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Dissertations / Theses on the topic 'Gas solid interaction'

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1

Tian, Jian Atwood J. L. "Molecular organic solids for gas adsorption and solid-gas interaction." Diss., Columbia, Mo. : University of Missouri--Columbia, 2009. http://hdl.handle.net/10355/6882.

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Title from PDF of title page (University of Missouri--Columbia, viewed on Feb 24, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Dissertation advisor: Dr. Jerry L. Atwood. Vita. Includes bibliographical references.
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2

KHAN, BILAL ALAM. "Measurement methods of Gas-Solid Interactions." Doctoral thesis, Politecnico di Torino, 2021. http://hdl.handle.net/11583/2942142.

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3

Akizuki, Makoto. "Gas Cluster Ion-Solid Surface Interaction and Thin Film Formation." Kyoto University, 1999. http://hdl.handle.net/2433/181783.

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4

Brancher, Ricardo. "Experimental and numerical analysis of interaction between gas and solid surface." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0677.

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Cette thèse est consacrée à l’étude expérimentale et numérique de l’interaction entre gaz et surface solide. L’écoulement de gaz raréfié à travers un microcanal rectangulaire dans des conditions isothermes et nonisothermes ont été évalués expérimentalement. Le coefficient d’accommodation de la composante tangentielle de la quantité de mouvement pour le matériau PEEK (Poly Ether Ether Ketone) associé à cinq gaz (hélium, néon, azote, argon, krypton) a été extrait des écoulements induits par gradient de pression et gradient de température. De plus, des écoulements unidimensionnels stables d’un ga
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5

Qin, Tong. "Numerical Simulations of Interactions of Solid Particles and Deformable Gas Bubbles in Viscous Liquids." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19225.

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Studying the interactions of solid particles and deformable gas<br />bubbles in viscous liquids is very important in many applications,<br />especially in mining and chemical industries. These interactions<br />involve liquid-solid-air multiphase flows and an<br />arbitrary-Lagrangian-Eulerican (ALE) approach is used for the direct<br />numerical simulations. In the system of rigid particles and<br />deformable gas bubbles suspended in viscous liquids, the<br />Navier-Stokes equations coupled with the equations of motion of the<br />particles and deformable bubbles are solved in a finite-eleme
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6

Hackett, Gregory A. "Interaction of nickel-based SOFC anodes with trace contaminants from coal-derived synthesis gas." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10728.

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Thesis (Ph. D.)--West Virginia University, 2009.<br>Title from document title page. Document formatted into pages; contains xii, 122 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 115-122).
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7

Ghosalya, M. K. "Gas-solid surface interaction with reactive and less reactive gases : a near ambient pressure photoelectron spectroscopy study." Thesis(Ph.D.), CSIR- National Chemical Laboratory, Pune, 2018. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4578.

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Chapter 1 and 2, a brief introduction role of surface science, photoelectron spectroscopy and gas solid interaction in catalysis has been given. Photoelectron spectroscopy is a versatile technique that can be advantageously used for characterization of a number of surface properties of the solid surface and interfaces, like chemical composition, oxidation state, element mapping, solid-gas interactions etc. Conventionally, the photoelectron spectroscopy is an ultra-high vacuum technique. However, the photoelectrons cannot reach the detector due to inelastic collision with gas-phase molecules at
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8

Jain, R. "Gas-solid interaction and its influence in electronic structure and catalysis: a near ambient pressure photoelectron spectroscopy study." Thesis(Ph.D.), CSIR-National Chemical Laboratory, 2018. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4541.

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Chemistry at a catalyst surface i.e. response of the catalyst for structure and electronic change during catalysis, and gas-solid interaction of catalyst and reactant is very crucial for the fundamental understanding of a catalytic process. Tracking surface phenomenon during catalysis can shed light on the surface electronic structure, catalyst nature and provides a fundamental correlation between catalytic performance and possible pathways, which helps to design a catalyst in a better way. NAPPES is a powerful tool that is inherently surface sensitive, and chemical-specific, with the ability
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9

Mohammad, Hasan Abid Urf Turabe Ali. "Ammonia gas adsorption on metal oxide nanoparticles." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/13094.

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Master of Science<br>Department of Mechanical and Nuclear Engineering<br>Steven J. Eckels<br>NanoActiveTM metal oxide particles have the ability to destructively adsorb organophosphorus compounds and chlorocarbons. These nanomaterials with unique surface morphologies are subjected to separate, low concentrations of gaseous ammonia in air. NanoActiveTM materials based on magnesium oxide have large specific surface areas and defective sites that enhance surface reactivity and consequently improved adsorptivity. In gas contaminant removal by adsorption, presence of vast specific surface area is e
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10

Niaki, Seyed Reza Amini. "Effects of inter particle friction on the meso-scale hydrodynamics of dense gas-solid fluidized flows." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18147/tde-10122018-165927/.

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Gas-solid fluidized bed reactors are widely applied in chemical and energy industries, and their design and scale-up are virtually empirical, extremely expensive and time consuming. This scenario has motivated the development of alternative theoretical tools, and two-fluid modeling, where gas and particulate are both treated as interpenetrating continuum phases, has appeared as a most promising approach. Owing to the large domains to be resolved in real-scale fluidized bed reactors, only filtered modeling approaches are feasible, and closure models become necessary to recover sub-grid effects
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11

Lazarevic, David Andrew. "In-situ Removal of Hydrogen Sulphide from Landfill Gas : Arising from the Interaction between Municipal Solid Waste and Sulphide Mine Environments within Bioreactor Conditions." Thesis, KTH, Industriell ekologi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-32770.

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This project was compiled in co-operation with the Royal Institute of Technology, Stockholm and Veolia Environmental Services (Australia) at the Woodlawn Bioreactor in NSW, Australia. Hydrogen sulphide is an unwanted component of landfill gas, raising occupational health and safety concerns, whilst leading to acid gas corrosion of power generation equipment and increased emissions of SOx, a primary constituent of acidification. Australian governmental requirements to place a periodic cover over the unused proportion of the tipping surface of landfills and bioreactors create an interesting oppo
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12

Tóth, Balázs. "Two-phase flow investigation in a cold-gas solid rocket motor model through the study of the slag accumulation process." Doctoral thesis, Universite Libre de Bruxelles, 2008. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210575.

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The present research project is carried out at the von Karman Institute for Fluid Dynamics (Rhode-Saint-Genèse, Belgium) with the financial support of the European Space Agency.<p><p>The first stage of spacecrafts (e.g. Ariane 5, Vega, Shuttle) generally consists of large solid propellant rocket motors (SRM), which often consist of segmented structure and incorporate a submerged nozzle. During the combustion, the regression of the solid propellant surrounding the nozzle integration part leads to the formation of a cavity around the nozzle lip. The propellant combustion generates liquefied alum
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13

Zidan, M. D. "Gas-liquid surface interactions." Thesis, University of Sussex, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333478.

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14

Vitorica, Inigo. "Solid state supramolecular chemistry : gas-solid reactions and intermolecular interactions." Thesis, University of Sheffield, 2012. http://etheses.whiterose.ac.uk/3926/.

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15

Zhang, Yonghao. "Particle-gas interactions in two-fluid models of gas-solid flows." Thesis, University of Aberdeen, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.367375.

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Modelling gas-solid two-phase flows using a two-fluid approach has two main difficulties: formulating constitutive laws for the particulate stresses and modelling the gas turbulence modulation. Due to the complex nature of the gas-particle interactions, there is no universal model covering every flow regime. In this thesis, three flow regimes with distinctive characteristics are studied, i.e. the very dense regime where the solid volume fraction, <I>v</I><sub>2</sub>>5%, the dense flow regime where 5%≥1%, and the relatively dilute regime where 1%≥<I>v<sub>2</sub></I>>0.1%. In the very dense fl
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16

Karimi, Mohsen. "CFD analysis of solid-liquid-gas interactions in flotation vessels." Thesis, Stellenbosch : Stellenbosch University, 2014. http://hdl.handle.net/10019.1/86281.

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Thesis (PhD)--Stellenbosch University, 2014.<br>ENGLISH ABSTRACT: A Computational Fluid Dynamics (CFD) model was developed for the prediction of flotation rate constants in a stirred flotation tank and validated against experimental data. The model incorporated local, time-varying values of the turbulent flow field into an existing kinetic flotation model based on the Generalised Sutherland Equation to predict the overall flotation rate constant. Simulations were performed for the flotation of various minerals at different operational conditions and the predictions were compared with exp
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17

Abernathy, Harry Wilson III. "Investigations of gas/electrode interactions in solid oxide fuel cells using vibrational spectroscopy." Diss., Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22638.

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The goal of current solid oxide fuel cell (SOFC) research is to design electrode materials and other system components that permit the fuel cell to be operated in the 400-700ºC range. Cell performance in this lower temperature range is limited by the oxygen reduction process at the SOFC cathode and by multiple contamination processes. The work presented demonstrates that Raman spectroscopy, a form of vibrational spectroscopy, can provide structural and compositional information complementary to that from traditional characterization methods. Initial experiments into the oxygen reduction mechan
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18

Abernathy, III Harry Wilson. "Investigations of gas/electrode interactions in solid oxide fuel cells using vibrational spectroscopy." Atlanta, Ga. : Georgia Institute of Technology, 2008. http://hdl.handle.net/1853/22638.

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Thesis (Ph. D.)--Materials Science and Engineering, Georgia Institute of Technology, 2008.<br>Committee Chair: Liu, Meilin; Committee Member: El-Sayed, Mostafa; Committee Member: Sanders, Thomas; Committee Member: Speyer, Robert; Committee Member: Wilson, Lane.
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19

Shantharama, L. G. "The k-p interaction and carrier transport in GaAs, InP and related semiconductor alloys." Thesis, University of Surrey, 1986. http://epubs.surrey.ac.uk/848011/.

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The band structure and transport properties of the technologically important materials GaAs and InP and (GaIn)(AsP)/InP were studied as a function of temperature, pressure and magnetic field. The electron effective mass, m*, was measured as a function of energy gap, E[o], using hydrostatic pressure as a dummy variable to change the band structure. In InP it was found that the three band k-p model was sufficient to explain the energy gap dependence of the effective mass while in GaAs, a small contribution from higher bands was necessary. In Ga[x]In[1-x]As[y]P[1-y] alloys, dm* /dEo was found to
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20

Ghasemian, Langeroudi Elahe. "Quantitative aspects of Co2-grafted amine interactions in gas-liquid-solid solubility equilibrium: Applications to Co2 capture." Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27879/27879.pdf.

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21

Ghasemian, Langeroudi Elahe. "Quantitative aspects of CO₂-grafted amine interactions in gas-liquid-solid solubility equilibrium : applications to CO₂ capture." Master's thesis, Université Laval, 2010. http://hdl.handle.net/20.500.11794/21467.

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Les effets liés à la présence d'eau liquide sur la capacité d'adsorption de CO₂ par une silice mésoporeuse de type SBA-15 fonctionnalisée au moyen des amines suivantes: aminopropyltrimethoxysilane (APS) et N-(2-aminoéthyl) -3 - (aminopropyl) trimethoxysilane (AEAPS) ont été examinés pour évaluer le potentiel de ce mode de contact dans des laveurs gaz-liquide-solide. Les résultats ont été comparés à la capacité d'adsorption de CO₂ des amines greffées dans des conditions humides et sèches ainsi qu'à la capacité d'absorption de CO₂ dans les systèmes gaz-liquide avec des solutions aqueuses d'aminé
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22

Bastos, Jaci Carlo Schramm Camara. "Analise experimental e numerica de um jato de dispersão gas-solido." [s.n.], 2009. http://repositorio.unicamp.br/jspui/handle/REPOSIP/267143.

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Orientador: Milton Mori<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Quimica<br>Made available in DSpace on 2018-08-14T18:54:23Z (GMT). No. of bitstreams: 1 Bastos_JaciCarloSchrammCamara_D.pdf: 4353350 bytes, checksum: 0de3633c8edcc4ae2ec7fc57a3b590d0 (MD5) Previous issue date: 2009<br>Resumo: Apresenta-se nesta pesquisa uma análise experimental e numérica do comportamento da fase dispersa em um jato circular bifásico confinado e uma comparação com jato circular bifásico livre. Nas análises experimentais, uma câmara pentagonal em acrílico foi utilizada com
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23

Groenewald, Ferdinand George. "Computational study of anion-anion intermolecular interactions between I3-ions in the gas phase, solution and solid state." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/71786.

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24

Xu, Yeping. "Synthesises of mesoporous materials and studies of host-guest interaction in mesoporous carbon by solid state NMR." Berlin mbv, Mensch-und-Buch-Verl, 2009. http://d-nb.info/995894957/04.

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25

Gohlke, David Christopher. "Tuning the Properties and Interactions of Manganese Acceptors in Gallium Arsenide with STM." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1354669837.

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26

Volk, Annette. "Quantification and Assessment of Numerical Error in Coupled Computational Fluid Dynamics - Discrete Element Method Simulations of Gas Flow through Granular Solids." University of Cincinnati / OhioLINK, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1543139366302536.

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27

Alzahrani, Faris. "3D modelling by computational fluid dynamics of local interactions of momentum, mass and heat transfers with catalyst deactivation in gas-solid catalytic reactors of low aspect ratios." Thesis, Lancaster University, 2016. http://eprints.lancs.ac.uk/82666/.

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Packed beds of gas-solid systems are extensively used as reactors, separators, dryers, filters, heat exchangers and combustors. The design of packed beds requires a detailed knowledge of local dynamics of flow, composition and temperature. Unfortunately, investigations for the development of 3D modelling codes by computational fluid dynamics are still not sufficiently mature compared with those relying on 2D modelling or simplified pseudo-homogenous models. This project investigates non-uniform catalyst deactivation in packed bed reactors of low aspect ratios under steady-state and dynamic ope
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28

Bréant, Christian. "Développement de lasers infrarouges accordables de haute pureté spectrale : application à la spectroscopie hyperfine des molécules HF et SF(6)." Paris 13, 1985. http://www.theses.fr/1985PA132010.

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Les développements de deux spéctromètres de saturation à ultra-haute résolution dans le domaine infrarouge, l'un dans la région spectrale 9-12 mu m et l'autre accordable de 2,3 a 3,2 mu m sont exposés en detail. La stabilisation en fréquence d'un laser à CO(2) conventionnel ou guide d'ondes au niveau de la dizaine de hertz ainsi que l'obtention d'une stabilité meilleure que 1 khz pour le laser à centres colores soulignent le role cle de ces oscillateurs dans la chaine de raccordement de fréquence de l'horloge à cesium vers le domaine visible. L'étude des interactions hyperfines est presentée d
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29

Saad, Ali Sahal. "Synthèse de capteurs sélectifs destinés à la détection de NH³ et H²S pour le contrôle et la gestion de matières organiques en production de bio-énergies." Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://www.theses.fr/2019CLFAC096.

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La thèse vise au développement de microsystèmes capteurs de gaz sélectifs à l’ammoniac (NH3) et au sulfure d’hydrogène (H2S). Ces capteurs sont destinés au contrôle, à la gestion de la production et la sécurité dans les usines de méthanisation. Pour ce faire, deux types de capteurs chimiques utilisant des matériaux sensibles différents ont été investigués pour la détection des gaz. L’objectif premier est la mise en oeuvre des matériaux sensibles capables de réagir avec les molécules gazeuses et la caractérisation physico-chimique des matériaux. Ainsi, notre choix s’est focalisé sur un composit
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30

Grenier, Romain. "Etude multi-échelle des phénomènes physico-chimiques aux interfaces gaz – surfaces métalliques." Thesis, Paris Est, 2015. http://www.theses.fr/2015PEST1113/document.

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Dans le contexte des écoulements micro- et nano-fluidiques, ce travail porte sur l'étude des interactions à l'interface entre des flux de gaz rares et des surfaces métalliques via une approche de modélisation multi-physique et multi-échelle. Elle se concentre tout particulièrement sur l'interaction entre l'argon et une surface d'or. Pour ce faire la modélisation a été effectuée en deux étapes, une première partie utilisant la mécanique quantique à l'échelle atomique et une deuxième partie de dynamique moléculaire à l'échelle nanométrique. La première partie est consacrée à l'obtention de poten
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31

Goble, Nicholas James. "ELECTRONIC TRANSPORT AT SEMICONDUCTOR AND PEROVSKITE OXIDE INTERFACES." Case Western Reserve University School of Graduate Studies / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1454002713.

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32

Wang, TingTing. "Acoustic / elastic wave propagation in coupled-resonator waveguides." Thesis, Bourgogne Franche-Comté, 2020. http://www.theses.fr/2020UBFCD061.

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Lorsqu'un défaut est introduit dans un cristal phononique, des états apparaissent dans les bandes interdites et se localisent au niveau des défauts. Ils décroissent rapidement loin du défaut. Par conséquent, il est possible de localiser et de guider la propagation des ondes en concevant des défauts dans un cristal phononique parfait. Le guide d’onde à résonateurs couplés, fondé sur le couplage d'une séquence de cavités, présente simultanément un fort confinement des ondes et une faible vitesse de groupe ; il peut être utilisé pour concevoir des circuits plutôt arbitraires. En outre, la propaga
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Galparsoro, Larraza Oihana. "Phonon and electron excitations in diatom abstraction from metallic surfaces." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0417/document.

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La rationalisation des processus chimiques élémentaires aux surfacesest d'intérêt primordial pour de nombreux phénomènes naturels ou d'intérêttechnologique. D'un point de vue fondamental, la façon dont l'énergie, concomitanteà toute réaction chimique, est distribuée parmi les degrés de liberté des moléculesformées et/ou transférée à la surface est loin d'être systématisée. Dans ce travail,des simulations, reposant sur la méthode des trajectoires quasi-classiques (QCT),sont réalisées pour examiner cette problématique lors de recombinaisons demolécules d'hydrogène (H2) et d'azote (N2) résultant
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34

Chen, Chih-Wei, and 陳熾緯. "The Simulation of Accretion Disk and Interaction of Gas-Solid Particle." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/71049036198901188819.

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碩士<br>國立中央大學<br>天文研究所<br>92<br>We simulated the drift of particles in radial direction and surface density of accretion disk with considering the mass infall. The surface density of accretion disk will pass through growth phase, peak phase (about one hundred thousand years to million years), and decay phase. The drift of particle in the accretion disk with mass infall is different from the accretion disk without mass infall. There are two transient phenomena in the life time of accretion disks: FU-Orionis phenomenon and rapid disk dispersal. We adopted the ideas of large perturbation of surfac
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Frain, Matthew J. "Investigation of the influence of gas and solid particle interaction on the heat transfer effectiveness of a falling -bed heat exchanger." 2004. https://scholarworks.umass.edu/dissertations/AAI3136726.

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The objective of this investigation is to evaluate the ability of analytical and computational models to describe the momentum and heat transfer between the gas and particles in a falling-bed heat exchanger. Experimental data are presented for a test falling-bed heat exchanger. Measured temperatures, pressures, and overall heat transfer rates are compared to predicted values from analytical and computational models, and the capabilities and deficiencies of these modeling methods are discussed. In addition, the effect of the addition of a particle distributor on the performance of the falling-b
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36

Mondal, Anirban. "A non-classical continuum approach to study the fragmentation of brittle solids." Thesis, 2022. https://etd.iisc.ac.in/handle/2005/5930.

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In this thesis, a non-local continuum approach coupled with the phase-field theory and Jones-Wilkins-Lee (JWL) equation of state (EOS) is proposed to model and simulate blast-induced fracture in brittle materials. Also, we study the evolution of field variables in the underground explosion of steel fiber reinforced concrete (SFRC). For numerical implementation, we have used a non-ordinary state-based peridynamic theory coupled with a diffusive phase-field damage approach. Moreover, JWL EOS from the family of isentropes has been formed, and finally, the constitutive relations have been arrived
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Dieckmann, Gunther Hans. "Gas-solid precipitation reactions in lamellar solids ; Processing effects and substrate interactions in thin films of Bi₂CaSr₂Cu₂O₈₊x." 1988. http://catalog.hathitrust.org/api/volumes/oclc/19365454.html.

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Rafique, Qureshi Muhammad Mushahid. "Flow characteristics and phase interactions of evaporating sprays in gas-solid suspensions." Thesis, 2007. http://library1.njit.edu/etd/fromwebvoyage.cfm?id=njit-etd2007-027.

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39

Mohammadzadeh, Alireza. "Moment method in rarefied gas dynamics: applications to heat transfer in solids and gas-surface interactions." Thesis, 2016. http://hdl.handle.net/1828/7626.

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It is well established that rarefied flows cannot be properly described by traditional hydrodynamics, namely the Navier-Stokes equations for gas flows, and the Fourier’s law for heat transfer. Considering the significant advancement in miniaturization of electronic devices, where dimensions become comparable with the mean free path of the flow, the It is well established that rarefied flows cannot be properly described by traditional hydrodynamics, namely the Navier-Stokes equations for gas flows, and the Fourier's law for heat transfer. Considering the significant advancement in miniaturiz
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40

Lamorena, Rheo B., and Woojin Lee. "THE FORMATION OF CARBON DIOXIDE HYDRATE IN SOLID SUSPENSIONS AND ELECTROLYTES." 2008. http://hdl.handle.net/2429/1155.

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Evaluation of host geologic sediment interactions with carbon dioxide is very important in sequestration strategies. The objective of the study is to experimentally investigate the effects of different soil mineral types on carbon dioxide hydrate formation. At isothermal, isochoric, and isobaric conditions, batch experiments were conducted with different types of solids (bentonite, kaolinite, nontronite, pyrite, and soil) and electrolytes (NaCl, KCl, CaCl2, and MgCl2) to measure carbon dioxide hydrate formation times. A 50 mL pressurized vessel was used for the experiment by bubbling gaseous C
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41

Grassa, F. "Geochemical processes governing the chemistry of groundwater hosted within the Hyblean aquifers." Thesis, 2002. http://hdl.handle.net/2122/416.

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A raingauge network made of six stations was installed in the Hyblean region. Stations were located at different altitudes (from 5 m to 986 m a.s.l.) and along two directions (E-W and SW-NE). Rainwater samples were monthly collected for stable isotope measurements. Spatial distribution of rainwater isotope composition has confirmed the wet air masses move from South-East/South-West toward North. Water balance has highlighted that the annual volume of infiltrating waters is in the range of 1-1.5 *105 m3 Km-2. 82 well waters and 12 spring waters located within the Hyblean Plateau (South-Ester
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