Готові списки джерел за темами / Solidification systems

Добірка наукової літератури з теми "Solidification systems"

Автор: Grafiati
Опубліковано: 6 вересня 2023

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Статті в журналах з теми "Solidification systems"

1

Boussinot, G., C. Hüter, R. Spatschek, and E. A. Brener. "Isothermal solidification in peritectic systems." Acta Materialia 75 (August 2014): 212–18. http://dx.doi.org/10.1016/j.actamat.2014.04.055.

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2

Podolinsky, V. V., Yu N. Taran, and V. G. Drykin. "Eutectic solidification in organic systems." Journal of Crystal Growth 74, no. 1 (January 1986): 57–66. http://dx.doi.org/10.1016/0022-0248(86)90248-4.

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3

Chen, Ming, Yu Jiang, Wen Long Sun, Xiao Dong Hu, and Chun Li Liu. "Numerical Simulation of Binary Alloy Crystal Growth of Multiple Dendrites and Direcitonal Solidification Using Phase-Field Method." Advanced Materials Research 774-776 (September 2013): 703–6. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.703.

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Phase field method (PFM) offers the prospect of carrying out realistic numerical calculation on dendrite growth in metallic systems. The dendritic growth process of multiple dendrites and direcitonal solidification during isothermal solidifications in a Fe-0.5mole%C binary alloy were simulated using phase field model. Competitive growth of multiple equiaxed dendrites were simulated, and the effect of anisotropy on the solute segregation and microstructural dedritic growth pattern in directional solidification process was studied in the paper. The simulation results showed the impingement of arbitrarily oriented grains, and the grains began to impinge and coalesce the adjacent grains with time going on, which made the dendrite growth inhibited obviously. In the directional solidification, the maximum concentration gradient showed in the dendrite tip, and highest solute concentration existed at the bottom of the dendrites. With the increasing of the anisotropy, dendrite tip radius became smaller, and the crystal structure is more uniform and dense.
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4

Lutsyk, Vasily, Anna Zelenaya, and Maria Parfenova. "Solidification Paths within the Ceramic Systems." Advanced Materials Research 704 (June 2013): 173–78. http://dx.doi.org/10.4028/www.scientific.net/amr.704.173.

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The aim of this work is to assemble the computer models of phase diagrams (PD) for the typical ternary systems and to examine the processes of crystallization on its base. Spatial schemes of mono-and invariant equilibria have been used for it. Analysis of concentration fields, obtained by the projection of the surfaces on the Gibbs triangle, allows establish the boundaries of phase regions (located above the considered fields), the sequence of phase transformations and microstructural elements for the solidification of the initial melt at equilibrium condition. Concentration fields have been analyzed by means of mass balances for their centers of masses. Based on this technology, the research identifies concentration fields with coinciding sets of phase reactions and microconstituents, and the fields with individual characteristics.
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5

Korojy, B., L. Ekbom, and H. Fredriksson. "Microsegregation and Solidification Shrinkage of Copper-Lead Base Alloys." Advances in Materials Science and Engineering 2009 (2009): 1–9. http://dx.doi.org/10.1155/2009/627937.

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Microsegregation and solidification shrinkage were studied on copper-lead base alloys. A series of solidification experiments was performed, using differential thermal analysis (DTA) to evaluate the solidification process. The chemical compositions of the different phases were measured via energy dispersive X-ray spectroscopy (EDS) for the Cu-Sn-Pb and the Cu-Sn-Zn-Pb systems. The results were compared with the calculated data according to Scheil's equation. The volume change during solidification was measured for the Cu-Pb and the Cu-Sn-Pb systems using a dilatometer that was developed to investigate the melting and solidification processes. A shrinkage model was used to explain the volume change during solidification. The theoretical model agreed reasonably well with the experimental results. The deviation appears to depend on the formation of lattice defects during the solidification process and consequently on the condensation of those defects at the end of the solidification process. The formation of lattice defects was supported by quenching experiments, giving a larger fraction of solid than expected from the equilibrium calculation.
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6

Zhu, Shuangchun, and Biao Yan. "Effects of Cerium on Weld Solidification Crack Sensitivity of 441 Ferritic Stainless Steel." Metals 9, no. 3 (March 22, 2019): 372. http://dx.doi.org/10.3390/met9030372.

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The addition of rare earth element Ce in ferritic stainless steel can improve the high temperature performance to meet the service requirements of automobile exhaust systems at high temperatures. Automobile exhaust systems are generally applied as welded pipes, so it is necessary to study the effect of Ce on the weldability of ferritic stainless steel. In this study, the Trans-varestraint test method was used to test the solidification crack sensitivities of 441 and 441Ce ferritic stainless steel. The 441Ce steel, which has added Ce, showed poor resistance to weld solidification cracking. Using Thermo-Calc software, Ce was observed to expand the solidification temperature range of 441 ferritic stainless steel, increase the time for solid–liquid coexistence during solidification, and increase the sensitivity of solidification cracking. Further, from scanning electron microscopy and energy dispersive spectrometer analysis, the addition of Ce was found to reduce high temperature precipitation (Ti,Nb)(C,N), reduce or even eliminate the “pinning” effect during solidification, and increase solidification crack sensitivity of 441 ferritic stainless steel.
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7

Fukusako, Shoichiro, and Masahiko Yamada. "Solidification of Pure Liquids and Liquid Mixtures Inside Ducts and Over External Bodies." Applied Mechanics Reviews 47, no. 12 (December 1, 1994): 589–621. http://dx.doi.org/10.1115/1.3111067.

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Recent advances in the understanding of transport phenomena during solidification inside ducts and over external bodies are discussed. The emphasis is on fundamental aspects of the phenomena observed in transport processes during solidification. After a discussion of the solidification of pure substances, transport processes during solidification of binary systems are reviewed. The important role played by fluid motion owing to density gradients is also discussed and future research needs are assessed.
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8

Yoshioka, Hideaki, Tomoaki Kyoden, and Tadashi Hachiga. "Sound velocity during solidification in binary eutectic systems." Journal of Applied Physics 122, no. 22 (December 12, 2017): 225109. http://dx.doi.org/10.1063/1.5001893.

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9

Alexandrov, D. V. "Nonlinear dynamics of solidification in three-component systems." Doklady Physics 53, no. 9 (September 2008): 471–75. http://dx.doi.org/10.1134/s1028335808090024.

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10

Swaminathan, C. R., and V. R. Voller. "Towards a general numerical scheme for solidification systems." International Journal of Heat and Mass Transfer 40, no. 12 (August 1997): 2859–68. http://dx.doi.org/10.1016/s0017-9310(96)00329-8.

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Дисертації з теми "Solidification systems"

1

Verma, Sudeep. "Computational study of phase change and melt turbulence using PANS modelling in solidification systems." Thesis, IIT Delhi, 2019. http://eprint.iitd.ac.in:80//handle/2074/8054.

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2

Mehrle, Yvonne E. "Solidification and contraction of confectionery systems in rapid cooling processing." lizenzfrei, 2007. http://e-collection.ethbib.ethz.ch/view/eth:30497.

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3

Alcantara-Ortega, Elena. "Alkali-activated clinoptilolite, properties and use in solidification/stabilisation systems." Thesis, Imperial College London, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397147.

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4

Meco, Halim. "Solidification at the High and Low Rate Extreme." Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2004. http://www.osti.gov/servlets/purl/835376-9UiMWH/webviewable/.

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5

Aboutalebi, M. Reza. "Modelling of turbulent transport phenomena and solidification in continuous casting systems." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41514.

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A numerical modelling study has been undertaken to analyze transport phenomena in various steel casters. During the course of this work, a general three-dimensional parabolic heat flow model was developed for casters of arbitrarily shaped mould using a body-fitted coordinate transformation technique. The heat flow model was specifically applied to a beam blank caster as well as to an industrial slab caster of regular rectangular cross section, so as to analyze solidification within casters.
Furthermore, a fully coupled turbulent flow and solidification model was developed to describe the turbulent transport processes in the upper part of a steel slab caster as well as to evaluate the process variables affecting the casting. Solidification modelling was carried out using a fixed grid enthalpy method while the mushy zone was modelled based on a Darcy-porosity approach. A modified low-Reynolds number version of the $ kappa$-$ epsilon$ model of turbulence was employed to calculate eddy viscosity within the liquid and mushy regions. A control volume based on finite difference method was used to solve the transport equations, wherein a SIMPLER algorithm was adopted to resolve the velocity-pressure coupling in the momentum equations. In order to verify the turbulent flow model, a water modelling study was performed for fluid flow in the mould region of a slab caster. Reasonable agreement was obtained between the mathematical model's predictions, and water modelling experiments.
Macrosegregation of carbon in a steel billet caster was also modelled based on a continuum formulation, in which the conservation equations are derived in terms of mixture dependent variables. The effect of turbulence on the transport of solute in the liquid and mushy regions was taken into account using the $ kappa$-$ epsilon$ model adopted in this work.
Various parametric studies have been preformed on different casting systems, and their effects on temperature distributions and velocity fields within the strand, solidification profiles, and trajectories of inclusions were predicted. Typical predicted results of the models have been compared against the experimental measurements on operating casters reported in the literature and relatively good agreement was obtained.
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Ahmad, Nasir. "Numerical simulation of transport processes in multicomponent systems related to solidification problems /." [S.l.] : [s.n.], 1995. http://library.epfl.ch/theses/?nr=1349.

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7

Shuleshova, Olga. "Equilibrium and metastable solidification in Ti-Al-Nb and Al-Ni systems." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-38636.

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The presented work reports on the solidification studies in two alloy systems: the niobium bearing γ-TiAl, relevant for the automotive and aero-engine applications, and aluminium rich Raney-Ni, precursor alloys for catalyses used in the chemical industry. The time-resolved observations of equilibrium liquid-solid phase transformations, as well as non-equilibrium solidification from the undercooled melt, are performed by combination of in situ structural studies using high-energy X-rays at a synchrotron source and the electromagnetic levitation technique. Containerless processing assured the contamination-free environment leading to high undercooling levels even at moderate cooling rates. For the critical part of the Ti-Al-Nb phase diagram an equilibrium involving the liquid phase is deduced from the phase transformations gathered on heating periods of levitation experiment. New experimental data on the partial liquidus and solidus surfaces are delivered as well as the information on the nature of the reactions along the univariant lines. These data provide a valuable contribution to the reassessment of the thermodynamic description. The primary phase selection as function of undercooling is studied in ternary Ti-Al-Nb alloys. The metastable formation of the cubic β phase within the primary solidification region of the hexagonal α phase is observed with increasing melt undercooling. Furthermore, the microstructure evolution of the β solidifying Ti-46Al-8Nb alloy discloses the transition to the thermal growth mode for ∆T>200−250 K, accompanied by complete solute trapping. Supplemented with the data on the solidification velocity determined as function of melt undercooling, this results are discussed within the local non-equilibrium model of the free dendrite growth. The in situ observations of the non-equilibrium solidification of the binary Al-Ni system give insight into multiple phase transformation sequence. The achieved undercooling levels up to 320 K for the aluminium alloys containing 18–31.5 at.% Ni did not alter the primary phase selection. However, during further cooling of L+Al3Ni2 semisolid samples the peritectic formation of a metastable decagonal quasicrystalline phase is observed providing a critical undercooling below the peritectic temperature of Al3Ni phase is reached. On further cooling the metastable phase subsequently transforms into the equilibrium Al3Ni. A similar solidification pathways are expected for the Raney-Ni alloys produced by gas atomisation, where the associated high cooling rates allowed to retain the metastable phase at room temperature.
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8

Iyengar, S. R. "Application of two novel magnesia-based binders in stabilisation/solidification treatment systems." Thesis, University of Cambridge, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.604975.

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Portland cements (PC) and blended PCs are the most commonly used binders in stabilisation/solidification (S/S) applications. However, such systems have found limited suitability with organic contaminants. Moreover, the high alkalinity associated with PC militates against the soil microbes and hence, hinders the natural attenuation of the organics. Furthermore, the production of PC is not only an extremely resource and energy intensive process but also has significant negative environmental impacts. Thus, with the aim of tackling the above issues, this research has been focused on firstly developing and applying a low-pH binder system for facilitating microbial activity in parallel to the S/S of heavy metals, and additionally on investigating the application of less environmentally damaging cement in S/S. These were addressed employing two novel binders; viz. low pH magnesia phosphate cements (MPCs) and reactive magnesia (MgO) cements respectively. This study was successful in formulating MPC mixes which not only developed low-pH ranges favourable to soil microbes but were also more effective in immobilising heavy metals than PC-based binders in an individual contamination scenario. Furthermore, the heavy metal stabilisation performance of the MPC mixes suffered negligible impact in the presence of organic contaminant.
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9

Juarez-Hernandez, Arturo. "Growth temperature measurements and solidification microstructure selection in Al-Ni and Al-lanthanide systems." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301607.

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10

Berry, Joel. "Liquid-solid systems out of equilibrium: phase-field crystal studies of solidification, melting, and plasticity." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106330.

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Dynamic processes in nonequilibrium liquid-solid systems are studied over mesoscopic time scales and atomistic length scales using phase-field crystal (PFC) models. Various freezing and melting transitions are examined in two and three dimensions, and microscopic phenomena responsible for solid-phase plasticity are investigated. A primary focus is on the issue of describing atomistic dynamics over time scales that are generally inaccessible to conventional approaches. Glass forming dynamics in supercooled liquids near a glass transition are studied numerically, and the central features of the transition, including a number of behaviors previously undemonstrated within PFC / classical density functional theory simulations, are successfully reproduced. A connection between the liquid dynamic correlation length and transition fragility is identified, and a physically motivated time scaling applied to the simulation data is shown to generate qualitative agreement with basic glass transition phenomenology across 12 orders of magnitude in time. The competing processes of amorphous precursor nucleation and crystallization in diffusion-dominated spinodal and non-spinodal simple liquids are also examined. Melting and premelting transitions in defected body-centered cubic solids are studied numerically, and a localized melting theory based on defect elastic energies is formulated. Basic features of the dynamic phase separation patterns that develop in growing heteroepitaxially strained alloy films are also outlined based on numerical simulations of a binary PFC model. Finally, dislocation dynamics are examined in strained periodic systems. The central features of dislocation glide, climb, and annihilation are shown to naturally emerge within PFC models, and the dynamics of individual dislocations are found to reduce to a simple generalized equation of motion.
Des procédés dynamiques dans des systèmes liquide-solide non-équilibrés sont étudiés au cours d'échelles de temps mésoscopiques et d'échelles de longueur atomistiques en utilisant des modèles « phase-field crystal » (PFC). Diverses transitions de congélation et de fusion sont examinées en deux et trois dimensions, et les phénomènes microscopiques responsables de la plasticité des phases solides sont étudiées. Un accent est mis sur la problématique des dynamiques atomistiques au cours d'échelles de temps qui sont généralement inaccessibles aux approches conventionnelles. Les dynamiques de formation vitreuse dans les liquides metastables surfondus près d'une transition vitreuse sont étudiés numériquement, et les caractéristiques centrales de la transition, y compris un certain nombre de comportements qui n'ont pas été démontrées précédemment par les modèles PFC / simulations de la théorie classique densité fonctionnelle, sont reproduites avec succès. Un lien entre la longueur de corrélation dynamique liquide et la fragilité est identifié, et il est démontré par une normalisation de temps physiquement motivé, appliquée aux données de simulation, qu'il y a une correspondance qualitative avec des bases phénomènes de transition vitreuse sur 12 ordres de grandeurs de temps. Les procédés concurrentiels de la nucléation de précurseurs amorphes et de la cristallisation dominées par la diffusion dans les liquides simples spinodaux et non-spinodaux sont aussi examinés. Les transitions de fusion et pré-fusion dans des solides cubiques centrés ayant des défauts sont étudiés numériquement, et une théorie de fusion localisée basée sur les énergies élastiques des défauts est formulée. Des caractéristiques de base des motifs de la séparation de phase dynamique qui se développent pendant la croissance des films tendus heteroepitaxiellement sont également etudiés en utilisant des simulations numériques d'un modèle binaire PFC. Enfin, les dynamiques des dislocations sont examinées dans les systèmes périodiques tendus, ainsi il est démontré que les caractéristiques fondamentales des procédés de glisse, d'escalade, et d'annihilation émergent naturellement des modèles PFC.
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Книги з теми "Solidification systems"

1

E, Loper David, ed. Structure and dynamics of partially solidified systems. Dordrecht: Martinus Nijhoff Publishers, 1987.

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2

G, Collins F., Aumalis A. E, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Branch., eds. An exact solution for the solidification of a liquid slab of binary mixture. [Washington, D.C.]: National Aeronautics and Space Administration, Scientific and Technical Information Branch, 1986.

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3

Newberry, Conrad Stephen. The effect of two 'suitable' toxic wastes commonly used in cement-based solidification on a range of cement/pozzolanic binder systems. [London]: Queen Mary and Westfield College, 1994.

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4

A, Curreri Peter, and George C. Marshall Space Flight Center., eds. Cellular solidification in a monotectic system: Center director's discretionary fund final report. [Marshall Space Flight Center, Ala.]: National Aeronautics and Space Administration, George C. Marshall Space Flight Center, 1987.

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5

Habtemichael, Yebio. Effects of arsenic on the solidification of ternary eutectic matte in the Ni-Cu-S system. Sudbury, Ont: Laurentian University, School of Engineering, 1998.

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6

Vislocky, Michael. Nonlinear stability analysis of an interfacial model equation for alloy solidification in the presence of an electric field. 1988.

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7

Demonstration of the Geodur Solidification/Stabilisation System. Construction Industry Research & Information Association (CIRIA), 2000.

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8

A simple inexpensive Bridgman-Stockbarger crystal growth system for organic materials. [Washington, DC: National Aeronautics and Space Administration, 1996.

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Частини книг з теми "Solidification systems"

1

Aitta, A., H. E. Huppert, and M. G. Worster. "Solidification in Ternary Systems." In Interactive Dynamics of Convection and Solidification, 113–22. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-9807-1_14.

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2

Hoyer, Walter, Ivan Kaban, and Markus Merkwitz. "Liquid-Liquid Interfacial Tension and Wetting in Immiscible Al-Based Systems." In Solidification and Crystallization, 110–18. Weinheim, FRG: Wiley-VCH Verlag GmbH & Co. KGaA, 2005. http://dx.doi.org/10.1002/3527603506.ch13.

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3

Rappel, W. J. "Patterns in Directional Solidification." In Nonlinear Structures in Physical Systems, 68–73. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4612-3440-1_6.

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4

Heiden, Bernhard, and Bianca Tonino-Heiden. "Emergence and Solidification-Fluidisation." In Lecture Notes in Networks and Systems, 845–55. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-82199-9_57.

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5

Voller, V. R. "Effect of Solidification Morphology on the Macroscopic Behavior of Solidification Systems." In Interactive Dynamics of Convection and Solidification, 191–93. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2809-4_30.

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6

Willett, R. L. "Electron Solidification in Two Dimensions." In Phase Transitions and Relaxation in Systems with Competing Energy Scales, 367–99. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-1908-5_18.

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7

Hellawell, Angus. "Measurements of Liquid Diffusion Coefficients in Transparent Model Systems." In Interactive Dynamics of Convection and Solidification, 59–66. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-015-9807-1_8.

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8

Levine, H. "Alloy Solidification as a Nonquilibrium Pattern-Forming Systm." In Nonlinear Structures in Physical Systems, 50–55. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4612-3440-1_4.

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9

Cladis, P. E., J. T. Gleeson, and P. L. Finn. "Wavelength Selection and Hidden Ramps in Directional Solidification." In Nonlinear Structures in Physical Systems, 56–67. New York, NY: Springer New York, 1990. http://dx.doi.org/10.1007/978-1-4612-3440-1_5.

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10

Thompson, M. E., and J. Szekely. "Double Diffusive Convection during Solidification at a Vertical Wall." In Structure and Dynamics of Partially Solidified Systems, 59–77. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3587-7_4.

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Тези доповідей конференцій з теми "Solidification systems"

1

Iglesias, Raúl Benı́tez. "Transients and fluctuations in directional solidification." In Modeling complex systems. AIP, 2001. http://dx.doi.org/10.1063/1.1386845.

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2

Rimbert, Nicolas, M. Hadj-Achour, and M. Gradeck. "Liquid-Liquid Secondary Fragmentation with Solidification." In ILASS2017 - 28th European Conference on Liquid Atomization and Spray Systems. Valencia: Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/ilass2017.2017.5034.

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In the event of a hypothetical core disruptive accident in nuclear power plants, the molten core may flow out thereactor vessel and interact with the cold water. The evolution of the accident is strongly affected by the fragmentation of the jet of molten metallic fuel due to its interaction with the water (i.e. this situation is known as fuel coolant interaction, FCI). In order to evaluate and predict the various consequences of a FCI, many researches are conducted with either corium or high melting temperature molten metal, where premixing stage evolves with an important production of steam. This steam production that is unavoidable because the high temperature of corium leads to difficulties for using optical diagnostics. Hence, in our case, we use a eutectic alloy (Field’s metal) with a low melting point (62°C) in order to be able to visualize correctly the droplet fragmentation processes.The present work focuses on the fragmentation of a single Field’s metal liquid droplet with mass equals to 0.27g (±0.01g). The liquid droplet interacts with a water pool whose temperature range between 20°C to 60°C. According to its Weber number, it fragments in different ways. For each experiment, a single droplet has been visualized using a high-speed camera (at 8000 fps). All measurements (drop size, velocity, impact parameter and geometrical properties of the drops after the penetration) into the pool are evaluated using an open source image processing. Solidified fragments can then be sieved and the size PDF determined. Focus of the present work is put on the evolution of the Sauter Mean Diameter with increasing Weber number and varying bath pool temperature. It is shown that using a simple crust model during solidification and defining an effective Weber number which include the crust elasticity all the curves collapse on the same master curve for all the water bathtemperature considered.DOI: http://dx.doi.org/10.4995/ILASS2017.2017.5034
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Kavousi, Sepideh, and Dorel Moldovan. "Phase Field Modeling of Solidification in Single Component Systems." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-71921.

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Using phase field modeling simulation approach we investigate the effect of various parameters on the primary and secondary dendrite arm spacing during directional solidification in a single component system. In previous studies the effect of temperature gradient was assumed to be negligible in the transversal directions with a temperature rate equal to the product of thermal gradient and solidification rate. In our study the temperature field is obtained from energy conservation equation by considering the balance of latent heat released in the regions where solidification occurs and energy dissipation due to directional temperature gradient as boundary condition. In our simulations, we implemented a numerical method that enables the investigation of solidification in larger domains. Specifically, the temperature and the order parameter equations are solved only in the domains close to the solidification front; approach that reduces the computational costs significantly. We investigate the interplay and the effect of thermal gradient, solidification rate, undercooling temperature, and the cooling heat flux on arm spacing. By using a well-established power law relation the primary and secondary arm spacing are calculated for various solidification parameters. We also show that, for large heat fluxes, the secondary arm spacing is almost constant for different undercooling temperatures; behavior that demonstrates the need for correction of the power law relation by including the effect of heat flux.
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Okamoto, Kei, and Ben Q. Li. "Inverse Design of Solidification Processes." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-59449.

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An inverse algorithm is developed for the design of the solidification processing systems. The algorithm entails the use of the Tikhonov regularization method, along with an appropriately selected regularization parameter. Both the direct solution of moving boundary problems and the inverse design formulation are presented, along with the L-curve to select an optimal regularization parameter for inverse design calculations. The design algorithm is applied to determine the appropriate boundary heat flux distribution in order to obtain a unidirectional solidification front in a 2-D cavity by eliminating the effect of natural convection. Inverse calculation is also performed for the case in which the solid-liquid interface is prescribed to vary linearly. The L-curve based regularization method is found to be reasonably accurate for the purpose of designing solidification processing systems.
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5

Okamoto, Kei, and Ben Q. Li. "Inverse Design of Time Dependent Solidification Processes." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72556.

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Анотація:
An inverse algorithm is developed for the design of the solidification processing systems. The algorithm entails the use of the Tikhonov regularization method, along with an appropriately selected regularization parameter. Both the direct solution of moving boundary problems and the inverse design formulation are presented, along with the L-curve method to select an optimal regularization parameter for inverse design calculations. The design algorithm is applied to determine the optimal boundary heat flux distribution in order to obtain a unidirectional solidification front moving at a constant velocity in a 2-D cavity by eliminating the effect of natural convection. The inverse calculation is also performed for the case in which the solid-liquid interface is prescribed to vary with sine functions. The L-curve based regularization method is found to be reasonably accurate for the purpose of designing time dependent solidification processing systems.
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6

Al-Aiderous, Abdullah Younis. "Unlocking Drag Reducing Agent Systems Potential Using Data Analysis." In ADIPEC. SPE, 2022. http://dx.doi.org/10.2118/211299-ms.

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Abstract The objective of this paper is to showcase the successful and innovative troubleshooting data analysis techniques to operate a Drag Reducing Agent system optimally, minimizing Drag Reducing Agent Losses and unlocking Drag Reducing Agent system's potential to increase facility throughput through pipelines. Drag Reducing Systems have recently received widespread industry adoption in various applications such as debottlenecking pipelines constraints, increase facility throughput and elimination of costly CAPEX. These proven data analysis techniques were used to tackle major and chronic issues associated with Drag Reducing Agents systems operation that led to excessive Drag Reducing Agent losses, Drag Reducing Agent system solidification and reduction in facility throughput and production. Drag Reducing Agent loss and solidification associated with system storage, handling and improper operations is the most important operating problem in the Drag Reducing Agent system and it represents a concern to the operation personnel. There are various types of Drag Reducing Agents classified by the type of carrier, each individual agent has its unique handling requirements and most optimum pipeline service usage. In this paper, comprehensive data analysis of the potential root causes that aggravate undesired drag reducing agent losses, solidification and reduced throughput will be discussed along with solutions to minimize the expected impact. For example, operating the Drag Reducing Agent system at high temperature will increase the agent losses by solidification. In addition, improper agent circulation at the storage facility results in a reduction in agent efficiency as a result of carrier disengagement. This paper will focus on a detailed case study in one of the running Drag Reducing Agent systems at a gas-oil separation plant.
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Avinash, Agnihotram, and Lanka Sandeep Raj. "Development of numerical model for centrifugal casting solidification." In 2022 International Conference on Recent Trends in Microelectronics, Automation, Computing and Communications Systems (ICMACC). IEEE, 2022. http://dx.doi.org/10.1109/icmacc54824.2022.10093385.

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Li, YIng, Yingying Zhai, Haicheng Xu, and Zhiguang Ao. "Computer Simulation of Solidification Heat Transfer in Continuous Casting Bloom." In 2010 Second Global Congress on Intelligent Systems (GCIS). IEEE, 2010. http://dx.doi.org/10.1109/gcis.2010.91.

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9

Crepeau, John C., and Ali Siahpush. "Effects of Internal Heat Generation on Solidification." In ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems. ASMEDC, 2005. http://dx.doi.org/10.1115/ht2005-72079.

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We present solutions for solid-liquid phase change in materials that generate internal heat. This problem is solved for both cylindrical and semi-infinite geometries. The analysis assumes a temperature profile in the solid phase and constant temperature boundary conditions on the exposed surfaces. We derive differential equations governing the solidification thickness for both geometries as functions of the Stefan number and the internal heat generation (IHG). For the cylindrical geometry, the solidification layer obtains a steady-state value which is related to the inverse of the square root of the IHG. The solutions to the semi-infinite geometry problem show that when the surface is cooled to below the freezing point, a solidification layer forms along the edge and begins to grow until it reaches a maximum, then begins remelt.
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Ol'khovik, E. O., A. A. Butsanets, and A. A. Ageeva. "Use of the distributed computing at the castings solidification simulation." In 2015 International Conference on Mechanical Engineering, Automation and Control Systems (MEACS). IEEE, 2015. http://dx.doi.org/10.1109/meacs.2015.7414905.

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Звіти організацій з теми "Solidification systems"

1

Allen, Jeffrey, Robert Moser, Zackery McClelland, Md Mohaiminul Islam, and Ling Liu. Phase-field modeling of nonequilibrium solidification processes in additive manufacturing. Engineer Research and Development Center (U.S.), December 2021. http://dx.doi.org/10.21079/11681/42605.

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This project models dendrite growth during nonequilibrium solidification of binary alloys using the phase-field method (PFM). Understanding the dendrite formation processes is important because the microstructural features directly influence mechanical properties of the produced parts. An improved understanding of dendrite formation may inform design protocols to achieve optimized process parameters for controlled microstructures and enhanced properties of materials. To this end, this work implements a phase-field model to simulate directional solidification of binary alloys. For applications involving strong nonequilibrium effects, a modified antitrapping current model is incorporated to help eject solute into the liquid phase based on experimentally calibrated, velocity-dependent partitioning coefficient. Investigated allow systems include SCN, Si-As, and Ni-Nb. The SCN alloy is chosen to verify the computational method, and the other two are selected for a parametric study due to their different diffusion properties. The modified antitrapping current model is compared with the classical model in terms of predicted dendrite profiles, tip undercooling, and tip velocity. Solidification parameters—the cooling rate and the strength of anisotropy—are studied to reveal their influences on dendrite growth. Computational results demonstrate effectiveness of the PFM and the modified antitrapping current model in simulating rapid solidification with strong nonequilibrium at the interface.
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2

Haines, Scott. The determination of the solidification paths and the liquidus surface in the quasicrystalline region of the Al-Cu-Ru systems. Office of Scientific and Technical Information (OSTI), December 1995. http://dx.doi.org/10.2172/204668.

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Boldt, Christopher. Directional solidification of the alumina-zirconia ceramic eutectic system. Office of Scientific and Technical Information (OSTI), July 1994. http://dx.doi.org/10.2172/10190639.

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Canonico, J. Scott. Solidification/Stabilization of High Nitrate and Biodenitrified Heavy Metal Sludges with a Portland Cement/Flyash System. Office of Scientific and Technical Information (OSTI), July 1995. http://dx.doi.org/10.2172/770933.

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5

Trussell, S., and R. D. Spence. Feasibility study on the solidification of liquid low-level radioactive mixed waste in the inactive tank system at Oak Ridge National Laboratory, Oak Ridge, Tennessee. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/6699813.

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6

Trussell, S., and R. D. Spence. Feasibility study on the solidification of liquid low-level radioactive mixed waste in the inactive tank system at Oak Ridge National Laboratory, Oak Ridge, Tennessee. Environmental Restoration Program. Office of Scientific and Technical Information (OSTI), January 1993. http://dx.doi.org/10.2172/10121645.

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Figueroa, L., N. E. Cook, R. L. Siegrist, J. Mosher, S. Terry, and S. Canonico. [Task 1.] Biodenitrification of low nitrate solar pond waters using sequencing batch reactors. [Task 2.] Solidification/stabilization of high strength and biodenitrified heavy metal sludges with a Portland cement/flyash system. Office of Scientific and Technical Information (OSTI), September 1995. http://dx.doi.org/10.2172/774262.

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