines such as physics, chemistry, biophysics, biology, medical sciences, financial economics, ecology, bioengineering, control theory, signal and image processing, aerodynamics, transport dynamics, thermodynamics, viscoelasticity, hydrology, statistical mechanics, electromagnetics, astrophysics, cosmology, and rheology [...]

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Del Río P., J. A., e M. López De Haro. "Extended irreversible thermodynamics as a framework for transport phenomena in porous media". Transport in Porous Media 9, n. 3 (novembre 1992): 207–21. http://dx.doi.org/10.1007/bf00611967.

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Wachutka, Gerhard. "UNIFIED FRAMEWORK FOR THERMAL, ELECTRICAL, MAGNETIC, AND OPTICAL SEMICONDUCTOR DEVICE MODELING". COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 10, n. 4 (1 aprile 1991): 311–21. http://dx.doi.org/10.1108/eb051708.

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The “thermodynamic model” constitutes a unified theoretical framework for the coupled simulation of carrier and energy flow in semiconductor devices under general ambient conditions such as, e.g., the presence of a quasi‐static magnetic field or the interaction with an electromagnetic radiation field (light). The current relations governing particle and heat transport are derived from the principles of irreversible phenomenological thermodynamics; the driving forces include drift, diffusion, thermal diffusion, and deflection by the Lorentz force. All transport coefficients may be interpreted in terms of well‐known thermodynamic effects and, hence, can be obtained from theoretical calculations as well as directly from experimental data. The thermodynamic model allows the consistent treatment of a wide variety of physical phenomena which are relevant for both the operation of electronic devices (e.g., lattice heating, hot carrier and low temperature effects) and the function of microsensors and actuators (e.g., thermoelectricity, galvanomagnetism and thermomagnetism).

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Misra, N. N., Alex Martynenko, Farid Chemat, Larysa Paniwnyk, Francisco J. Barba e Anet Režek Jambrak. "Thermodynamics, transport phenomena, and electrochemistry of external field-assisted nonthermal food technologies". Critical Reviews in Food Science and Nutrition 58, n. 11 (2 giugno 2017): 1832–63. http://dx.doi.org/10.1080/10408398.2017.1287660.

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Shnaid,, Isaac. "Thermodynamical Proof of Transport Phenomena Kinetic Equations". Journal of the Mechanical Behavior of Materials 11, n. 5 (ottobre 2000): 353–64. http://dx.doi.org/10.1515/jmbm.2000.11.5.353.

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Oliveira, Idalmo M., Varadarajan Seshadri e Marcelo B. Mansur. "Analysis of Drying Kinetics of Iron Ores using Irreversible Thermodynamics and Transport Phenomena Principles". Canadian Journal of Chemical Engineering 82, n. 5 (19 maggio 2008): 956–67. http://dx.doi.org/10.1002/cjce.5450820511.

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Pañeda, Emilio Martínez. "Progress and opportunities in modelling environmentally assisted cracking". RILEM Technical Letters 6 (19 luglio 2021): 70–77. http://dx.doi.org/10.21809/rilemtechlett.2021.145.

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Environmentally assisted cracking phenomena are widespread across the transport, defence, energy and construction sectors. However, predicting environmentally assisted fractures is a highly cross-disciplinary endeavour that requires resolving the multiple material-environment interactions taking place. In this manuscript, an overview is given of recent breakthroughs in the modelling of environmentally assisted cracking. The focus is on the opportunities created by two recent developments: phase field and multi-physics modelling. The possibilities enabled by the confluence of phase field methods and electro-chemo-mechanics modelling are discussed in the context of three environmental assisted cracking phenomena of particular engineering interest: hydrogen embrittlement, localised corrosion and corrosion fatigue. Mechanical processes such as deformation and fracture can be coupled with chemical phenomena like local reactions, ionic transport and hydrogen uptake and diffusion. Moreover, these can be combined with the prediction of an evolving interface, such as a growing pit or a crack, as dictated by a phase field variable that evolves based on thermodynamics and local kinetics. Suitable for both microstructural and continuum length scales, this new generation of simulation-based, multi-physics phase field models can open new modelling horizons and enable Virtual Testing in harmful environments.

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Motolinía-Alcántara, Elizabeth Alejandra, Carlos Omar Castillo-Araiza, Mario Rodríguez-Monroy, Angélica Román-Guerrero e Francisco Cruz-Sosa. "Engineering Considerations to Produce Bioactive Compounds from Plant Cell Suspension Culture in Bioreactors". Plants 10, n. 12 (14 dicembre 2021): 2762. http://dx.doi.org/10.3390/plants10122762.

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The large-scale production of plant-derived secondary metabolites (PDSM) in bioreactors to meet the increasing demand for bioactive compounds for the treatment and prevention of degenerative diseases is nowadays considered an engineering challenge due to the large number of operational factors that need to be considered during their design and scale-up. The plant cell suspension culture (CSC) has presented numerous benefits over other technologies, such as the conventional whole-plant extraction, not only for avoiding the overexploitation of plant species, but also for achieving better yields and having excellent scaling-up attributes. The selection of the bioreactor configuration depends on intrinsic cell culture properties and engineering considerations related to the effect of operating conditions on thermodynamics, kinetics, and transport phenomena, which together are essential for accomplishing the large-scale production of PDSM. To this end, this review, firstly, provides a comprehensive appraisement of PDSM, essentially those with demonstrated importance and utilization in pharmaceutical industries. Then, special attention is given to PDSM obtained out of CSC. Finally, engineering aspects related to the bioreactor configuration for CSC stating the effect of the operating conditions on kinetics and transport phenomena and, hence, on the cell viability and production of PDSM are presented accordingly. The engineering analysis of the reviewed bioreactor configurations for CSC will pave the way for future research focused on their scaling up, to produce high value-added PDSM.

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Tesi sul tema "Transport Phenomena Engineering Thermodynamics"

Cardona, Claudia. "Uranium Sequestration by pH Manipulation using NH3 Injection in the Vadose Zone of Hanford Site 200 Area". FIU Digital Commons, 2017. http://digitalcommons.fiu.edu/etd/3352.

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Past nuclear weapon production activities have left a significant legacy of uranium (U) contamination in the vadose zone (VZ) of the Department of Energy (DOE) Hanford Site. This U is a source of groundwater (GW) contamination. There is a concern that elevated U concentration would slowly infiltrate through the VZ, reach the GW water table, and then end up in nearby rivers and lakes. Remediation of U-contaminated low moisture content soil is a challenging task considering the VZ depth, where contamination is found between 70 and 100 m below the ground surface, and the formation of highly soluble and stable CaUO2CO3 complexes is influenced by Hanford’s soil rich in carbonate. Injection of reactive gasses (e.g., NH3) is a promising technology to decrease U migration in through the VZ. The NH3 injection creates alkaline conditions that would alter the pore water chemistry (e.g., dissolving some aluminosilicates). Over time as the pH neutralizes, U(VI) could precipitate as uranyl mineral (e.g., Na-boltwoodite). Also, the dissolved U(VI) could be incorporated into the structure of some mineral phases or be coated by non-U minerals. These chemical reactions could control the U(VI) mobility to the GW. However, there is a lack of knowledge on how the VZ pore water constituents (e.g., Si, Al3+, HCO3-, and Ca2+) would affect U(VI) removal/precipitation in alkaline conditions. This study quantified the role of the major pore water constituents on the U(VI) removal and evaluated the uranyl minerals that could precipitate from a variety of SPW solutions. Results showed that the percentage of U(VI) removal was controlled by Si/Al ratios and Ca2+ concentration regardless of HCO3- concentration tested. XRD revealed the presence of uranyl minerals by analyzing precipitates formed from SPW solutions, but none of them were identified as uranyl silicates as expected from speciation modeling. The SEM images displayed dense amorphous regions high in silica content, where EDS elemental analysis unveiled higher U atomic percentage in some samples. U(VI) silicate and carbonate minerals were predicted by the speciation modeling.

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Rowane, Aaron J. "High-Temperature, High-Pressure Viscosities and Densities of Toluene". VCU Scholars Compass, 2016. http://scholarscompass.vcu.edu/etd/4188.

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High-temperature, high-pressure (HTHP) conditions are exemplified in ultra-deep petroleum reservoirs and can be exhibited within diesel engines. Accurate pure component hydrocarbon data is essential in understanding the overall behavior of petroleum and diesel fuel at these conditions. The present study focuses on the HTHP properties of toluene since this hydrocarbon is frequently used to increase the octane rating of gasoline and toluene occurs naturally in crude oil. In this thesis experimental densities and viscosity are presented to 535 K and 300 MPa extending the database of toluene viscosity data to higher temperature than previous studies. The data is correlated to a Tait-like equation and a Padѐ approximate in conjunction with a single mapping of the isotherms. Free-volume theory and a superposition of the viscosity in relation to the Leonnard-Jones repulsive force are both used to model the toluene viscosity data. It was found that the data are in good agreement with the available literature data.

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Swartz, Melody A. "Interstitial-lymphatic transport phenomena". Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50376.

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Derivaux, Jean-Francois. "Stochastic thermodynamics of transport phenomena and reactive systems: an extended local equilibrium approach". Doctoral thesis, Universite Libre de Bruxelles, 2020. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/308809.

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Avec les progrès de la technologie, il est désormais devenu possible de manipuler des faibles quantités d’objets nanométriques, voire des objets uniques. Observer une réaction chimique de quelques centaines de molécules sur des catalyseurs, étudier le travail exercé lors du déploiement d’un brin d’ADN unique ou mesurer la chaleur émise par un unique électron dans un circuit électrique constituent aujourd’hui des actes expérimentaux courants. Cependant, à cette échelle, le caractère aléatoire des processus physiques étudiés se fait plus fortement ressentir. Développer une théorie thermodynamique à ces échelles nécessite d'y inclure de manière exhaustive ces fluctuations.Ces préoccupations et les résultats expérimentaux et théoriques associés ont mené à l’émergence de ce que l’on appelle aujourd’hui la thermodynamique stochastique. Cette thèse se propose de développer une approche originale à la thermodynamique stochastique, basée sur une extension de l'hypothèse d'équilibre local aux variables fluctuantes d'un système. Cette théorie offre de nouvelles définitions des grandeurs thermodynamiques stochastiques, dont l'évolution est donnée par des équations différentielles stochastiques (EDS).Nous avons choisi d'étudier cette théorie à travers des modèles simplifiés de phénomènes physiques variés; transport (diffusif) de chaleur ou de masse, transport couplé (comme la thermodiffusion), ainsi que des modèles de réactions chimiques linéaires et non-linéaires. A travers ces exemples, nous avons proposé des versions stochastiques de plusieurs grandeurs thermodynamiques d'intérêt. Une large part de cette thèse est dévolue à l'entropie et aux différents termes apparaissant dans son bilan (flux d'entropie, production d'entropie ou dissipation). D'autres exemples incluent l'énergie libre d'Helmholtz, la production d'entropie d'excès, ou encore les efficacités thermodynamiques dans le transport couplé.A l'aide de cette théorie, nous avons étudié les propriétés statistiques de ces différentes grandeurs, et plus particulièrement l'effet des contraintes thermodynamiques ainsi que les propriétés cinétiques du modèle sur celles-là. Dans un premier temps, nous montrons comment l'état thermodynamique d'un système (à l' équilibre ou hors d'équilibre) contraint la forme de la distribution de la production d'entropie. Au-delà de la production d'entropie, cette contrainte apparaît également pour d'autres quantités, comme l'énergie libre d'Helmholtz ou la production d'entropie d'excès. Nous montrons ensuite comment des paramètres de contrôle extérieurs peuvent induire des bimodalités dans les distributions d'efficacités stochastiques.Les non-linéarités de la cinétique peuvent également se répercuter sur la thermodynamique stochastique. En utilisant un modèle non-linéaire de réaction chimique, le modèle de Schlögl, nous avons calculé la dissipation moyenne, non-nulle, engendrée par les fluctuations du système. Les non-linéarités offrent aussi la possibilité de produire des bifurcations dans le système. Les différentes propriétés statistiques (moments et distributions) de la production d'entropie ont été étudiées à différents points avant, pendant et après la bifurcation dans le modèle de Schlögl.Ces nombreuses propriétés ont été étudiées via des développements analytiques supportés par des simulations numériques des EDS du système. Nous avons ainsi pu montrer la fine connexion existant entre les équations cinétiques du système, les contraintes thermodynamiques et les propriétés statistiques des fluctuations de différentes grandeurs thermodynamiques stochastiques.
Over the last decades, nanotechnology has experienced great steps forwards, opening new ways to manipulate micro- and nanosystems. These advances motivated the development of a thermodynamic theory for such systems, taking fully into account the unavoidable fluctuations appearing at that scale. This ultimately leads to an ensemble of experimental and theoretical results forming the emergent field of stochastic thermodynamics. In this thesis, we propose an original theoretical approach to stochastic thermodynamics, based on the extension of the local equilibrium hypothesis (LEH) to fluctuating variables in small systems. The approach provides new definitions of stochastic thermodynamic quantities, whose evolution is given by stochastic differential equations (SDEs).We applied this new formalism to a diverse range of systems: heat or mass diffusive transport, coupled transport phenomena (thermodiffusion), and linear or non-linear chemical systems. In each model, we used our theory to define key stochastic thermodynamic quantities. A great emphasis has been put on entropy and the different contributions to its evolution (entropy flux and entropy production) throughout this thesis. Other examples include also the stochastic Helmholtz energy, stochastic excess entropy production and stochastic efficiencies in coupled transport. We investigated how the statistical properties of these quantities are affected by external thermodynamic constraints and by the kinetics of the system. We first studied how the thermodynamic state of the system (equilibrium \textit{vs.} non-equilibrium) strongly impacts the distribution of entropy production. We then extended those findings to other related quantities, such as the Helmholtz free energy and excess entropy production. We also analysed how some external control parameters could lead to bimodality in stochastic efficiencies distributions.In addition, non-linearities affect stochastic thermodynamics quantities in different ways. Using the example of the Schlögl chemical model, we computed the average dissipation of the fluctuations in a non-linear system. Such systems can also undergo a bifurcation, and we studied how the moments and the distribution of entropy production change while crossing the critical point.All these properties were investigated with theoretical analyses and supported by numerical simulations of the SDEs describing the system. It allows us to show that properties of the evolution equations and external constraints could strongly reflect in the statistical properties of stochastic thermodynamic quantities.
Doctorat en Sciences
info:eu-repo/semantics/nonPublished

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Hamilton, C. J. "Transport phenomena in hydrogel membranes". Thesis, Aston University, 1988. http://publications.aston.ac.uk/9719/.

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In this thesis the factors surrounding the permeation of alkali and alkaline earth metal salts through hydrogel membranes are investigated. Although of relevance to aqueous separations in general, it was with their potential application in sensors that this work was particularly concerned. In order to study the effect that the nature of the solute has on the transport process, a single polymer matrix, poly (2-hydroxyethyl methacrylate), was initially studied. The influence of cation variation in the presence of a fixed anion was looked at, followed by the effect of the anion in the presence of a fixed cation. The anion was found to possess the dominant influence and tended to subsume any influence by the cation. This is explained in terms of the structure-making and structure-breaking characteristics of the ions in their solute-water interactions. Analogies in the transport behaviour of the salts are made with the Hofmeister series. The effect of the chemical composition of the polymer backbone on the water structuring in the hydrogel and, consequently, transport through the membrane, was investigated by preparing a series of poly (2-hydroxyethyl methacrylate) copolymer membranes and determining the permeability coefficient of salts with a fixed anion. The results were discussed in terms of the `free-volume' model of permeation and the water structuring of the polymer backbone. The ability of ionophores to selectively modulate the permeation of salts through hydrogel membranes was also examined. The results indicated that a dualsorption model was in operation. Finally, hydrogels were used as membrane overlays on coated wire ion-selective electrodes that employed conventional plasticised-PVC-valinomycin based sensing membranes. The hydrogel overlays were found to affect the access of the analyte but not the underlying electrochemistry.

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Powell, Adam Clayton IV. "Transport phenomena in electron beam melting and evaporation". Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/39623.

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Luo, Xukun. "High pressure three-phase fluidization : hydrodynamics and transport phenomena /". The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487948440825092.

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Sadomba, Clara P. (Clara Petronella). "A computational study of transport phenomena in RH-ladles". Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23377.

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A numerical study was carried out to predict three dimensional turbulent flow heat and mass transfer in RH-ladles. To model the turbulence in the system, the popular Launder and Sharma (7) version of the low Reynolds number k-$ varepsilon$ model was employed. The governing equations for fluid flow and heat transfer were solved using a control volume-based finite difference method. The buoyancy effect in the axial momentum equation was incorporated through the Boussinesq approximation. From the fluid flow and turbulence characteristics predicted by the numerical model, the mass transfer occurring from the dissolution of steel rods immersed in the liquid steel was computed using the Sherwood number correlation recently proposed by Mazumdar et al. (25). The parameters studied include: the flow rate of steel, the heat flux from the solid walls and various radial positions of the vertically immersed steel rod. The fluid flow results are presented as vector plots. The heat transfer aspects are shown through temperature contours at various vertical planes and the mass transfer results are graphically presented in plots showing variance of mass transfer coefficients with key parameters.
The flow field results were found to be in qualitative agreement with previously reported 3D numerical studies for similar systems. Due to the lack of any experimental or numerical results related to heat and/or mass transfer in RH-ladles, the heat and mass transfer results obtained in the present study could not be compared and verified.

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Zhang, Hao. "Gravity-dependent transport phenomena in zeolite crystal growth". Case Western Reserve University School of Graduate Studies / OhioLINK, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=case1060021149.

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Pongsaksawad, Wanida. "Numerical modeling of interface dynamics and transport phenomena in transport-limited electrolysis processes". Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36209.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2006.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (p. 111-117).
Electrochemical reactions in materials and processes induce morphological instability on the cathode, which can lead to porous deposits or system failure. The growth of the protrusion is a complex phenomenon which involves chemical, electrical, and momentum driving forces in the system. Thus, it is important to understand the effect of electrochemistry in phase boundary evolution in order to optimize the performance of such processes. This thesis contributes to predicting and controlling such interface instability phenomena by developing a computational model that captures them. Successful application of the model to emerging metal extraction processes demonstrates its usefulness. A phase field model of electrochemical interface is developed for transport-limited electrolysis with rapid charge redistribution. This new Cahn-Hillard phase field formulation includes a model electrostatic free energy term, which captures the behavior of the diffuse interface under the applied electric field, in addition to transport by free energy gradient and convection. The model agrees with published stability criterion for a solid cathode. When the electrodes and electrolyte are low-viscosity fluids, flow stabilizes the interface.
(cont.) A new stability criterion for metal reduction in a liquid-liquid system is derived and agrees well with the model results. Next, the phase field model is extended for a ternary system to model titanium reduction in a supported electrolyte system. The model can simulate phase boundaries migration depending on the composition of the electrolyte and also electronically mediated reactions. Finally, Solid Oxide Membrane Electrolytic Smelting with Rotating Cathode (SOMERC), an emerging technology to electrolytically reduce titanium oxide from molten salt, is investigated. In the SOMERC process, rotational flow is introduced to create shear force that is expected to stabilize the interface. Computational fluid dynamics models of rotational flow are carried out to estimate the relationship between cathode rotational speed, shear strain rate, and boundary layer thicknesses. The phase field model presented in this thesis can be applied to any electrochemical reduction processes that are in the mass-transport controlled regime. Stability criteria and detailed morphology in two and three dimensions can be explored.
by Wanida Pongsaksawad.
Ph.D.

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Libri sul tema "Transport Phenomena Engineering Thermodynamics"

Wang, Liqiu. Advances in Transport Phenomena 2010. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011.

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Transport phenomena in micro process engineering. Berlin: Springer, 2008.

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Beek, W. J. Transport phenomena. 2^a ed. Chichester: Wiley, 1999.

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Ichikawa, Yasuaki. Transport Phenomena in Porous Media: Aspects of Micro/Macro Behaviour. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Guo, Weidong. The Application of the Chebyshev-Spectral Method in Transport Phenomena. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Slattery, John C. Interfacial Transport Phenomena. New York, NY: Springer New York, 1990.

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Slattery, John Charles. Advanced transport phenomena. New York: Cambridge University Press, 1999.

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Bird, R. Byron. Transport phenomena. 2^a ed. New York: J. Wiley, 2002.

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Thomson, William J. Introduction to transport phenomena. Upper Saddle River, N.J: Prentice Hall PTR, 2000.

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Deen, William M. Analysis of transport phenomena. New York: Oxford University Press, 1998.

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Capitoli di libri sul tema "Transport Phenomena Engineering Thermodynamics"

Simpson, Ricardo, e Sudhir K. Sastry. "A Glimpse of Thermodynamics and Transport Phenomena". In Chemical and Bioprocess Engineering, 105–36. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-9126-2_6.

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Skačej, Gregor, e Primož Ziherl. "Transport Phenomena". In Solved Problems in Thermodynamics and Statistical Physics, 103–11. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-27661-4_7.

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Keszei, Ernő. "Toward Equilibrium: Elements of Transport Phenomena". In Chemical Thermodynamics, 307–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-19864-9_11.

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Mauri, Roberto. "Thermodynamics and Evolution". In Transport Phenomena in Multiphase Flows, 1–21. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-15793-1_1.

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Ichikawa, Yasuaki, e A. P. S. Selvadurai. "Non-equilibrium Thermodynamics". In Transport Phenomena in Porous Media, 77–137. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25333-1_3.

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Mauri, Roberto. "Thermodynamics and Evolution". In Transport Phenomena in Multiphase Flows, 1–22. Cham: Springer International Publishing, 2023. http://dx.doi.org/10.1007/978-3-031-28920-0_1.

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Hayes, R. E., e S. T. Kolaczkowski. "Thermodynamics, Kinetics and Transport Phenomena". In Introduction to Catalytic Combustion, 97–279. London: Routledge, 2021. http://dx.doi.org/10.1201/9780203750186-2.

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Struchtrup, Henning. "Linear Irreversible Thermodynamics". In A Thermodynamic Introduction to Transport Phenomena, 69–82. Cham: Springer Nature Switzerland, 2024. http://dx.doi.org/10.1007/978-3-031-61868-0_4.

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Plawsky, Joel L. "Macroscopic or Engineering Balances". In Transport Phenomena Fundamentals, 491–548. Fourth edition. | Boca Raton : CRC Press, [2019] | Series: Chemical industries: CRC Press, 2020. http://dx.doi.org/10.1201/9781315113388-11.

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Bear, Jacob. "Some Elements of Thermodynamics". In Modeling Phenomena of Flow and Transport in Porous Media, 99–173. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72826-1_2.

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Atti di convegni sul tema "Transport Phenomena Engineering Thermodynamics"

Cho, Kyoung-Youn, e T. L. Eddy. "THERMODYNAMIC AND TRANSPORT PROPERTIES OF NON-EQUILIBRIUM PLASMA". In Transport Phenomena in Thermal Engineering. Volume 2. Connecticut: Begellhouse, 2023. http://dx.doi.org/10.1615/istp-vi.1190.

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Shou, Wan, e Heng Pan. "Transport and Interfacial Phenomena in Nanoscale Confined Laser Crystallization". In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2818.

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Abstract (sommario):

Laser processing (sintering, melting, crystallization and ablation) of nanoscale materials has been extensively employed for electronics manufacturing including both integrated circuit and emerging printable electronics. Many applications in semiconductor devices require annealing step to fabricate high quality crystalline domains on substrates that may not intrinsically promote the growth of high crystalline films. The recent emergence of FinFETs (Fin-shaped Field Effect Transistor) and 3D Integrated Circuits (3D-IC) has inspired the study of crystallization of amorphous materials in nano/micro confined domains. Using Molecular Dynamics (MD) simulation, we study the characteristics of unseeded crystallization within nano/microscale confining domains. Firstly, it is demonstrated that unseeded crystallization can yield single crystal domains facilitated by the confinement effects. A phenomenological model has been developed and tailored by MD simulations, which was applied to quantitatively evaluate the effects of domain size and processing laser pulse width on single crystal formation. Secondly, to predict crystallization behaviors on confining walls, a thermodynamics integration scheme will be used to calculate interfacial energies of Si-SiO2 interfaces.

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Baschuk, J., e Xianguo Li. "Applying the Generalized Stefan-Maxwell Equations to Ion and Water Transport in the Polymer Electrolyte of a PEM Fuel Cell". In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41660.

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Ion and water transport phenomena in the polymer electrolyte plays a significant role in the energy conversion process of a polymer electrolyte membrane (PEM) fuel cell. A mathematical model for ion and water transport in the polymer electrolyte is presented, based on non-equilibrium thermodynamics and the Generalized Stefan-Maxwell equations. The physical constants of the model, such as the binary diffusion coefficients of the Generalized Stefan-Maxwell equations, are obtained from published, experimental data for membrane water diffusion and conductivity. The electrolyte transport model is incorporated into a model of an entire PEM fuel cell; water transport in the electrolyte and gas phase are coupled and solved in a single domain.

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Duda, John C., Timothy S. English, William A. Soffa, Donald A. Jordan e Pamela M. Norris. "Role of Chemical Ordering on Phononic Transport in Binary Alloys". In ASME/JSME 2011 8th Thermal Engineering Joint Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/ajtec2011-44160.

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Many random substitutional solid solutions (alloys) will display a tendency to chemically order given the appropriate kinetic and thermodynamic conditions. Such order-disorder transitions will result in major crystallographic reconfigurations, where the atomic basis, symmetry, and periodicity of the alloy change dramatically. Consequently, phonon behavior in these alloys will vary greatly depending on the type and degree of ordering achieved. To investigate these phenomena, the role of the order-disorder transition on phononic transport properties of Lennard-Jones type binary alloys is explored via non-equilibrium molecular dynamics simulations. Particular attention is paid to regimes in which the alloy is only partially ordered. It is shown that, through exploitation of the long-range order parameter, thermal conductivity of binary alloys can be effectively tuned across half an order of magnitude at low-to-moderate temperatures.

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Guo, Hang, Chong Fang Ma, Mao Hai Wang, Jian Yu, Xuan Liu, Fang Ye e Chao Yang Wang. "Heat and Mass Transfer and Two Phase Flow in Hydrogen Proton Exchange Membrane Fuel Cells and Direct Methanol Fuel Cells". In ASME 2003 1st International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2003. http://dx.doi.org/10.1115/fuelcell2003-1755.

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Fuel cells are related to a number of scientific and engineering disciplines, which include electrochemistry, catalysis, membrane science and engineering, heat and mass transfer, thermodynamics and so on. Several thermophysical phenomena such as heat transfer, multicomponent transport and two phase flow play significant roles in hydrogen proton exchange membrane fuel cells and direct methanol fuel cells based on solid polymer electrolyte membrane. Some coupled thermophysical issues are bottleneck in process of scale-up of direct methanol fuel cells and hydrogen proton exchange membrane fuel cells. In present paper, experimental results of visualization of condensed water in fuel cell cathode microchannels are presented. The equivalent diameter of the rectangular channel is 0.8mm. Water droplets from the order of 0.08mm to 0.8mm were observed from several different locations in the channels. Several important problems, such as generation and change characteristics of water droplet and gas bubble, two phase flow under chemical reaction conditions, mass transfer enhancement of oxygen in the cathode porous media layer, heat transfer enhancement and high efficiency cooling system of proton exchange membrane fuel cells stack, etc., are discussed.

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Ahuja, V., A. Hosangadi e J. Shipman. "Computational Analyses of Cavitating Control Elements in Cryogenic Environments". In ASME 2004 Heat Transfer/Fluids Engineering Summer Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/ht-fed2004-56377.

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The safe and reliable operation of high pressure test stands for rocket engine and component testing places an increased emphasis on the performance of control valves and flow metering devices. In this paper, we present high fidelity computational analyses of cavitating venturi-type cryogenic control valves used to support rocket engine and component testing. The computational analyses are carried out with a generalized multi-phase formulation for cavitation in fluids operating in regimes where thermodynamic effects become important. The thermal effects and the accompanying property variations due to phase change are modeled rigorously. Thermal equilibrium is assumed and fluid thermodynamic properties are specified along the saturation line using the NIST-12 databank. The thermodynamic cavitation framework has been validated against experimental data of Hord [1] for hydrofoils operating in liquid nitrogen and liquid hydrogen. In this paper, we will discuss performance losses related to cryogenic control valves and provide insight into the physics of the dominant multi-phase fluid transport phenomena that are responsible for the choking like behavior of cryogenic control elements.

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Yang, Xiaofan, e Z. Charlie Zheng. "Continuum/Nano-Scale Simulation of Surface Diffusion Process in Flow". In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-62960.

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Fluid transport with diffusion through micro-/nano-channels is found in many natural phenomena and industrial processes, including fluid transport or diffusion through nano-materials, molecular/atomistic transfer across nuclear pores or in the MEMS devices among other applications. Those nano-pores can be treated as nano-channels in the thin layers of the membranes. The transport phenomena of fluid in such small confined channels, usually in the size of ten molecular diameters or less, differs significantly from its bulk behaviors and cannot be described with continuum theory. In this case, molecular dynamics (MD) simulation, rather than continuum methods, is better suited to study the phenomena. The surface diffusion, related to both the fluid and solid material properties and the flow rate, can be used as a parameter for estimating the adsorbing capacity of a porous nano-material. The transport of fluids through porous materials occurs mainly by diffusion. In this study, a molecular-continuum hybrid scheme is used for the study of the diffusion in a representative Couette flow problem. By varying the velocity of the moving-solid wall, we investigated the effect of the shearing condition on the mass flux going through the pores. The relationship of the physical mechanisms and the transport phenomena (e.g. Fick’s law) were then linked among the different length scales. Activated carbon with its high surface area has been emerging as a promising candidate for an adsorbent due to not only its stable thermodynamic and mechanical properties but also its homogenous and isotropic porous distribution and relatively even pore size. In this study, we focus on the characteristics of the permeation and the adsorption process between different gases and the carbon substrate under various shearing conditions. The investigation of the diffusion process of fluids through the pores of the nano-materials has become an interesting topic in recent decades. This investigation has been divided into two major areas: 1) the diffusivity estimation and 2) the transient diffusion rate. We apply a continuum/MD hybrid scheme to a model problem of various gases transport through a carbon substrate with several pores in a channel flow under different shear rates. Instead of inserting and deleting particles from the control volumes used in the DCV-GCMD method, we keep the number of particles in the simulation system constant. The interactions between fluid/fluid, fluid/solid and solid/solid are all assumed to be under Lennard-Jones potentials. In the modeled Couette flow, the two solid walls are constructed with nano-pores that allow fluids to go through the substrate to study the transient diffusion rate (flux). Before simulating the fluid transport through the nano-pores, we need to validate the natural diffusion properties of the bulk fluid. To do this, a system (as a cube) consisting of pure liquid argon molecules is used to perform the pure MD simulation. The radial distribution function (RDF) is used as the parameter to verify the natural diffusion of the liquid argon fluid in the bulk flow, which is a structural correlation. It describes the spherically averaged local organization around any given molecule. Figure 1 shows a good comparison of the radial distribution functions between the MD prediction and the experimental measurement of Eisenstein and Gingrich (1942). By comparing our calculation to Wu et al. (2008) under similar circumstances, we found that the average (from 8 pores) and corrected mass flux J · (RTh) is linearly proportional to the average pressure gradient along the pore. And the slope of this relationship is the transport diffusivity, which is 4.6 × 10−7m2/s under 273K and 4.9 × 10−7m2/s under 300K. This indicates that the current simulation follows the Fick’s law exactly. Similarly, for other gases, the same linear relationships can also be obtained. These calculations are listed in Table 1 that shows the transport diffusivity increases with temperature. The mass fluxes of three gases at various pore widths are calculated as shown in Fig. 2. Generally, with larger pores, the mass fluxes increase. However, among three gases, the increase of H2 is much faster than the other two gases because of hydrogen’s smaller molecular size. In another word, smaller molecules as H2 have faster diffusion rates during the adsorption process.

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Acharya, Tathagata, e Ram V. Devireddy. "Intracellular Ice Formation in Cell Suspensions Measured Using a Cryomicroscope and a Calorimeter". In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41308.

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Injury to biological cells during the freezing-thawing process of a cryopreservation protocol is related to the thermodynamic state of the intracellular water. The two primary biophysical phenomena are water transport and intracellular ice formation (IIF). Unfortunately, there is no technique currently available to measure IIF in the cells of opaque tissue sections. In this proceeding we report the use of a calorimeter to assess IIF in two different cell suspensions, adult stem cells and pacific oyster embryos. The close agreement between the IIF data obtained using the calorimetric data with corresponding data obtained using a well-established cryomicroscopy technique validated the calorimetric method. Since, the calorimetric measurements are independent of shape and size, it is ideally suited to measure IIF in opaque tissue sections; the focus of future studies.

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Humphries, Larry, Brad Beeny, David Louie, Hossein Esmaili e Michael Salay. "Non-LWR Model Development for the MELCOR Code". In 2018 26th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/icone26-82415.

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MELCOR is a fully-integrated, system-level computer code developed by Sandia National Laboratories (SNL) for the Nuclear Regulatory Commission (NRC) with the primary objective of modeling the progression of severe accidents in light water nuclear power plants [1,2,3]. Since the project began in 1982, MELCOR has undergone continuous development to address emerging issues, process new experimental information, and create a repository of knowledge on severe accident phenomena. This paper summarizes model development specifically developed for non-LWR applications such as high temperature gas reactors (HTGR), sodium fast reactors (SFR) and molten salt reactors (MSR). Beginning in 2008, active development work began on HTGR modeling in MELCOR. Models were developed for helium gas thermodynamics, oxidation of graphite, thermal hydraulics and heat transfer for both prismatic and pebble bed designs, cavity cooling systems, fuel failure and fission product release, graphite dust generation, and aerosol transport, deposition, and resuspension. In 2013, work commenced on the development of modeling capabilities for sodium fast reactors. This development included the addition of sodium as a working fluid as well as the addition of models for simulating containment fires (both spray and pool) as well as sodium atmospheric chemistry. Validation of these new models has been completed and code-to-code comparisons with the CONTAIN/LMR code has been performed. Work continues as development of sodium concrete interaction models is now underway. In 2017, work began on adding capabilities for molten salt reactors. A new equation of state for FLIBE coolant has been successfully tested in MELCOR and is now undergoing validation against experiments. The alternate working fluid model has also been extended to permit both water and one alternate condensable working fluid in the same input model.

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Beil, Alexander, e Joerg R. Seume. "Unsteady Performance of a PEMFC System Including Autothermal Methane Reforming". In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97008.

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A zero-dimensional, dynamic model of a PEM fuel cell with an autothermal methane reformer section is generated. In the model, reformer consists of three reactors for the autothermal steam reforming, the water gas shift, and the selective oxidation. Physical approaches are favored over empirical modeling equations in order to describe the relevant transport phenomena. Thus, in spite of the low order modeling, only physical parameters are required for the input. The aim of the model is the calculation of the cell voltage for a given set of geometrical and thermodynamic data including the current density. The fuel cell water management is modeled with equations for the water transport through the membrane by electro-osmotic drag and diffusion as well as the membrane humidity. Flooding due to liquid water content and dehydration of the membrane is simulated dynamically with this model. These critical conditions are identified by the cell voltage. Due to pressure feedback, dynamic simulations show partial pressure fluctuation in the reformer reactors caused by load changes of the fuel cell.

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Rapporti di organizzazioni sul tema "Transport Phenomena Engineering Thermodynamics"

Myint, P. Transport Phenomena and Thermodynamics in Subsurface Carbon Sequestration and Improved Oil Recovery. Office of Scientific and Technical Information (OSTI), giugno 2015. http://dx.doi.org/10.2172/1735806.

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