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Myagkiy, Andrey. "Mineralization of Nickel in saprolitic ore of New Caledonia : Dynamics of metal transfer and modeling of coupled geochemical and hydrodynamic processes". Thesis, Université de Lorraine, 2017. http://www.theses.fr/2017LORR0277/document.
Pełny tekst źródłaNew Caledonia hosts significant lateritic nickel reserves, and presently became the fifth largest Ni producer in the world. These deposits are generally thought to be closely as- sociated with the intense chemical and mechanical weathering of peridotite bedrock that is a principal source of nickel. Thus, the main ore genesis model for Ni ores in New Caledonia is based on a single per descensum model where most elements (Mg, Ni, and Si) are leached from the surface, particularly, during lateritic soil development. Nickel is then concentrated either in the fine-grained laterite where goethite is the main Ni bearer, the so-called ’lateritic ore’, or below the laterites, in the saprolite level, where nickel occurs as goethite and several types of Mg-Ni silicates, in particular kerolite. Recent mineralogical and structural observations together with mining data have revealed a lot of different types of heterogeneities associated with the distribution and mineralogy of Ni bearing minerals. Therefore, in depth investigations of Ni mobility, its retardation processes along with its governing chemical and hydrodynamic parameters are of big importance for understanding and subsequent prediction of Ni distribution in profiles of New Caledonia. Such an investigation is an objective of the present work. The concept is based on the development of i) a powerful 1D model with particular emphasis on Ni geochemical behavior during ophiolite weathering, its comparison with in situ observations, and detailed understanding of trace elements mobility, and ii) 2D hydro-geochemical model coupled with complex hydrodynamics, that would additionally provide new insight into the structural control on Ni redistribution and mineralization. While the 1D simulations provide a remarkable result for understanding the chemical features that drive Ni retention processes in a profile, 2D model appears to be a powerful tool for understanding how local Ni-enrichments may form. The results of this model show the reactivation of Ni from upper horizons and its concentration in neo-formed silicates in bottom of the saprolite. The reactivated Ni comes mostly from the saprolite horizon due to the redissolution of previously formed Ni-bearing silicates and still persisting in this olivine zone. Modeling has revealed minor contribution of the laterite horizon (Ni-oxi-hydroxides) into the Ni remobilization. The lateral infiltration of water with remobilized Ni from areas such as topographic highs to downstream slope areas leads to the formation of richest deposits in this lower part of profile. The manner of redistribution is fully governed by the topographic slopes, orientation and position of the fractures. Presented models appear to be of importance in attempt of explanation of Ni mineralization processes, revealing the main keys to understanding the control of trace elements mobility in ultramafic environment. The latter gives new insights into the Ni distribution in present day profiles and, therefore, may greatly help in mineral prospecting and forecasting the distribution of future resources
Décultot, Léa. "Étude et modélisation du procédé de refusion par plasma d’arc en creuset froid (PAMCHR) d’alliages de titane pour des applications aéronautiques". Electronic Thesis or Diss., Université de Lorraine, 2021. http://www.theses.fr/2021LORR0031.
Pełny tekst źródłaThe recycling of titanium scraps can be achieved using the Plasma Arc Melting Cold Hearth Refining (PAMCHR) process with the aim of producing aeronautical titanium alloy ingots. In this manuscript, the research work focuses on the refining stage of the process where the liquid is transported in a horizontal copper water-cooled crucible. This important step takes place downstream the melting of the charge and upstream the casting of liquid titanium into the ingot mold crucible. Plasma torches are used as heat source of PAMCHR process, which is conducted under an atmosphere of inert gas. A three-dimensional modeling of the thermo-hydrodynamic flow of the titanium alloy has been set up based on Ansys-Fluent CFD software. The purpose of this tool, named PAM3D, is to improve our understanding of the liquid titanium behavior within the refining crucible. A large number of user functions have been integrated into the model to describe, among other mechanisms, the thermal and momentum transferred from the plasma plume to the surface of the liquid bath. The analysis of these transfers is essential for modeling the process. They are obtained by a study coupling melting tests, carried out in a pilot PAMCHR furnace, and numerical modeling. Numerical results, obtained by this first version of PAM3D are compared to experimental measurements, and the agreement is satisfactory. However, the maximum value of the shear stress, due to the impact of the plasma plume on the bath surface, implemented in the model seems to be underestimated. Moreover, complementary simulations highlight the important role of hydrodynamic forces on the thermal behavior of the bath, and in particular of this shear stress
Raturi, Sagar. "Energetics and structural aspects of cation-coupled drug transport by NorM multidrug transporters". Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/284914.
Pełny tekst źródłaRoche, Benoît. "Transport électronique à travers deux dopants, en régime statique et dynamique dans des transistors silicium". Phd thesis, Université de Grenoble, 2012. http://tel.archives-ouvertes.fr/tel-00947330.
Pełny tekst źródłaIppisch, Olaf. "Coupled transport in natural porous media". [S.l. : s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=96376022X.
Pełny tekst źródłaIppisch, Olaf. "Coupled transport in natural porous media". [S.l. : s.n.], 2003. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB10605053.
Pełny tekst źródłaKronbichler, Martin. "Computational Techniques for Coupled Flow-Transport Problems". Doctoral thesis, Uppsala universitet, Avdelningen för teknisk databehandling, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-162215.
Pełny tekst źródłaMavkov, Bojan. "Control of coupled transport in Tokamak plasmas". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAT004/document.
Pełny tekst źródłaThe objective of this thesis is to propose new methods for analysis and control of partial differential equations that describe the coupling between the transport models of the electron pressure (density multiplied by the temperature) and the magnetic flux in the tokamak plasma. The coupled system is presented by two1D resistive diffusion equations. In this thesis two kinds of control models are obtained. The first is a first-principle driven model and the second one is the data-driven model obtained using system identification techniques. The control design is based on an infinite dimensional setting using Lyapunov analysis. Composite control is designed using singular perturbation theory to divide the fast from the slow component. All the theoretical work is implemented and benchmarked in advanced physics based on simulations using plasma simulator dor DIII-D, ITER and TCV tokamaks
Simpson, Brent W. "Genetic investigation of how an ATP hydrolysis cycle is coupled to lipopolysaccharide transport". The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523988371297363.
Pełny tekst źródłaBouyssier, Julien. "Transports couplés en géométries complexes". Toulouse 3, 2012. http://thesesups.ups-tlse.fr/1929/.
Pełny tekst źródłaThis work interest is about stationary transfer and non-stationary transport by convection-diffusion onto complex geometries. For transport issues, complex refers to convection into flattened cavity of arbitrary transverse shape, slowly varying along the longitudinal direction. In the context of transfer, complex refers to non-axisymmetric domains of arbitrary transverse shape along which one or several parallel tubes convect heat or mass. For the transfer problem, this work extends the principle, validates the use, and illustrates the efficiency of Graetz modes decompositions for exchanges prediction in realistic exchangers configurations. This decomposition permits to formulate the initial 3D problem as a generalysed 2D eigenvalue problem, the numerical evaluation of which is drastically reduced. We generalyze Graetz modes solutions for arbitrary applied lateral boundary conditions. In the particular case of balanced exchangers, we bring to the fore a new neutral mode whose longitudinal variations are linear as opposed to classical Graetz modes displaying exponential decay. The numerical computation of those modes for semi-infinite configurations with lateral periodic boundary conditions shows that a few number of those provides a very good approximation for exchanges. In the case of finite exchangers coupled with inlet/oulet tubes, we show how to evaluate the amplitudes of Graetz modes in the various domains (inlet, exchanger, outlet) from functional minimization associated with input/output boundary conditions. The evaluation of these amplitudes permit a systematic parametric study of temperature fields, heat fluxes between fluid and solid, and hot/cold performance of a couple-tube exchanger. Our results indicate that the typical exchange length is governed by the first Graetz mode at large P\'eclet number. We also show that a symmetric exchanger has a symmetric spectrum and a upward/backward symmetric evolution. In the case transport we elaborate theoretically the conservative form of 3D Taylor dispersion equations into variable cavities which generalyzes the framework already known in 2D. We numerically implement these averaged dispersion equations with finite element, and validate in 2D the obtained results. We show that 3D longitudinal variations of a cavity has a strong impact on the longitudinal dispersion
Rashid, Mohammad Zunaidur. "ATOMISTIC MODELING OF COUPLED ELECTRON-PHONON TRANSPORT IN NANOSTRUCTURES". OpenSIUC, 2021. https://opensiuc.lib.siu.edu/dissertations/1939.
Pełny tekst źródłaInzoli, Isabella, Signe Kjelstrup, Dick Bedeaux i Jean-Marc Simon. "The coupled transport of heat and mass across a silicalite surface". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-189575.
Pełny tekst źródłaLarisch, Wolfgang. "4 Coupled compartments – an analytical solution for diffusion and reaction kinetics". Universitätsbibliothek Leipzig, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-198373.
Pełny tekst źródłaJakobsson, Håkan. "Discontinous Galerkin Methods for Coupled Flow and Transport problems". Thesis, Umeå universitet, Institutionen för matematik och matematisk statistik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-51335.
Pełny tekst źródłaCastleton, I. M. "Electron transport in coupled one- and two-dimensional systems". Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.597365.
Pełny tekst źródłaGunduz, Orhan. "Coupled flow and contaminant transport modeling in large watersheds". Diss., Available online, Georgia Institute of Technology, 2004:, 2004. http://etd.gatech.edu/theses/available/etd-04092004-160146/unrestricted/gunduz%5Forhan%5F200405%5Fphd.pdf.
Pełny tekst źródłaDr. Paul Work, Committee Member ; Dr. Philip Roberts, Committee Member ; Dr. Mustafa Aral, Committee Chair ; Dr. Terry Sturm, Committee Member ; Dr. Turgay Uzer, Committee Member. Vita. Includes bibliographical references (leaves 442-466).
Xie, (Lily) Hong 1965. "Contaminant transport coupled with nonlinear biodegradation and nonlinear sorption". Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290676.
Pełny tekst źródłaBendjebbar, Fatna. "Modélisation hydrodynamique d'une torche à plasma couplée inductivement". Thesis, Clermont-Ferrand 2, 2013. http://www.theses.fr/2013CLF22340/document.
Pełny tekst źródłaThe purpose of the work was the numerical modeling of the inductive coupling plasma torch. (ICP). We have established the necessary databases: composition, thermodynamic and transport properties applied to argon mixtures of nitric acid and water. The hydrodynamic model of the ICP torch (7 coils) considers the plasma at thermodynamic equilibrium and uses the Navier-Stokes equations to describe the plasma flow and the Maxwell equations to describe the evolution of the electric field and the magnetic field
Armstrong, Gillian. "Solute transport and intracellular pH in intestinal epithelial cells". Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320390.
Pełny tekst źródłaDi, Giulio Eugenio <1986>. "Improvement of photon transport model by including coupled photon-electron transport and kernel refinement". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6954/1/Eugenio_Di_Giulio_tesi.pdf.
Pełny tekst źródłaDi, Giulio Eugenio <1986>. "Improvement of photon transport model by including coupled photon-electron transport and kernel refinement". Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/6954/.
Pełny tekst źródłaSrinivasan, Venkatraman. "Analytical solutions for sequentially coupled multi-species reactive transport problems". Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/SRINIVASAN_VENKATRAMAN_13.pdf.
Pełny tekst źródłaAbstract. Vita. "This thesis has produced the following three journal publications: 1) V. Srinivasan, T.P. Clement, and K.K. Lee. "Domenico solution -- Is it valid?", Ground Water, 25(2): 136-146, May 2007 ; 2) V. Srinivasan and T.P. Clement. "Analytical solutions for sequentially coupled reactive transport problems. Part I: Mathematical derivations", submitted May 2007, Advances in Water Resources ; 3) V. Srinivasan and T.P. Clement. "Analytical solutions for sequentially coupled reactive transport problems. Part II: Special cases, implementation and testing", submitted May 2007, Advances in Water Resources." -- From p. v. Includes bibliographic references (ℓ. 91-98)
Chang, Eric Kenneth. "Coupled sorption and transport of nonionic surfactants in natural soils". Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/21257.
Pełny tekst źródłaYoung, Carolyn. "Transport and charge sensing measurements of coupled quantum dot devices". Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106374.
Pełny tekst źródłaNous etudions la mesure de points quantiques doubles (DQDs), specifiquement le transport electronique et la detection de charge. Plusieurs propositions ont ete avancees pour des qubits bases sur les DQDs, qui rend ces systèmes interessants du point de vue du calcul quantique a l'etat solide. Cette these comprend trois etudes theoriques au sujet de la generation d'erreurs lors de la mesure des qubits DQD. Premierement, nous considerons les mesures de transport, et calculons la contribution a la conductance DQD des processus cotunneling impliquant l'occupation virtuelle des etats excites. Nous presentons une methode numerique efficace, basee sur le formalisme tight-binding, pour le calcul de la transmission DQD associee avec le cotunneling a deux electrons. Nous etudions l'effet des interactions electron-electron dans un modele d'interaction constante et, en traitant la puissance de tunnel entre les QDs exactement, examinons la limite de couplage fort. Nous generons des cartes de conductance theoriques qui refletent une vaste region de l'espace des parametres, et qui nous permettent de comparer l'incidence de cotunneling dans une variete de regimes electrostatiques. Ensuite, nous concentrons sur des mesures de detection de charge, et etudions le backaction Heisenberg associee a la mesure par un contact de point quantique (QPC). Nous montrons que la source fondamentale de backaction est du au bruit de charge du QPC, plutot que le bruit de courant. Nous formulons une borne inferieure rigoureuse pour l'ampleur du bruit de charge, et calculons les taux correspondants aux transitions inelastiques dans un qubit de charge DQD. Par ailleurs, nous montrons que les mecanismes de backaction associes avec le bruit de charge et de courrant, respectivement, peuvent en principe etre distingues quand le QPC est non-adiabatique. Nous appliquons egalement nos resultats au cas de qubits de spin, ou il y a deux electrons dans le DQD et la mesure est effectuee par la conversion entre spin et charge, et estimons les temps de relaxation et de decoherence correspondants.Finalement, nous etudions un effet backaction indirect associe a la lecture par un QPC. Dans notre modele, le bruit de charge du QPC sert a chauffer localement un bain de phonons, ce qui le conduit hors de l'equilibre. Ensuite, les phonons voyagent du QPC au DQD, ou ils sont absorbes de maniere resonante par le qubit, conduisant des transitions inelastiques. Ces transitions montrent une periodicite distincte en fonction de la frequence. De fortes oscillations dans l'occupation du DQD ont recemment ete mesurees experimentalement par deux groupes independants. Nous montrons que le couplage entre le bain de phonons et la charge du QPC peut conduire les phonons a concentrer, ce qui ameliore l'absorption de phonons resonants et produit l'effet vu au laboratoire.
Rjagopal, Ramasubramaniam. "Correlated single electron transport in capacitively coupled tunnel junction arrays /". view abstract or download file of text, 1999. http://wwwlib.umi.com/cr/uoregon/fullcit?p9957570.
Pełny tekst źródłaTypescript. Includes vita and abstract. Includes bibliographical references (leaves 95-97). Also available for download via the World Wide Web; free to University of Oregon users. Address:http://wwwlib.umi.com/cr/uoregon/fullcit?p9957570.
Ripplinger, Scott. "Development of a Coupled Fluid and Colloidall Particle Transport Model". DigitalCommons@USU, 2013. https://digitalcommons.usu.edu/etd/2041.
Pełny tekst źródłaLarisch, Wolfgang. "4 Coupled compartments – an analytical solution for diffusion and reaction kinetics". Diffusion fundamentals 24 (2015) 32, S. 1, 2015. https://ul.qucosa.de/id/qucosa%3A13497.
Pełny tekst źródłaLefevre, Benoit. "La soutenabilité environnementale des transports urbains dans les villes du sud : Le couple « transport – usage des sols » au cœur des dynamiques urbaines". Paris, ENMP, 2007. http://pastel.paristech.org/3538/01/BLEFEVRE_THESEFINALE_DEF.pdf.
Pełny tekst źródłaThe objective of this PhD dissertation is to explore if, in view of rapid demographic growth and limited financial capacities, the technologies accessible to poor cities can decrease trajectories of energy consumption and CO2 emissions due to urban transportation. Chapter 1 reviews what we already know of the determinants involved, and their recent evolutions. Chapter 2 analyzes conceivable transport and land-use solutions that would allow southern cities to attain sustainable development trajectories. The conclusions drawn from the first two chapters led us to analyze the interactions between the transport system and land-use system on a particular city, Bogota (Colombia). Chapter 3 studies the functional relations in the “Transport – Land Use” couple and its impact on urban space structuring processes in the long term, from the foundation of Bogota to the end of the 20th century. Chapter 4 focus on the impact of a new transportation infrastructure – the TransMilenio Bus Rapid Transit (BRT) – on real-estate and housing markets, on urban structure and the Origin-Destination trip matrix. Chapter 5 reviews the existing prospective tools able to simulate various combinations of realistic policies, and to measure their consequences on the levels of energy consumption and CO2 emissions related to urban transportation. The integrated urban “Transport – Land Use” model, TRANUS, is chosen and completed with a module of of energy consumption and CO2 emissions quantification, called “Energy Signature of Urban Transportation” (SETU). Chapter 6 tests the capacity of these combinations of policies to affect the trajectories of the energy consumption of urban transportation through the application of TRANUS-SETU on a case study, Bangalore (India)
Siqueira, Maicon Zaniboni. "Anisotropic shear viscosity and critical behavior of non-hydrodynamic quasinormal modes in strongly coupled plasmas". Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/43/43134/tde-16082017-161531/.
Pełny tekst źródłaNessa tese usamos a dualidade holográfica calibre/gravidade para estudar dois aspectos diferentes de plasmas não-Abelianos fortemente acoplados. No primeiro tópico estudamos os efeitos de campos magnéticos (Abelianos) intensos sobre o coeficientes de transporte de um plasma não-Abeliano fortemente acoplado. Devido à anisotropia espacial criada pelo campo magnético, o tensor de viscosidade mais geral de um plasma magnetizado deve possuir 5 coeficientes de viscosidade de cisalhamento e 2 de viscosidade volumétrica. Usamos a correspondência holográfica para um plasma N=4 Supersimétrico de Yang-Mills (SYM) fortemente acoplado para calcular a viscosidade de cisalhamento perpendicular ao campo magnético e a viscosidade de cisalhamento paralela ao campo. Na presença do campo magnético, a viscosidade de cisalhamento perpendicular ao campo satura o limite viscoso de Kovtun-Son-Starinets enquanto que na direção paralela ao campo o limite é violado. O segundo tópico investigado nessa tese é motivado pelo estudo do comportamento próximo ao equilíbrio de plasmas não-Abelianos fortemente interagentes que exibem um ponto crítico em seus diagramas de fase. Focamos no espectro dos modos quasinormais não-hidrodinâmicos de um plasma N=4 SYM fortemente acoplado na presença de um potencial químico, que exibe um ponto crítico no equilíbrio. Exceto próximo ao ponto crítico, observamos que ao aumentar o potencial químico geralmente se intensifica a taxa de amortecimento dos modos quasinormais, que levam à redução dos tempos de equilibração característicos do plasma dual fortemente acoplado. Entretanto, aproximando-se do ponto crítico o tempo de equilibração típico aumenta embora sua derivada em relação ao potencial químico diverge com um expoente igual à -1/2. Encontramos também um modo não-hidrodinâmico puramente imaginário no canal de difusão vetorial com potencial químico não-nulo que dita o tempo de equilibração neste canal próximo do ponto crítico.
He, Hongtao. "Vertical transport properties of weakly-coupled Ac-driven GaAs/AlAs superlattices /". View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?PHYS%202006%20HE.
Pełny tekst źródłaBreider, Thomas James. "Coupled halogen-sulfur-aerosol modelling in a 3D chemical transport model". Thesis, University of Leeds, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.535692.
Pełny tekst źródłaIppisch, Olaf [Verfasser]. "Coupled Transport in Natural Porous Media (2. rev. Ed.) / Olaf Ippisch". Heidelberg : Universitätsbibliothek Heidelberg, 2003. http://d-nb.info/1185583955/34.
Pełny tekst źródłaMouchliadis, Leonidas. "Transport and coherence properties of indirect excitions in coupled quantum wells". Thesis, Cardiff University, 2008. http://orca.cf.ac.uk/54724/.
Pełny tekst źródłaCherubini, Yvonne. "Influence of faults on the 3D coupled fluid and heat transport". Phd thesis, Universität Potsdam, 2013. http://opus.kobv.de/ubp/volltexte/2014/6975/.
Pełny tekst źródłaFaults can act as conduits, barriers or mixed conduit/barrier systems to fluid flow. Therefore, faults may significantly influence fluid flow regimes operating in the subsurface, possibly resulting in distinct variations of the deep thermal field. Both, flow dynamics and temperature changes are in turn crucial factors that need to be taken into account for geothermal energy exploration. This study investigated the influence of faults on the subsurface fluid system and thermal field and explored the processes controlling fluid behavior and thermal distribution both within host rocks and faults. For this purpose, 3D finite element simulations of coupled fluid and heat transport have been carried out, both for synthetic and real-case model scenarios on different scales. A small-scale synthetic model was developed to systematically assess the impact of an inclined fault by changing gradually its hydraulic width and its permeability within the simulations. An observed linear inverse relationship revealed that changing the fault width by one order of magnitude results in a fluid velocity decrease (~1e-01 m/s) within the fault. A high permeability contrast between fault and matrix favors fluid advection into the fault and leads to pronounced pressure and temperature changes in and around the same domain. When the permeability contrast between fault domain and host rock is low, however, no fluid flow is observed in the fault, thus resulting in undisturbed hydrostatic pressure and temperature fields. On the basis of these synthetic fault modelling results, the influence of faults on a larger scale have been analyzed within a more complex (real-case) geological setting,- a 3D model of the geothermal site Groß Schönebeck
located ~40 km north of Berlin. The integration of one permeable and three impermeable major faults, resulted in distinct changes observed in the local fluid circulation, thermal and pressure field. Modelled convective circulation within the permeable fault decisively modifies the thermal field (up to 15 K). Within the low permeable faults, heat is transferred only by conduction, inducing no thermal imprint but local deviations of the hydrostatic pressure field. To investigate the impact of major fault zones on the basin-scale geothermal field, coupled fluid and heat transport simulations have been conducted for a 3D structural model for Brandenburg region (Noack et al. 2010; 2013). Different geological scenarios in terms of modelled fault permeability have been carried out of which two end member models are analyzed. The results showed that tight fault zones affect the flow field locally. Acting as hydraulic barriers, fluid flow is deviated with very low velocities along them within a range of ~ 1 km on either sides. The modelled local changes in the groundwater circulation system have no considerable effect on the temperature field. By contrast, permeable fault zones induce a pronounced signature on the thermal field extending over a distance of ~ 2.4-8.8 km at -1000 m depth and ~6-12 km at -3000 m depth. This thermal signature, characterized by alternating cooler and hotter temperature domains, is controlled by up- and downward directed flow within the fault domain, principally driven by existing hydraulic head gradients. All studies demonstrated that faults have a considerable impact on the fluid and heat flow. The permeability in faults and surrounding geological layers as well as the specific geological setting turned out to be crucial factors in controlling the different kinds of heat transfer mechanisms that may evolve in faults. Temperature variations caused by permeable faults may be local but significant as well as changes in fluid dynamics by both conduits and barriers. Thus, the results demonstrated the importance to consider faults in geothermal energy exploration. In the final analysis, the simulations for the small-, regional- and basin-scale models showed that the outcomes cannot be transferred by upscaling and that it is necessary to consider each geological setting separately with respect to its configuration and scale dimension. In summary, this study demonstrated that the consideration of faults in 3D finite element models for coupled fluid and heat transport simulations on different scales is feasible. As these type of numerical simulations integrate both, the structural setting of the subsurface and the physical processes controlling subsurface transport, the outcomes of this thesis may provide positive contributions in that they valuably complement field- and laboratory-based investigations.
Dmytruk, Olesia. "Quantum transport in a correlated nanostructure coupled to a microwave cavity". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS335/document.
Pełny tekst źródłaIn this thesis, we study theoretically various physical properties of nanostructures that are coupledto microwave cavities. Cavity quantum electrodynamics (QED) with a quantum dot has been proven to be a powerful experimental technique that allows to study the latter by photonic measurements in addition to electronic transport measurements. In this thesis, we propose to use the cavity microwave field to extract additional information on the properties of quantum conductors: optical transmission coefficient gives direct access to electronic susceptibilities of these quantum conductors. We apply this general framework to different mesoscopic systems coupled to a superconducting microwave cavity, such as a tunnel junction, a quantum dot coupled to the leads, a topological wire and a superconducting ring. Cavity QED can be used to probe the finite frequency admittance of the quantum dot coupled to the microwave cavity via photonic measurements. Concerning the topological wire, we found that the cavity allows for determining the topological phase transition, the emergence of Majorana fermions, and also the parity of the ground state. For the superconducting ring, we propose to study the Josephson effect and the transition from the latter to the fractional Josephson effect, which is associated with the emergence of the Majorana fermions in the system, via the optical response of the cavity. The proposed framework allows to probe a broad range of nanostructures, including quantum dots and topological superconductors, in a non-invasive manner. Furthermore, it gives new information on the properties of these quantum conductors, which was not available in transport experiments
Sharma, Preeti. "Coupled electrokinetic fluxes in a single nanochannel for energy conversion". Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAY100/document.
Pełny tekst źródłaCoupled electrokinetic phenomena within nanochannel are of interest for energy harvestingand production of electricity based on the controlled mixing of river water with sea water known as "blue energy". The origin of the phenomena is related to interaction with charged walls and transport of ions within the so called Debye layer. This work aims at a better understanding of the physics and transport phenomena in this layer associated with solution confined in nanochannel.A specific instrumentation has been developed during this thesis to study the mechanisms governing coupled nanofluics fluxes. The idea is to characterize simultaneously the mass transport within the nanochannel and the electrical current driven through the nanochannel by the application of either salinity difference , pressure difference or voltage difference across the channel. The thesis is divided into three parts.In the first part, a custom made flow cell and experimental conditions to control and measure various fluxes is presented. The capability of cell to measure current or voltage under applied pressure or salinity gradient is presented taking the benefit of commercial nanoporous Nafion membrane.The second part is focused on an easy way of preparation of nanochannel sample in the form of single chip, in which nanochannel is interfaced to micro and macroscopic world. A well-controlled, 1.4µm long nanochannel of conical geometry with a maximum aspect ratio of 10 is fabricated. The minimum apex size of nanochannel achieved here is 50 nm which is about 30 times less than the length of channel. The presence of electrode directly at the interface of nano to micro cavity allow to perform electrical characterization of nanochannel with high precision.The third part of the thesis is devoted to the development of a method for the direct measurement of flow rate as low as 10 pL/min across a single nanochannel. This measurement approach combined with electrical measurement, could be used, in presence of pressure, voltage or salinity gradient, to measure the flow rate and the electrical current across a single nanochannel simultaneously and independently
Gatfield, Kelly. "Functional characterisation of mammalian Hâº-coupled amino acid transporters". Thesis, University of Newcastle Upon Tyne, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.438398.
Pełny tekst źródłaKruse, Carola. "Regularity and approximation of a hyperbolic-elliptic coupled problem". Thesis, Brunel University, 2010. http://bura.brunel.ac.uk/handle/2438/5253.
Pełny tekst źródłaOffidani, Manuel. "Coupled charge-spin transport and spin-orbit phenomena in 2D Dirac materials". Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/22769/.
Pełny tekst źródłaBeggs, Bruce Cameron. "Optical charge injection into a gallium arsenide acoustic charge transport device". Thesis, University of British Columbia, 1987. http://hdl.handle.net/2429/26681.
Pełny tekst źródłaApplied Science, Faculty of
Electrical and Computer Engineering, Department of
Graduate
Jevons, Mark Paul. "Expression and function of proton-coupled transporters in the mammalian intestine". Thesis, University of Newcastle Upon Tyne, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.531738.
Pełny tekst źródłaAnderson, Catriona M. H. "Intestinal proton-coupled amino acid and dipeptide transporters : function and regulation". Thesis, University of Newcastle Upon Tyne, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.398999.
Pełny tekst źródłaDanzer, Jörg. "Surfactant transport and coupled transport of polycyclic aromatic hydrocarbons (PAHs) and surfactants in natural aquifer material - laboratory experiments". Tübingen : Universität Tübingen, 2005. http://www.bsz-bw.de/cgi-bin/xvms.cgi?SWB12103792.
Pełny tekst źródłaShaffer, Nathaniel R. "Theory of collisional transport in ultracold neutral plasmas". Diss., University of Iowa, 2018. https://ir.uiowa.edu/etd/6638.
Pełny tekst źródłaPark, HyeongKae. "Coupled Space-Angle Adaptivity and Goal-Oriented Error Control for Radiation Transport Calculations". Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/13944.
Pełny tekst źródłaGraf, Thomas. "Modeling coupled thermohaline flow and reactive solute transport in discretely-fractured porous media". Thesis, Québec : Université Laval, 2005. http://www.theses.ulaval.ca/2005/23197/23197.pdf.
Pełny tekst źródłaChen, Rong. "Coupled electrochemical and heat/mass transport characteristics in passive direct methanol fuel cells /". View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?MECH%202007%20CHEN.
Pełny tekst źródłaHärtle, Rainer [Verfasser], i Michael [Akademischer Betreuer] Thoss. "Vibrationally Coupled Electron Transport through Single-Molecule Junctions / Rainer Härtle. Betreuer: Michael Thoss". Erlangen : Universitätsbibliothek der Universität Erlangen-Nürnberg, 2012. http://d-nb.info/1023597462/34.
Pełny tekst źródłaStewart, Andrew Kenneth. "Intracellular pH regulation associated with proton-coupled dipeptide transport in mouse small intestine". Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298321.
Pełny tekst źródłaLink, Percy Anne. "Improving parameterization of scalar transport through vegetation in a coupled ecosystem-atmosphere model". Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/43884.
Pełny tekst źródłaIncludes bibliographical references (p. 90-93).
Several regional-scale ecosystem models currently parameterize subcanopy scalar transport using a rough-wall boundary eddy diffusivity formulation. This formulation predicts unreasonably high soil evaporation beneath tall, dense forests and low soil evaporation beneath short, sparse grass. This study investigates alternative formulations by reviewing literature on flow and scalar transport in canopies, taking field measurements of subcanopy latent heat flux, and testing alternative model formulations in constrained numerical experiments. A field campaign was conducted in a dense rainforest in Luquillo National Forest, Puerto Rico, to measure wind and fluxes with eddy covariance devices. Wind velocities and fluxes of latent heat, sensible heat, and momentum were found to be much smaller below the canopy than above it. Modeling experiments tested a mixing-layer-based formulation of eddy diffusivity and a soil evaporation cutoff based on vortex penetration depth. The vortex penetration cutoff was found to be the most physically accurate and computationally simple option, and this study recommends that ecosystem and land-surface models adopt this formulation for subcanopy scalar transport.
by Percy Anne Link.
M.Eng.