Дисертації з теми "Diffusing Diffusivity"
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Chmelik, Christian, Pavel Kortunov, Sergey Vasenkov, Taro Ito, Jörg Kärger, Jan Konatowski, Jens Weitkamp, and Douglas M. Ruthven. "Transport diffusivity in zeolites." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196446.
Повний текст джерелаLarsen, Ryan J., and Charles F. Zukoski. "Self-diffusivity and free volume." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-188864.
Повний текст джерелаHeber, André, Markus Selmke, and Frank Cichos. "Thermal diffusivity measurements with a single nanoparticle." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-183781.
Повний текст джерелаKremer, Heiko, Cristina Botero, Andreas P. Fröba, and Alfred Leipertz. "Thermal diffusivity of fluids by dynamic light scattering." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196289.
Повний текст джерелаRudakova, Maya, and Andrey Filippov. "Diffusivity of water in a biological model membrane." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-197030.
Повний текст джерелаHeber, André, Markus Selmke, and Frank Cichos. "Thermal diffusivity measurements with a single nanoparticle." Diffusion fundamentals 20 (2013) 89, S. 1, 2013. https://ul.qucosa.de/id/qucosa%3A13676.
Повний текст джерелаKremer, Heiko, Cristina Botero, Andreas P. Fröba, and Alfred Leipertz. "Thermal diffusivity of fluids by dynamic light scattering." Diffusion fundamentals 2 (2005) 72, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14405.
Повний текст джерелаLarsen, Ryan J., and Charles F. Zukoski. "Self-diffusivity and free volume: an ideal binary mixture." Diffusion fundamentals 11 (2009) 8, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A13928.
Повний текст джерелаNechaev, Yury S. "Mechanisms of hydrogen sorption, solubility and diffusivity in carbon nanomaterials, relevance to the on-board storage problem: Mechanisms of hydrogen sorption, solubility and diffusivityin carbon nanomaterials, relevance to the on-board storage problem." Diffusion fundamentals 2 (2005) 100, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14437.
Повний текст джерелаRudakova, Maya, and Andrey Filippov. "Diffusivity of water in a biological model membrane: an NMR study." Diffusion fundamentals 2 (2005) 130, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14472.
Повний текст джерелаRuthven, Douglas M. "Adsorption and desorption kinetics for diffusion controlled systems with a strongly concentration dependent diffusivity: Adsorption and desorption kinetics for diffusion controlledsystems with a strongly concentration dependent diffusivity." Diffusion fundamentals 6 (2007) 51, S. 1-11, 2007. https://ul.qucosa.de/id/qucosa%3A14230.
Повний текст джерелаMi, Xi, and Yunfeng Shi. "On the measurement of surface diffusivity in disordered nanoporous carbon via molecular dynamics simulations." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-185894.
Повний текст джерелаRuthven, Douglas M. "Adsorption and desorption kinetics for diffusion controlled systems with a strongly concentration dependent diffusivity." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193874.
Повний текст джерелаČapek, Pavel, Vladimír Hejtmánek, Libor Brabec, Arlette Zikánová, Milan Kočiřík, and Bohumil Bernauer. "3D stochastic replicas of porous solids: a way to improve predicted diffusivity." Diffusion fundamentals 11 (2009) 79, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A14044.
Повний текст джерелаHejtmánek, Vladimír, Pavel Čapek, Libor Brabec, Arlette Zikánová, Milan Kočiřík, and Bohumil Bernauer. "3D stochastic replicas of porous solids: a way to improve predicted diffusivity." Diffusion fundamentals 11 (2009) 91, S. 1-4, 2009. https://ul.qucosa.de/id/qucosa%3A14064.
Повний текст джерелаChmelik, Christian, Pavel Kortunov, Sergey Vasenkov, Taro Ito, Jörg Kärger, Jan Konatowski, Jens Weitkamp, and Douglas M. Ruthven. "Transport diffusivity in zeolites: possible reasons for misleading results of macroscopic techniques." Diffusion fundamentals 2 (2005) 86, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14421.
Повний текст джерелаBassett, John. "Assessing the Spatial Diffusivity of Sound Fields in Rooms using Ambisonic Techniques." Thesis, The University of Sydney, 2012. http://hdl.handle.net/2123/8255.
Повний текст джерелаChiu, Ka Lok. "Thermal diffusion of organic semiconductors determined by scanning photothermal deflection (SPD) technique." HKBU Institutional Repository, 2020. https://repository.hkbu.edu.hk/etd_oa/843.
Повний текст джерелаSharma, Manju, and Subramanian Yashonath. "Size dependence of solute diffusivity and Stokes-Einstein relationship: effect of van der Waals interaction." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193071.
Повний текст джерелаSelezneva, Liudmila V., and Andrei V. Nazarov. "The influence of interstitial impurity atom – vacancy complex on diffusivity of interstitial atom in alpha-iron." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-193608.
Повний текст джерелаMi, Xi, and Yunfeng Shi. "On the measurement of surface diffusivity in disordered nanoporous carbon via molecular dynamics simulations." Diffusion fundamentals 16 (2011) 84, S. 1-8, 2011. https://ul.qucosa.de/id/qucosa%3A13829.
Повний текст джерелаRuprecht, Benjamin, Jessica Heine, Martin Wikening, Sylvio Indris, Joseph Wontcheu, Wolfgang Bensch, Thomas Bredow, and Paul Heitjans. "Influence of anion substitution on the lithium diffusivity in hexagonal Li x TiS 2-y Se y." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-188254.
Повний текст джерелаNanok, Tanin, O. Sangsawang, Sergey Vasenkov, Frerich J. Keil, and Siegfried Fritzsche. "Molecular dynamics simulation study of the concentration dependence of the self-diffusivity of methanol in NaX zeolite." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189605.
Повний текст джерелаNechaev, Yury S. "Mechanisms of hydrogen sorption, solubility and diffusivity in carbon nanomaterials, relevance to the on-board storage problem." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196620.
Повний текст джерелаSharma, Manju, and Subramanian Yashonath. "Size dependence of solute diffusivity and Stokes-Einstein relationship: effect of van der Waals interaction." Diffusion fundamentals 7 (2007) 11, S. 1-15, 2007. https://ul.qucosa.de/id/qucosa%3A14168.
Повний текст джерелаSelezneva, Liudmila V., and Andrei V. Nazarov. "The influence of interstitial impurity atom – vacancy complex on diffusivity of interstitial atom in alpha-iron." Diffusion fundamentals 6 (2007) 34, S. 1-2, 2007. https://ul.qucosa.de/id/qucosa%3A14210.
Повний текст джерелаThermitus, Marc-Antoine. "Nouvelles techniques d'identification de la diffusivité thermique par la méthode Flash." Lyon, INSA, 1997. http://www.theses.fr/1997ISAL0029.
Повний текст джерелаThe aim of this work is to propose new identification techniques of thermal diffusivity with the flash method in the case of isotropic and opaque materials. In the first approach, the temperature histories of the two faces of the sample are considered. It is shown that their ratio doesn’t depend on the radial heat diffusion within the sample. In this case, thermal diffusivity can be identified with an adapted moment method. Another way to take the two thermograms into account, is to compute the ratio of their Laplace transforms. Using the quadrupole method, it is shown that the duration of the pulse has no effect. Thermal diffusivity is then identified with the Levenberg-Marquardt method. This technique is particularly suitable for thin films. In the second approach, the logarithmic transform of the rear face temperature rise is considered. In comparison with other existing techniques, the new obtained regression model has the peculiarity to be less sensible to heat losses and to the non-uniformity of the pulse. Furthermore. A stare model is proposed, allowing the identification of thermal diffusivity with the Kalman filter. This technique is also suitable for on-line data redution
Sahalan, Mariaulpa. "Diffusion-weighted Imaging of Lymph Node Tissue." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/20070.
Повний текст джерелаRuprecht, Benjamin, Jessica Heine, Martin Wikening, Sylvio Indris, Joseph Wontcheu, Wolfgang Bensch, Thomas Bredow, and Paul Heitjans. "Influence of anion substitution on the lithium diffusivity in hexagonal Li x TiS 2-y Se y." Diffusion fundamentals 12 (2010) 106, 2010. https://ul.qucosa.de/id/qucosa%3A13915.
Повний текст джерелаNanok, Tanin, O. Sangsawang, Sergey Vasenkov, Frerich J. Keil, and Siegfried Fritzsche. "Molecular dynamics simulation study of the concentration dependence of the self-diffusivity of methanol in NaX zeolite." Diffusion fundamentals 11 (2009) 33, S. 1-2, 2009. https://ul.qucosa.de/id/qucosa%3A13977.
Повний текст джерелаBoumaaza, Mouna. "Experimental investigation of gas diffusivity and CO2-binding capacity of cementitious materials." Thesis, La Rochelle, 2020. https://tel.archives-ouvertes.fr/tel-03285120.
Повний текст джерелаThe current standardized methods used to investigate the carbonation performance of concrete are based on the direct determination of the pH variation on the surface of a concrete specimen exposed to ambient or higher CO2 concentration. These methods are either time-consuming (natural carbonation) or of a questionable accuracy (accelerated carbonation). The carbonation physicochemical process involves two major mechanisms: gaseous CO2 diffusion into the cementitious material’s porous network and its dissolution and reaction with CaO of the hardened cement paste. Most carbonation depth prediction models require the CO2-effective diffusion coefficient and the amount of carbonatable products as input parameters. Hence the aim of this work is to develop two simple and reliable test methods to determine these two properties in a reliable and cost-effective manner.First we developed and validated a test method to determine the oxygen-effective diffusion coefficient (De,O2) of nine different hardened cement pastes preconditioned at different relative humidity levels, and 44 concrete mixtures. The influence of the hydration duration, water-per-binder ratio, accelerated carbonation, and binder type on the oxygen diffusivity was investigated. The dependence of the De,O2 on the tested concrete specimen thickness was investigated at the dry state and after conditioning at 93%RH. The De,O2 was determined before and after full carbonation of six concrete mixtures previously conditioned at different RH. A correlation between oxygen permeability and diffusivity is investigated on 44 concrete mixtures.A second test method is developed to determine the instantaneous CO2 binding rate and the amount of carbonatable products of powdered hydrated cement pastes and synthetic anhydrous and hydrates. The samples were carbonated in open systems at ambient CO2 concentration and controlled relative humidity, and then the system switches into a closed configuration while the measurement of the CO2-uptake is performed over a short period of time. The test method allows for the measurement of the carbonation reaction rate and capacity; and their evolution as function of time under different RH. The developed method shows advantages for being nondestructive, allowing the samples to carbonate at controlled CO2 concentration and humidity, and providing measurements with low cost equipment. A good agreement between the test method results and thermogravimetric analysis was observed, which highlights the reliability and accuracy of the developed test method.The results obtained from the gaseous diffusion coefficient and carbonatable products test methods were used as inputs for carbonation depth prediction models. A correlation was investigated between the measured carbonation depth on different concrete and hydrated cement pastes mixtures by means of phenolphthalein solution under both natural and accelerated exposure. The results were compared with the calculated carbonation depth using our experimental results
Die zurzeit verwendeten Methoden zur Untersuchung des Karbonatisierungs-widerstandes von Beton basieren auf der direkten Bestimmung des pH-Wertes der oberflächennahen Betonrandzone, die zuvor einer bestimmten Prüflagerung ausgesetzt war (relative Luftfeuchte, spezifische CO2-Konzentrationen). Diese Methoden sind jedoch entweder sehr zeitaufwändig (natürliche Karbonatisierung) oder von fraglicher Praxisnähe (beschleunigte Karbonatisierung). Der physikalisch-chemische Karbonatisierungsprozess beinhaltet zwei Hauptmechanismen: die Diffusion von gasförmigem CO2 in das poröse Netzwerk des Betons und dessen Auflösung und Reaktion mit CaO der ausgehärteten Zementsteins. Die meisten Modelle zur Vorhersage der Karbonatisierungstiefe erfordern den effektiven CO2-Diffusionskoeffizienten und die Menge an karbonatisierbarer Masse als Eingabeparameter. Ziel dieser Arbeit ist es, zwei einfache und zuverlässige Testmethoden zu entwickeln, um diese beiden Eigenschaften zuverlässig und kostengünstig zu bestimmen.Nach Entwicklung und Validierung einer geeigneten Testmethode zur Messung von Sauerstoffdiffusionskoeffizienten (De,O2), wurden diese an neun verschiedenen Zementproben gemessen, die bei unterschiedlichen relativen Luftfeuchten vorkonditioniert wurden. Anschließend wurden 44 verschiedene Betonmischungen geprüft. Bei diesen wurde die Hydratationsdauer und der Wasserbindemittelwert variiert. Die Abhängigkeit des Sauerstoffdiffusionskoeffizienten De,O2 von der getesteten Betonprobendicke wurde im trockenen Zustand und nach Konditionierung bei 93% relativer Luftfeuchtigkeit untersucht. Der Sauerstoffkoeffizient De,O2 wurde vor und nach der vollständigen Carbonisierung von sechs Betonmischungen bestimmt, die zuvor bei unterschiedlicher relativer Luftfeuchtigkeit vorkonditioniert worden waren. Eine zweite Testmethode wurde entwickelt, um die momentane CO2-Bindekapazität und die Menge an karbonatisierbarer Masse aus pulverförmigen Zementhydratpasten und synthetischen wasserfreien Produkten und Hydraten zu bestimmen. Die Proben wurden zunächst in offenen Systemen bei einer CO2-Konzentration in der Umgebung und einer kontrollierten relativen Luftfeuchtigkeit gegeben, um danach dann in eine geschlossene Konfiguration umzuwechseln. So konnte man die CO2-Aufnahme über einen kurzen Zeitraum nachverfolgen. Die Testmethode ermöglicht die Messung der Karbonatisierungsreaktionsrate und –kapazität in Abhängigkeit der Zeit unter verschiedenen relativen Luftfeuchten der Umgebungsluft. Es wurde eine gute Übereinstimmung zwischen den Ergebnissen der Testmethode und der thermogravimetrischen Analyse festgestellt, was die Zuverlässigkeit und Genauigkeit der entwickelten Untersuchungsmethodik unterstreicht.Die Ergebnisse beider Tests wurden als Input für Vorhersagemodelle für den zeitabhängigen Karbonatisierungsfortschritt von Beton verwendet. Es wurde eine Korrelation zwischen der gemessenen Karbonatisierungstiefe an verschiedenen Beton- und Zementhydratmischungen mittels Phenolphthaleinlösung untersucht, wobei u. a. Karbonatisierungstiefen bestimmt nach natürlicher Lagerung mit berechneten/vorhergesagten Karbonatisierungstiefen, die mithilfe der vorgestellten Modellierung und Inputdaten aus Test miteinander verglichen wurden
Wirbeleit, Frank. "Arsenic diffusivity study by comparison of post-Surface and post-implant diffusion in silicon with Local Density Diffusion (LDD-) model approximation." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186124.
Повний текст джерелаWirbeleit, Frank. "Arsenic diffusivity study by comparison of post-Surface and post-implant diffusion in silicon with Local Density Diffusion (LDD-) model approximation." Diffusion fundamentals 15 (2011) 3, S. 1-10, 2011. https://ul.qucosa.de/id/qucosa%3A13836.
Повний текст джерелаMartins, Bingre Do Amaral Rogéria Paula. "Porosity design of a shaped zeolite for improved effective diffusivity." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAF025.
Повний текст джерелаZeolites are aluminosilicate catalysts widely used in industrial processes, with paramount importance in catalysis area. These materials are synthesized in a laboratory in a form of a powder and have to be shaped into centimeter-sized bodies to be implemented at large scale. This process is performed by the addition of a binder, in this case boehmite, to confer the mechanical strength required. The work described in this Thesis aimed to introduce additional porosity in shaped zeolite by means of pore former agents. These catalysts were tested in different catalytic reactions and toluene adsorption to assess the effect of meso- and/or macropores presence in the binder. It was verified an improvement of the performance of the samples with a raise in the macropore volume. The samples were also tested in pulsed-field gradient NMR, uptake measurements and inverse gas chromatography to determine the effective diffusivity of probe molecules. The results allowed to establish a correlation between the catalytic performance and an improved diffusion
Nechaev, Yury S. "On the physics of the apparent solubility and diffusivity of hydrogen in metals and alloys, relevance for revealing the hydrogen-assisted damage micromechanisms." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196064.
Повний текст джерелаKechaou, Nabil. "Séchage de gels fortement déformables : étude de la diffusion interne de l'eau et modélisation." Vandoeuvre-les-Nancy, INPL, 1989. http://www.theses.fr/1989NAN10063.
Повний текст джерелаDu, Plessis Elsa. "Modelling of single phase diffusive transport in porous environments." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4323.
Повний текст джерелаENGLISH ABSTRACT: Macroscopic diffusion through porous media is considered in systems where this process does not occur along with or induce bulk convective flow of the diffusing species. The diffusion coefficient present in the governing equations of suchmacroscopic diffusion is unique to a pair of species in a binary system. This coefficient may be determined experimentally, but such experimentation must be carried out for every different pair of species. Taking this into consideration, a deterministic pore-scale model is proposed to predict the effective diffusivity of homogeneous and unconsolidated porous media which ultimately depends solely on the porosity of the media. The approach taken is to model a porous medium as either a fibre bed or an array of granules through which the diffusive process is assumed to be homogenous and transversally isotropic. The fibre bed and granular modelsmay be viewed as two-dimensional and three-dimensional models respectively, and may also be combined to form a weighted average model which adjusts to differing diffusive behaviour at different porosities. The model is validated through comparison with published analytical and numerical models as well as experimental data available in the literature. A numerical program is implemented to generate further data for various arrangements of homogeneous, anisotropic and transversely isotropic porous media. The numerical results were validated against an analytical model from the literature which proved to be inapplicable to a specific case. The weighted average analytical model is proposed for this case, instead. The results of this study indicate that the weighted average analytical model is in good agreement with the numerical and experimental data and as such may be applied directly to a binary system of which the porosity is known in order to predict the effective diffusivity.
AFRIKAANSE OPSOMMING: Makroskopiese diffusieprosesse deur poreuse media word oorweeg in sisteme waar geen konveksie van die diffunderende stof plaasvind of geïnduseer word nie. Die wiskundige beskrywing van hierdie prossese bevat die sogenaamde diffusiekoëffisïent, ’n konstante wat uniek is tot ’n tweeledige sisteem. Dié konstante kan eksperimenteel bepaal word, maar as gevolg van die uniekhied daarvan tot verskillende sisteme moet dit vir elke tweeledige sisteem bepaal word. Op grond hiervan word ’n deterministiese model voorgestel om die effektiewe diffusiwiteit vir diffusie deur homogene en losstaande poreuse media te voorspel. Die model hang slegs af van die porositeit van die poreuse medium wat benader word as ’n veselbed of korrelstruktuur. Die diffusieproses deur dergelike strukture word beskou as homogeen en isotroop in die dwarsstroomrigting. Die veselbed- en korrelmodelle word beskou as twee- en driedimensionele modelle onderskeidelik en word gekombineer om ’n geweegde gemiddelde model te vorm wat dus by enige porositeit die verlangde porositeit gee. Die model is geverifieer deur vergelyking met analitiese- en numeriese modelle asook eksperimentele data vanuit die literatuur. ’n Numeriese program is gebruik om verdere resultate te verkry vir verskeie skikkings van homogene, anisotrope en dwarsverskuifde poreuse media. Die numeriese resultate is gekontroleer deur vergelyking met ’n analitiese model vanuit die literatuur. ’n Spesifieke geval is uitgewys waarvoor hierdie model nie toepasbaar is nie, maar waarvoor die voorgestelde geweegde gemiddelde model goeie resultate lewer. Die uitkomste dui aan dat die analitiese model goed ooreenstem met die numeriese en eksperimentele data en kan dus direk toegepas word om die effektiewe diffusiwiteit te verkry van ’n tweeledige sisteem waarvan die porositeit bekend is.
Bensetiti, Zouhir. "Compétition réaction-diffusion estimation de la diffusivité effective du réactif et de l'efficacité du catalyseur." Vandoeuvre-les-Nancy, INPL, 1993. http://www.theses.fr/1993INPL134N.
Повний текст джерелаNechaev, Yury S. "On the physics of the apparent solubility and diffusivity of hydrogen in metals and alloys, relevance for revealing the hydrogen-assisted damage micromechanisms." Diffusion fundamentals 2 (2005) 53, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14386.
Повний текст джерелаLyashenko, Yu O., and L. I. Gladka. "Determination of effective diffusion coefficients for inhomogeneous media." Thesis, Sumy State University, 2011. http://essuir.sumdu.edu.ua/handle/123456789/20690.
Повний текст джерелаDo, Amaral Sobral Paulo José. "Diffusivité de l'eau dans le gel polyacrylamide-eau autour de la transition vitreuse." Vandoeuvre-les-Nancy, INPL, 1992. http://docnum.univ-lorraine.fr/public/INPL_T_1992_DO_AMARAL_SOBRAL_J.pdf.
Повний текст джерелаNelson, George J. "Computational characterization of diffusive mass transfer in porous solid oxide fuel cell components." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/31660.
Повний текст джерелаCommittee Co-Chair: Haynes, Comas; Committee Co-Chair: Wepfer, William; Committee Member: Fedorov, Andrei; Committee Member: Liu, Meilin; Committee Member: Paredis, Chris; Committee Member: Teja, Amyn. Part of the SMARTech Electronic Thesis and Dissertation Collection.
Calderan, Christelle. "Contribution à l'étude de la diffusion de la chaleur dans les barrières thermiques à structure hétérogène par microanalyse photothermique." Perpignan, 1999. http://www.theses.fr/1999PERP0386.
Повний текст джерелаPrillieux, Aurélien. "Hydrogen and water vapour effects on oxygen solubility and diffusivity in high temperature Fe-Ni alloys." Phd thesis, Toulouse, INPT, 2017. http://oatao.univ-toulouse.fr/18676/1/PRILLIEUX_Aurelien.pdf.
Повний текст джерелаCitron, Alberto <1988>. "Studio di processi elettrodici non diffusivi mediante nanoelettrodi di platino e applicazioni in elettroanalisi." Master's Degree Thesis, Università Ca' Foscari Venezia, 2014. http://hdl.handle.net/10579/5667.
Повний текст джерелаRambaks, Andris, Filipp Kratschun, Carsten Flake, Maren Messirek, Katharina Schmitz, and Hubertus Murrenhoff. "Computational approach to the experimental determination of diffusion coefficients for oxygen and nitrogen in hydraulic fluids using the pressure-decay method." Technische Universität Dresden, 2020. https://tud.qucosa.de/id/qucosa%3A71099.
Повний текст джерелаSimoni, Giulia. "Modelli diffusivi ed effetti di ritardo nella conduzione del calore e nella dinamica delle popolazioni." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/6934/.
Повний текст джерелаChen, Zhangqi. "A Comprehensive Study of Diffusion and Modulus of Binary Systems within the Ti-Mo-Nb-Ta-Zr System." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1562224291399741.
Повний текст джерелаAndré, Stéphane. "Identification de la diffusivité phonique du verre par méthode flash de 20°C à 500°C." Vandoeuvre-les-Nancy, INPL, 1992. http://docnum.univ-lorraine.fr/public/INPL_T_1992_ANDRE_S.pdf.
Повний текст джерелаThe flash method is extended to the 300K to 800K temperature range. Applied to semi-transparent media (S-T-M) and associated to a theoretical study of the coupled Conductions-Radiation 1-D transient heat transfer, it allows the direct measurement of the phonic diffusivity of glass. For this reason, the contribution of either the radiative boundary conditions (black or reflecting), the sample’s thickness, or the degree of semi-transparency (absorption coefficient) has been underscored. An experimental study has been carried out on five different glasses of various Fe2O3 content and has confirmed the theoretical predictions yielded by simulations made in the case of the gray medium. The spectral dependence of the absorption coefficient (“non-gray” medium) has been taken into-account through a multi-band model. It has no influence on the measurement of the phonic diffusivity in the prescribed conditions. Finally, we propose a new expression for the phonic conductivity of float glasses as a function of temperature
Sposini, Vittoria [Verfasser], Ralf [Akademischer Betreuer] Metzler, Gianni [Akademischer Betreuer] Pagnini, Ralf [Gutachter] Metzler, Arkady [Gutachter] Pikovsky, and Stas [Gutachter] Burov. "The random diffusivity approach for diffusion in heterogeneous systems / Vittoria Sposini ; Gutachter: Ralf Metzler, Arkady Pikovsky, Stas Burov ; Ralf Metzler, Gianni Pagnini." Potsdam : Universität Potsdam, 2020. http://d-nb.info/1226217214/34.
Повний текст джерела