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Tesis sobre el tema "Reactive transport model"

Autor: Grafiati

Publicado: 1 de junio de 2024

Última modificación: 31 de julio de 2025

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1

Spiessl, Sabine Maria. "Development and evaluation of a reactive hybrid transport model (RUMT3D)." [S.l. : s.n.], 2004. http://deposit.ddb.de/cgi-bin/dokserv?idn=974569038.

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2

Gong, Rulan. "Mixing-controlled reactive transport in connected heterogeneous domains." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50365.

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Reactive transport models are essential tools for predicting contaminant fate and transport in the subsurface and for designing effective remediation strategies. Sound understanding of subsurface mixing in heterogeneous porous media is the key for the realistic modeling of reactive transport. This dissertation aims to investigate the extent of mixing and improve upscaling effective macroscopic models for mixing-controlled reactive transport in connected heterogeneous formations, which usually exhibit strongly anomalous transport behavior. In this research, a novel approach is developed for an

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3

Mayer, Klaus Ulrich. "A numerical model for multicomponent reactive transport in variably saturated porous media." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq38256.pdf.

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4

Meile, Christof D. "An inverse model for reactive transport in biogeochemical systems : application to biologically-enhanced pore water transport (irrigation) in aquatic sediments." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/25816.

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5

Srinivasan, C. "Analysis Of Solute Transport In Porous Media For Nonreactive And Sorbing Solutes Using Hybrid FCT Model." Thesis, Indian Institute of Science, 2000. https://etd.iisc.ac.in/handle/2005/218.

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The thesis deals with the numerical modeling of nonreactive and nonlinearly sorbing solutes in groundwater and analysis of the effect of heterogeneity resulting from spatial variation of physical and chemical parameters on the transport of solutes. For this purpose, a hybrid flux corrected transport (FCT) and central difference method based on operator-split approach is developed for advection-dispersion solute transport equation. The advective transport is solved using the FCT technique, while the dispersive transport is solved using a conventional, fully implicit, finite difference scheme.

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6

Srinivasan, C. "Analysis Of Solute Transport In Porous Media For Nonreactive And Sorbing Solutes Using Hybrid FCT Model." Thesis, Indian Institute of Science, 2000. http://hdl.handle.net/2005/218.

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The thesis deals with the numerical modeling of nonreactive and nonlinearly sorbing solutes in groundwater and analysis of the effect of heterogeneity resulting from spatial variation of physical and chemical parameters on the transport of solutes. For this purpose, a hybrid flux corrected transport (FCT) and central difference method based on operator-split approach is developed for advection-dispersion solute transport equation. The advective transport is solved using the FCT technique, while the dispersive transport is solved using a conventional, fully implicit, finite difference scheme.

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7

Jonsson, Karin. "Effect of Hyporheic Exchange on Conservative and Reactive Solute Transport in Streams : Model Assessments Based on Tracer Tests." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3522.

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8

Bullara, Domenico. "Nonlinear reactive processes in constrained media." Doctoral thesis, Universite Libre de Bruxelles, 2015. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209073.

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In this thesis we show how reactive processes can be affected by the presence of different types of spatial constraints, so much so that their nonlinear dynamics can be qualitatively altered or that new and unexpected behaviors can be produced. To understand how this interplay can occur in general terms, we theoretically investigate four very different examples of this situation. <p><p>The first system we study is a reversible trimolecular chemical reaction which is taking place in closed one-dimensional lattices. We show that the low dimensionality may or may not prevent the reaction from rea

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9

Yu, Jing. "A THREE-DIMENSIONAL BAY/ESTUARY MODEL TO SIMULATE WATER QUALITY TRANSPORT." Master's thesis, University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2434.

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This thesis presents the development of a numerical water quality model using a general paradigm of reaction-based approaches. In a reaction-based approach, all conceptualized biogeochemical processes are transformed into a reaction network. Through the decomposition of species governing equations via Gauss-Jordan column reduction of the reaction network, (1) redundant fast reactions and irrelevant kinetic reactions are removed from the system, which alleviates the problem of unnecessary and erroneous formulation and parameterization of these reactions, and (2) fast reactions and slow reaction

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10

Wang, Cheng. "AN INTEGRATED HYDROLOGY/HYDRAULIC AND WATER QUALITY MODEL FOR WATERSHED-SCALE SIMULATIONS." Doctoral diss., University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2529.

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This dissertation presents the design of an integrated watershed model, WASH123D version 3.0, a first principle, physics-based watershed-scale model of integrated hydrology/hydraulics and water quality transport. This numerical model is comprised of three modules: (1) a one-dimensional (1-D) simulation module that is capable of simulating separated and coupled fluid flow, sediment transport and reaction-based water quality transport in river/stream/canal networks and through control structures; (2) a two-dimensional (2-D) simulation module, capable of simulating separated and coupled fluid flo

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11

Brown, James Gary, and James Gary Brown. "Movement of metal contaminants in ground water in the Pinal Creek Basin, Arizona: model assessment and simulation of reactive transport." Thesis, The University of Arizona, 1996. http://hdl.handle.net/10150/626839.

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Copper-mining activities in the Pinal Creek basin have generated a plume of acidic ground water in the regional aquifer in Pinal Creek basin. From 1984 to 1994, contaminant concentrations decreased in response to contaminant source removal, remedial pumping, and uncontaminated recharge. Two multi-species reactive transport models, PHREEQC and HYDROGEOCHEM, were assessed to determine which would best aid in analysis of physical and chemical processes that control contaminant concentrations. Only PHREEQC successfully simulated transport accompanied by oxidation-reduction reactions.

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12

Abdelal, Qasem M. "Methodology for Using a Non-Linear Parameter Estimation Technique for Reactive Multi-Component Solute Transport Modeling in Ground-Water Systems." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/29758.

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For a numerical or analytical model to be useful it should be ensured that the model outcome matches the observations or field measurements during calibration. This process has been typically done by manual perturbation of the model input parameters. This research investigates a methodology for using non linear parameter estimation technique (the Marquardt-Levenberg technique) with the multi component reactive solute transport model SEAM3D. The reactive multi-component solutes considered in this study are chlorinated ethenes. Previous studies have shown that this class of compounds can be degr

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13

Volta, Chiara. "Carbon cycling at the estuarine interface: a new model for regional and global scale assessment." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/228693.

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The overarching goal of this thesis is to develop a diagnostic and predictive model to quantify the estuarine CO2 dynamics across scales – from catchment to the globe – using an approach that explicitly resolves the strong physical and biogeochemical gradients typically observed in these systems.Chapter 1 provides fundamental definitions and descriptions of estuaries, as well as an assessment of their role in the global carbon cycle. It also raises the specific objectives and research questions tackled in the present study. Chapter 2 presents the rationale behind the novel modelling approach (

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14

Amankwah, Edward Akwasi. "Predictive Modeling of Organic Pollutant Leaching and Transport Behavior at the Lysimeter and Field Scales." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2007. http://nbn-resolving.de/urn:nbn:de:swb:14-1195122485300-99209.

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Soil and groundwater pollution has become a global issue since the advent of industrialization and mechanized agriculture. Some contaminants such as PAHs may persist in the subsurface for decades and centuries. In a bid to address these issues, protection of groundwater must be based on the quantification of potential threats to pollution at the subsurface which is often inaccessible. Risk assessment of groundwater pollution may however be strongly supported by applying process-based simulation models, which turn out to be particularly helpful with regard to long-term predictions, which cannot

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15

Alarcon, Leon Edgardo. "Pyrite weathering and lithium (Li?) transport under unsaturated flow conditions in model and mine-tailing systems." University of Western Australia. School of Earth and Geographical Sciences, 2005. http://theses.library.uwa.edu.au/adt-WU2006.0011.

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[Truncated abstract] As mineral deposits continue to be mined, the non economic gangue materials such as sulphides (e.g. pyrite) that are extracted as part of the ore body or overburden are deposited within the waste rock and/or milled tailings. As a result of natural weathering processes, these reactive materials represent a potential hazard to surrounding environments. A major consequence, resulting from mine-waste impoundments containing sulphidic materials, relates to the offsite movement of low pH leachates containing elevated concentrations of metal ions posing a contamination threat. Th

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16

Lu, Jun. "Développement de modèles prédictifs décrivant le couplage chimie-transport dans les sédiments naturels." Thesis, Poitiers, 2013. http://www.theses.fr/2013POIT2287/document.

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La gestion de sols ou sédiments contaminés par des métaux nécessite de pouvoir prédire la migration de ces métaux, dont la mobilité dépend des propriétés de transport du milieu ainsi que de la réactivité chimique de celui-ci (principalement réactions sorption/désorption). Pour étudier l'adsorption des cations métalliques (majeurs et traces) en condition dynamique, des expériences de transport en colonne ont été réalisées avec un sol pauvre en minéraux carbonatés et en matière organique. Considérant que la réactivité de ce sol était due essentiellement à la phase argileuse smectitique, un modèl

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17

Seigneur, Nicolas. "A coupled experimental, numerical and statistical homogenization approach towards an accurate feedback relationship between porosity and diffusive properties of model cementitious materials in the field of reactive transport modelling." Doctoral thesis, Universite Libre de Bruxelles, 2016. https://dipot.ulb.ac.be/dspace/bitstream/2013/237928/3/TDM.pdf.

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Au vu de leurs différentes propriétés, les matériaux cimentaires sont largement considérés dans les différents projets de gestion de déchets radioactifs. Leurs propriétés mécaniques, leurs faibles coefficients de transport ainsi que leur capacité à fixer les principaux radionucléides sont les principaux avantages qui en font un des meilleurs choix pour la conception des barrières ouvragées.Pour les études de sûreté, leur durabilité est capitale. Au cours de la vie d’un tel dépôt,via l’infiltration d’eau ou les interfaces chimiquement agressives avec les argiles, les différents matériaux vont s

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18

Kamtchueng, Toko. "Formulation généralisée du transport réactif pour les modèles de réseaux de pores saturés en eau." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2087/document.

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La protection et la remédiation des ressources en eau sont un enjeu sociétal majeur, ainsi il est nécessaire de comprendre l’évolution de solutés, tels les polluants, au sein de la zone saturée et non saturée. Dans ce but, de nombreux travaux ont été consacrés à la modélisation du transport réactif en milieux poreux. Son déroulement à l’échelle de Darcy dépend des hétérogénéités microscopiques du milieu. Les modèles de réseau de pores qui simplifient la géométrie en un ensemble de pores reliés par des liens de sections constantes, permettent de se placer à une échelle mésoscopique, faisant le

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19

Mertz, Samuel. "Devenir de contaminants métalliques (Pb, Zn) depuis un dépôt minier ancien : développement d'un modèle de transport réactif." Electronic Thesis or Diss., Orléans, 2021. http://www.theses.fr/2021ORLE3152.

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Cette thèse s'inscrit dans le cadre de la gestion des anciens sites miniers contaminés en métaux et de leur effet sur l'environnement. L'objectif de cette thèse réside dans la détermination et la hiérarchisation des processus régulant le transfert des métaux au sein de résidus miniers anciens, via le développement d’un modèle de transport réactif (RTM). Premièrement, un modèle biogéochimique a été construit pour définir les processus contrôlant la mobilité de Pb/Zn issus de résidus miniers. Ce modèle a été développé via des données expérimentales de lixiviation en microcosmes acquises d’une pr

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20

Bouissonnie, Arnaud. "Les cinétiques de dissolution : de l'approche mécaniste à l'échelle atomique à la description macroscopique à l'échelle centrimétrique." Thesis, Strasbourg, 2019. http://www.theses.fr/2019STRAH013.

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Les cinétiques de dissolution représentent un composant majeur des flux de matière sur Terre. Lors de cette thèse, plusieurs facteurs pouvant impacter la dissolution ont été étudiés afin de lier différentes échelles spatiales. Cette thèse reporte l’étude de la dissolution de minéraux modèles (enstatite et calcite) de l’échelle de l’atome à celle de la face pour le premier, et de celle de la face à celle du milieu poreux pour le deuxième. L’anisotropie de dissolution observée expérimentalement sur l’enstatite a pu être reproduite à l’aide d’un modèle probabiliste des ruptures de liaisons. L’int

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21

Pika, Philip. "Exploring the regional and global patterns in organic matter reactivity and its influence on benthic biogeochemical dynamics." Doctoral thesis, Universite Libre de Bruxelles, 2020. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/305204.

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Marine sediments are a key component of the global carbon cycle and climate system. They host one of the largest carbon reservoirs on Earth, provide the only long-term sink for atmospheric CO2, recycle nutrients and represent the most important climate archive. Early diagenetic pro- cesses in marine sediments are thus central to our understanding of past, present and future biogeochemical cycling and climate. Because all early diagenetic processes can be directly or indirectly linked back to the degradation of organic matter (OM), advancing this understand- ing requires disentangling the diffe

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22

Socié, Adrien. "Modélisation chimio-mécanique de la fissuration de matériaux cimentaires : vieillissement et tenue des enceintes de confinement des centrales nucléaires." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS102.

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L'Institut de Radioprotection et de Sûreté Nucléaire (IRSN) s'intéresse à l'étude des réactions de gonflement interne, dont les Réactions Sulfatiques, et à leur impact sur l'évolution des propriétés du matériau cimentaire. Les Réactions Sulfatiques sont caractérisées par la précipitation de l'ettringite, dans les pores du matériau durci entraînant des gonflements locaux et une fissuration par déformations différentiées. Les fissures créées constituent alors le lieu privilégié de la précipitation d'ettringite et accélèrent le transport des espèces chimiques au sein du milieu poreux. La modifica

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23

McLaughlin, Jared D. "Parallel Processing of Reactive Transport Models Using OpenMP." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2328.pdf.

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24

Amikiya, Emmanuel Adoliwine. "Flow and reactive transport processes in porous media." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/85838.

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Thesis (MSc)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: Flow and reactive transport of chemical species is a very common phenomenon that occurs in natural and artificial systems. However in this study, the topic is related to acid mine drainage in the South African mining environment. Due to the hazards associated with acid mine drainage, prevention or treatment of mine effluent water before discharging to receiving waters and other environments is a necessity. A new time-dependent mathematical model is developed for a passive treatment method, based on multi-scale modelling of

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25

Peter, Anita. "Assessing natural attenuation at field scale by stochastic reactive transport modelling." Tübingen : Universität Tübingen, 2002. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10236383.

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26

Kuzovkov, Vladimir, Guntars Zvejnieks, Olaf Kortlüke, and Niessen Wolfgang von. "Forced oscillations in self-oscillating surface reaction models." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-195406.

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27

Ilas, Danut. "Coarse mesh transport theory model for heterogeneous systems." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/16089.

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28

Oates, Peter M. (Peter Michael) 1977. "Upscaling reactive transport in porous media : laboratory visualization and stochastic models." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39353.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2007.<br>Includes bibliographical references.<br>Solute transport models are essential tools for understanding and forecasting chemical concentrations in groundwater. Advection-dispersion based models can adequately predict spatial averages of conservative solute concentrations without using explicit maps of pore structures or variations in hydraulic conductivity. However, coupling advection-dispersion based transport models to chemical reaction models is inaccurate because it implicitly assum

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29

Kuzovkov, Vladimir, Guntars Zvejnieks, Olaf Kortlüke, and Niessen Wolfgang von. "Forced oscillations in self-oscillating surface reaction models." Diffusion fundamentals 2 (2005) 27, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14357.

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30

Stojanovic, Severin. "Numerical Reaction-transport Model of Lake Dynamics and Their Eutrophication Processes." Thesis, Université d'Ottawa / University of Ottawa, 2011. http://hdl.handle.net/10393/20231.

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A 1D numerical reaction-transport model (RTM) that is a coupled system of partial differential equations is created to simulate prominent physical and biogeochemical processes and interactions in limnological environments. The prognostic variables considered are temperature, horizontal velocity, salinity, and turbulent kinetic energy of the water column, and the concentrations of phytoplankton, zooplankton, detritus, phosphate (H3PO4), nitrate (NO3-), ammonium (NH4+), ferrous iron (Fe2+), iron(III) hydroxide (Fe(OH)3(s)), and oxygen (O2) suspended within the water column. Turbulence is modelle

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31

Stallmach, Frank, and Sven Crone. "Analytical model for extrapolation of experimental NMR diffusion studies to reaction conditions for formulated catalyst particles." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-196682.

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32

Chung, Nga-hang, and 鍾雅行. "Large-eddy simulation of transport of inert and chemically reactive pollutants over 2D idealized street canyons." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2011. http://hub.hku.hk/bib/B47849903.

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In view of the worsening air quality in the world, more concerns are focused on the environment. This thesis uses the technique of CFD and develops the computer model to investigate the wind and pollutant transport, as well as the chemistry of reactive pollutants in idealized two-dimensional (2D) street canyons. Three scientific questions are raised in this thesis. The first task is to find out the po- sition with the most favorable pollutant removal along the ground level over 2D idealized street canyon of different building-height-to-street-width (aspect) ratios (ARs). The di- mensio

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33

Al-Naji, Majd, Michael Goepel, Anca Roibu, and Roger Gläser. "Reduction of p-Nitrophenol to p-Aminophenol over supported monometallic catalysts as a model reaction for mass-transfer investigations." Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-197993.

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34

Al-Naji, Majd, Michael Goepel, Anca Roibu, and Roger Gläser. "Reduction of p-Nitrophenol to p-Aminophenol over supported monometallic catalysts as a model reaction for mass-transfer investigations: Reduction of p-Nitrophenol to p-Aminophenol over supportedmonometallic catalysts as a model reaction for mass-transferinvestigations." Diffusion fundamentals 24 (2015) 2, S. 1, 2015. https://ul.qucosa.de/id/qucosa%3A14515.

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35

Stallmach, Frank, and Sven Crone. "Analytical model for extrapolation of experimental NMR diffusion studies to reaction conditions for formulated catalyst particles." Diffusion fundamentals 2 (2005) 105, S. 1-2, 2005. https://ul.qucosa.de/id/qucosa%3A14443.

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36

Rodrigo, Moreno Ana. "Study of reactive oxygen species-induced ion transport in different models by using electrophysiological approaches." Doctoral thesis, Universitat Autònoma de Barcelona, 2012. http://hdl.handle.net/10803/96712.

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En esta tesis doctoral se analiza el papel del estrés oxidativo en el transporte iónico en distintos modelos, mediante técnicas de imagen y de electrofisiología. El trabajo se subdivide en cuatro capítulos. El primero, a modo de marco teórico, introduce el transporte iónico en condiciones de estrés oxidativo. La interacción entre especies reactivas de oxígeno (ROS) y el transporte iónico ha sido poco estudiada hasta el momento, por lo que los principales objetivos de la tesis se han centrado en el estudio del transporte iónico en condiciones de estrés oxidativo en diferentes modelos, con la

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37

Sanz, Prat Alicia [Verfasser], and Olaf [Akademischer Betreuer] Cirpka. "Validation of Travel- and Exposure-Time Based Nonlinear Reactive Transport Models / Alicia Sanz Prat ; Betreuer: Olaf Cirpka." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1198120940/34.

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Sanz-Prat, Alicia [Verfasser], and Olaf [Akademischer Betreuer] Cirpka. "Validation of Travel- and Exposure-Time Based Nonlinear Reactive Transport Models / Alicia Sanz Prat ; Betreuer: Olaf Cirpka." Tübingen : Universitätsbibliothek Tübingen, 2016. http://d-nb.info/1198120940/34.

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39

Schankat, Mirko. "DiaTrans a multi-component model for density-driven flow, transport and biogeochemical reaction processes in the subsurface." Aachen Shaker, 2009. http://d-nb.info/1003412742/04.

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40

Molins, Rafa Sergi. "Using the Dusty Gas Model to investigate reaction-induced multicomponent gas and solute transport in the vadose zone." Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/431.

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Biogeochemical reactions and vadose zone transport, in particular gas phase transport, are inherently coupled processes. To explore feedback mechanisms between these processes in a quantitative manner, multicomponent gas diffusion and advection are implemented into an existing reactive transport model that includes a full suite of geochemical reactions. Multicomponent gas diffusion is described based on the Dusty Gas Model, which provides the most generally applicable description for gas diffusion. Gas advection is described by Darcy's Law, which in the current formulation, is directly substit

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41

Wei, Chao. "Modeling the effects of heterogeneous reactions on atmospheric chemistry and aerosol properties." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/903.

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In this thesis, a new aerosol module is developed for the STEM model (the Sulfur Transport and dEposition Model) to better understand the chemical aging of dust during long range transport and assess the impact of heterogeneous reactions on tropospheric chemistry. The new aerosol module is verified and first applied in a box model, and then coupled into the 3-Dimentional STEM model. In the new aerosol model, a non-equilibrium (dynamic or kinetic) approach to treat gas-to-particular conversion is employed to replace the equilibrium method in STEM model. Meanwhile, a new numerical method solving

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42

Gilmore, Paul. "Regulation of Oxygen Transport in Potassium-Oxygen Batteries Using Conducting Polymers." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555588196317105.

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43

Schankat, Mirko [Verfasser]. "DiaTrans – A Multi-Component Model for Density-Driven Flow, Transport and Biogeochemical Reaction Processes in the Subsurface / Mirko Schankat." Aachen : Shaker, 2010. http://d-nb.info/1124364145/34.

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44

Allain, Florent. "Evaluation of the Classical Reaction Engineering models in terms of mass transport and reaction rate distribution for low tube-to-particle diameter ratio beds." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/374.

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Packed bed reactors are widely used in the chemicals industry and have been studied carefully in the last century. Several reaction engineering models have been developed in order to predict the behavior of such reactors under specified conditions, in order to assist in the sizing during an industrial process conception. These reactors can be categorized using different parameters, and the bed-to- particle diameter ratio - N - is one of them. It has been shown that this parameter influences greatly the transfer phenomena that occur in the bed, and that for ratios under 10, particular attention

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Kuljabekov, Alibek. "Analytical and numerical models of chemical leaching with gypsum precipitation in porous media." Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0369/document.

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Dans cette thèse, nous développons le modèle phénoménologique optimisé de lessivage chimique in situ (ISL) de l'uranium par l'injection d'acide sulfurique, en prenant en compte la précipitation des espèces non-solubles telles que le gypse, qui réduisent la récupération de l'uranium. Le modèle proposé décrit le transport de masse avec des réactions chimiques hétérogènes entre le liquide et les roches solides, qui mènent à la dissolution des oxydes d'uranium et à la récupération de l'uranium sous forme liquide. Ce modèle comprend à la fois des réactions utiles, qui décrivent la dissolution de di

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Orellana, Esbel Tomás Valero. "Um modelo de duas escalas da resposta elétrica de tecido muscular induzida por ativação de mastócitos." Laboratório Nacional de Computação Científica, 2010. http://www.lncc.br/tdmc/tde_busca/arquivo.php?codArquivo=205.

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O estudo dos mecanismos que desencadeiam as reações alérgicas é um tema de grande interesse científico na atualidade. A anafilaxia, reação alérgica sistêmica severa, tem ocupado um lugar de destaque nas pesquisas. Diferentes experimentos em laboratório, tanto in vivo quanto in vitro, assim como diferentes modelos matemáticos baseados nos resultados experimentais, têm procurado investigar a participação ou não dos mastócitos nesse mecanismo. No entanto, os resultados obtidos não são conclusivos, dividindo a comunidade científica em dois grupos: os que consideram determinante o papel dos mastóci

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Kamarajugadda, Sai K. "Advanced Models for Predicting Performance of Polymer Electrolyte Membrane Fuel Cells." The Ohio State University, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=osu1323758118.

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Pistikopoulos, Panayotis. "Comportement physiochimique des hydrocarbures aromatiques polycycliques, particulaires et gazeux, dans l'atmosphere : mode de formation des aerosols, transport a meso-echelle, adaptation d'un modele-recepteur a des composes reactifs." Paris 7, 1988. http://www.theses.fr/1988PA077140.

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Negm, Hani Hussein. "Studies on the Optimum Geometry for a Nuclear Resonance Fluorescence Detection System for Nuclear Security Applications." Kyoto University, 2014. http://hdl.handle.net/2433/193589.

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Benzakour, Bouchra. "Ultramicroélectrochimie analytique : étude des phénomènes de transport de matière lors des réactions électrochimiques : application aux réactions engageant des étapes successives." Nancy 1, 1993. http://www.theses.fr/1993NAN10004.

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Les techniques ultramicroélectrochimiques engageant des électrodes de très faibles dimensions ont été appliquées à l'étude des phénomènes de transport de matière en absence d'électrolyte support lors des réactions électrochimiques. L'analyse des effets de migration a porté d'abord sur des transformations électrochimiques engageant une seule étape. Le comportement des systèmes i-/i#3#, br#/br#3#, br#/br#2 et le système du diphenylpicrylhydrazyle dpph-/dpph dans les solvants organiques a été précisé. La variation des courants limites en présence ou absence d'électrolyte a pu être quantifiée simp

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