Thèses sur le sujet « Interface method »
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Yang, Xingzhou. « Immersed Interface Method for Elasticity Problems with Interfaces ». NCSU, 2004. http://www.lib.ncsu.edu/theses/available/etd-07062004-175450/.
Texte intégralAmoah-Kusi, Christian. « Constant Interface Temperature Reliability Assessment Method : An Alternative Method for Testing Thermal Interface Material in Products ». PDXScholar, 2015. https://pdxscholar.library.pdx.edu/open_access_etds/2295.
Texte intégralSEIXAS, MARIA LUCIA ARRAES. « A MAP-BASED INTERFACE EVALUATION METHOD ». PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2004. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=5793@1.
Texte intégralA integração de informação geográfica e mapas digitais nos Sistemas de Informação Geográfica (SIGs) produz soluções para vários grupos de usuários. Vem crescendo o número de usuários não especializados que utilizam SIGs na Web ou em desktop para localizar endereços, planejar rotas, planejar viagens, encontrar lugares, e assim por diante. Estas aplicações menos complexas e destinadas a qualquer pessoa carecem fundamentalmente de avaliação, pois da qualidade da interação depende seu sucesso comercial. Apesar desta necessidade, praticamente não encontramos pesquisas sobre como avaliar estas aplicações mais simples de SIGs. Neste trabalho propomos um método de Inspeção Semiótica para Interfaces baseadas em Mapas (o ISIM) capaz de analisar o efeito de representações usadas nestas interfaces na comunicação da informação geográfica. O ISIM combina técnicas analíticas e empíricas. As técnicas analíticas são usadas para definir contextos de uso e perfis de usuários, bem como para interpretar observações empíricas. Técnicas empíricas são usadas em testes e entrevistas com usuários, para comparar parte dos dados obtidos com as técnicas analíticas. O ISIM, que inicialmente abrange dos SIGs apenas as interações baseadas em mapas, identifica uma classe de problemas básicos deste tipo de interação e, como é o caso de vários outros métodos semióticos, dá indicações sobre possibilidades de solução para eles.
The integration of digital maps and geographical information into Geographical Information Systems (GIS) produces solutions for several groups of users. There is an increasing number of non experts that use GIS on the Web or in desktop applications to locate addresses, plan routes and trips, find places, and so on. Less complex applications designed for general use critically need evaluation, because their commercial success depends heavily on the quality of human-computer interaction. In spite of such critical need, it is very hard to find research about how to evaluate these kinds of simpler applications. We propose a semiotic inspection method (whose acronym in Portuguese is ISIM) that analyzes the effect of representations in map-based interfaces to communicate geographic information. ISIM combines analytic and empirical techniques to carry out evaluations. Analytic techniques are used to define contexts of use and users' profiles, as well as to interpret empirical observations. ISIM also uses an empirical technique of tests and interviews with users. ISIM, whose scope encompasses only GIS map-based interaction, can identify a class of basic problems of interaction and, as is the case with many semiotic methods, hint at design solutions for them.
Li, Zhilin. « The immersed interface method : a numerical approach for partial differential equations with interfaces / ». Thesis, Connect to this title online ; UW restricted, 1994. http://hdl.handle.net/1773/6761.
Texte intégralWiegmann, Andreas. « The explicit jump immersed interface method and interface problems for differential equations / ». Thesis, Connect to this title online ; UW restricted, 1998. http://hdl.handle.net/1773/5774.
Texte intégralYang, Chao-Yang Yang. « Formative evaluation method for website interface development ». Thesis, Coventry University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.436297.
Texte intégralHe, Xiaoming. « Bilinear Immersed Finite Elements For Interface Problems ». Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27819.
Texte intégralPh. D.
Cinkilic, Emre. « Comparison of Interface State Spectroscopy Techniques by Characterizing Dielectric – InGaAs Interfaces ». The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1366329582.
Texte intégralMarshall, L. S. « A formal description method for user interfaces ». Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.377673.
Texte intégralLoubenets, Alexei. « A new finite element method for elliptic interface problems ». Licentiate thesis, KTH, Numerical Analysis and Computer Science, NADA, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3908.
Texte intégralA finite element based numerical method for the two-dimensional elliptic interface problems is presented. Due to presence of these interfaces the problem will contain discontinuities in the coefficients and singularities in the right hand side that are represented by delta functionals along the interface. As a result, the solution to the interface problem and its derivatives may have jump discontinuities. The introduced method is specifically designed to handle this features of the solution using non-body fitted grids, i.e. the grids are not aligned with the interfaces.
The main idea is to modify the standard basis function in the vicinity of the interface such that the jump conditions are well approximated. The resulting finite element space is, in general, non-conforming. The interface itself is represented by a set of Lagrangian markers together with a parametric description connecting them. To illustrate the abilities of the method, numerical tests are presented. For all the considered test problems, the introduced method has been shown to have super-linear or second order of convergence. Our approach is also compared with the standard finite element method.
Finally, the method is applied to the interface Stokes problem, where the interface represents an elastic stretched band immersed in fluid. Since we assume the fluid to be homogeneous, the Stokes equations are reduced to a sequence of three Poisson problems that are solved with our method. The numerical results agree well with those found in the literature.
Rabadi, Kairas. « PERFORMANCE OF INTERFACE ELEMENTS IN THE FINITE ELEMENT METHOD ». Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2188.
Texte intégralM.S.M.E.
Department of Mechanical, Materials and Aerospace Engineering;
Engineering and Computer Science
Mechanical Engineering
Geng, Weihua. « Interface method and Green's function based Poisson Boltzmann equation solver and interface technique based molecular dynamics ». Diss., Connect to online resource - MSU authorized users, 2008.
Trouver le texte intégralSarles, Stephen Andrew. « Physical Encapsulation of Interface Bilayers ». Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/26950.
Texte intégralPh. D.
Gozluklu, Burak. « Delamination Analysis By Using Cohesive Interface Elements In Laminated Composites ». Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12611005/index.pdf.
Texte intégralBlades, Eric Lindsay. « A sliding interface method for unsteady unstructured parallel flow simulations ». Diss., Mississippi State : Mississippi State University, 2004. http://library.msstate.edu/etd/show.asp?etd=etd-10142004-165050.
Texte intégralKhuu, Vinh P. « Evaluation of thermal interface materials and the laser flash method ». College Park, Md. : University of Maryland, 2009. http://hdl.handle.net/1903/9873.
Texte intégralThesis research directed by: Dept. of Mechanical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Persson, Markus, et Alexander Semb. « Designing Success : Industrial Process Interface Development ». Thesis, Blekinge Tekniska Högskola, Avdelningen för programvarusystem, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-3115.
Texte intégralMagisteruppsatsen beskriver och behandlar konflikten mellan användbarhet och användarsäkerhet vid design av industriella gränssnitt. Med litteratur och fallstudier som grund analyseras värdefulla karakteristika som är betydelsefulla i en designprocess för att öka möjligheten att lösa denna konflikt. Vidare undersöker uppsatsen olika typer av etablerade designmetoder varav de mest värdefulla delarna är extraherade och sammanfogade till en ny metod. Denna metod argumenteras i uppsatsen för att besitta förmågan att överbrygga klyftan mellan användbarhet och användarsäkerhet. Metoden TSAR, (Task and Safety Analysis Rationale), baseras på delar av existerande och etablerade metoder som har bevisats applicerbara genom utbredd användning.
Ben, Romdhane Mohamed. « Higher-Degree Immersed Finite Elements for Second-Order Elliptic Interface Problems ». Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/39258.
Texte intégralPh. D.
Ronkainen, S. (Sami). « Designing for ultra-mobile interaction:experiences and a method ». Doctoral thesis, University of Oulu, 2010. http://urn.fi/urn:isbn:9789514261794.
Texte intégralCalle, Ochoa Andres Eduardo. « InterSis : uma interface grafica para modelamento sismico ». [s.n.], 2003. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287053.
Texte intégralDissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica
Made available in DSpace on 2018-08-03T20:40:40Z (GMT). No. of bitstreams: 1 CalleOchoa_AndresEduardo_M.pdf: 5418722 bytes, checksum: d570c726fc5841a6556ad52fca983209 (MD5) Previous issue date: 2003
Resumo: o modelamento desempenha importante papel nos estudos de processamento e inversão de dados sísmicos. Muitos problemas complicados podem ser melhor atacados e entendidos quando os fenômenos de propagação de ondas envolvidos podem ser modelados, pelo menos em modelos geológicos mais simples. Tendo em vista ser o modelamento sísmico uma área de vasta aplicação e interesse, um grande número de pacotes computacionais existem capazes de oferecer sofisti-cadas capacitações para propósitos de modelagem. Esses pacotes são sujeitos entretanto, a severas limitações em sua utilização, não só devido aos seus altos custos, quanto também à inacessibi-lidade de seus códigos fonte. Por outro lado, as alternativas que existem, na forma de pacotes de uso livre, não representam substituição satisfatória. Isto porque os pacotes de modelamento disponíveis, geralmente desenvolvidos em ambientes científico-acadêmicos, não são suficiente-mente amigáveis e flexíveis, por exemplo na especificação de parâmetros de entrada, disposição gráfica de resultados, etc. o objetivo desta dissertação é investigar os principais problemas associados à construção de uma interface gráfica capaz de suportar uma variedade de programas de modelamento existentes e disponíveis como programas livres. Como resultado dessas investigações, é apresentada neste tra-balho a interface gráfica chamada InterSis. A interface InterSis foi construída de modo a aceitar, de forma simples e unificada, programas de modelamento destinados à propagação de ondas em meios 2D e 2.5D.InterSis foi desenvolvida utilizando os pacotes de domínio público GTK + (Graphical Tool/dt) e SU (Seismic Una). No seu presente estágio, InterSis é capaz de atuar como efetiva plataforma para os programas: (a) Seis88, um programa bem estabelecido de traçado de raios em mode-los elásticos e isotrópicos, desenvolvido por V. Cerveny e I. Psencík e (b) fd2d um programa de diferenças finitas para a equação de onda acústica, desenvolvido por 1. Costa. Como uma pro-priedade de particular interesse, InterSis utiliza a informação fomecida pelo programa Seis88 para computar os parâmetros do chamado método CRS (do Inglês Common-Reflection-Suiface). Desta forma, a interface proposta pode ser de valia nos estudos de imageamento e inversão que utilizam o método CRS. Vale notar que, devido à sua estrutura de caráter geral, InterSis pode ser bem adaptada a outros programas de modelamento
Abstract: Modelling plays an important role in seismie data processing and inversion. Several compli-cated problems can be better addressed and understood, when the wave propagation involved ean be modelled, at least in simple versions ofthe geological model. As a wide topie of application and interest, a number of commercial softwares exist that offer sophisticated capabilities for modelling purposes. These packages are subjected to a number of limitations on their use, not only of costs, but also because their source codes are not accessible. On the other hand, the few ahematives existo in the form of open packages do not represent an easy replacement. The available modelling codes, mainly developed within academie-scientific environments, are not friendly and flexible enough, e.g., in the specification of input parameters and display of resu1ts. The aim of this work is to investigate the main problems connected with the construction of a graphica1 interface that would be an useful support to a number of modelling programs available as open codes. As a result of the investigations, a graphical interface, ca1led InterSis, has been developed. InterSis ean accept and handle, in a simple and unified way,softwares that involves seismic modelling in 2D and 2.5D media. InterSis was developed using the public-domain softwares GTK + (Graphica/ Too/kit) and SU (Seismic Unix). In its present stage, it is able to be an effective platform for the following programs : (a) Seis88, a well-established ray-tracing program developed by v. Cerveny and I. PsenãK and (b) fd2d a finite-difference program for the acoustie wave equation developed by J. Costa. As a particular feature, InterSis uses the information provided by Seis88 to compute the parameters ofthe COmnJOlI-Rejlectioll-Surface (CRS) method. In this way, the proposed intedàce ean be useful to imaging and inversion studies based on the CRS method. It is to be noted that, due to its general s1ructure, InterSis can be well adapted to other modelling programs
Mestrado
Reservatórios e Gestão
Mestre em Ciências e Engenharia de Petróleo
Samvin, David. « Finite Element Methods for Interface Problems ». Licentiate thesis, Jönköping University, JTH, Industriell produktutveckling, produktion och design, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-54570.
Texte intégralDenna avhandling fokuserar på effektiva beräkningsmetoder för flöde i porösa media med sprickor. Två tillvägagångssätt presenteras där sprickan tillåts skära det underliggande finita elementnätet. Sprickans inverkan på flödet tas om hand med hjälp av den underliggande diskretiseringen som tillåter diskontinuiteter. Med andra ord kan flöden modelleras med olika egenskaper; på var sida av sprickan, samt längs sprickan. Metoden tar även hand om instabilitet som uppstår dels på grund av godtyckliga skärningar av bakgrundselementen och dels på grund av olika materialegenskaper. Syftet med denna avhandling är att presentera grunderna för dessa metoder och ge grundläggande matematiska förklaringar.
Brewster, Stephen. « Providing a structured method for integrating non-speech audio into human-computer interfaces ». Thesis, University of York, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241055.
Texte intégralZaichenkov, Pavel. « A method for consistent non-local configuration of component interfaces ». Thesis, University of Hertfordshire, 2017. http://hdl.handle.net/2299/19053.
Texte intégralMarella, Saikrishna V. Udaykumar H. S. « A Parallelized sharp-interface fixed grid method for moving boundary problems ». Thesis supplements, 2006. http://ir.uiowa.edu/etd/88.
Texte intégralWu, Xuqing. « DSS user interface design method with application to shop floor scheduling ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/mq47118.pdf.
Texte intégralBrehm, Christoph. « Novel Immersed Interface Method for Solving the Incompressible Navier-Stokes Equations ». Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/202770.
Texte intégralMarella, Saikrishna V. « A Parallelized sharp-interface fixed grid method for moving boundary problems ». Diss., University of Iowa, 2006. https://ir.uiowa.edu/etd/88.
Texte intégralEriksson, Isak, et Andreas Johansson. « Developing a method for an ERP system user interface beta test program ». Thesis, Linköping University, Department of Computer and Information Science, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-15760.
Texte intégral
With this thesis we have been interested in how to utilise an user interface beta test period. Which activities are appropriate to be performed, with focus on how activities contribute to user interface validation, further user interface improvements, and improvements of the user interface roll‐out. Additionally we have tried to couple this to end‐user satisfaction and acceptance of this new user interface, since the usage of the system is mandatory for the end users.
We have approached this by developing a method that is based on four different perspectives. Three perspectives are studied theoretically, and one perspective is based on empiric research. These perspectives are separate from each other; to combine them we have used a common denominator of increased system usage. This denominator is derived from a viewpoint upon end‐users and how user satisfaction, user acceptance, and behaviour incentives for usage affect the perspectives and consequently our result.
This broad research has resulted in a self‐sustaining method that we describe both in an overview and in greater detail explain the beta period and the associated roles, the different activities and how they should be executed in relevance to time. For every activity a table of considerations, i.e. when, who, how, and why are presented together with an explanation how the activity can influence end‐users to use the system.
We conclude that the result of this thesis will aid and guide vendor companies through the beta testing program of a new user interface. The resulting method determines which activities that can be of interest to carry out and how these will contribute to future development and/or improve roll‐out. By utilising this method as a framework we see the possibility to incorporate it in an existing user-centre development process, but it can also be used as a simple, straightforward, and self‐sustaining method.
MacFadden, James. « Computational methods for incompressible fluid flows, with reference to interface modelling by an extended finite element method ». Thesis, Swansea University, 2006. https://cronfa.swan.ac.uk/Record/cronfa42810.
Texte intégralAngelides, Michael. « Stress compatible finite elements for bimaterial interface problems ». Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63808.
Texte intégralZhu, Hong Fang. « An immersed interface method algorithm with discontinuous coefficients for the energy equation ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0027/MQ27028.pdf.
Texte intégralSuada, Muhamad Giri. « A finite element method for delamination initiation and growth using interface elements ». Thesis, Imperial College London, 1997. http://hdl.handle.net/10044/1/11923.
Texte intégralMehrabian, Hadi. « Simulation of selected interfacial dynamic problems using Cahn-Hilliard diffuse-interface method ». Thesis, University of British Columbia, 2014. http://hdl.handle.net/2429/46267.
Texte intégralZhu, Hong Fang Carleton University Dissertation Engineering Mechanical and Aerospace. « An Immersed interface method algorithm with discontinuous coeffcients for the energy equation ». Ottawa, 1997.
Trouver le texte intégralAğıroğlu, İzzet Onur Tanoğlu Gamze. « An application of the finite differences method to a dynamical interface problem/ ». [s.l.] : [s.n.], 2004. http://library.iyte.edu.tr/tezler/master/matematik/T000445.pdf.
Texte intégralSellers, Eric William. « A P300-based brain-computer interface testing an alternative method of communication / ». [Tampa, Fla.] : University of South Florida, 2004. http://purl.fcla.edu/fcla/etd/SFE0000536.
Texte intégralSellers, Eric W. « A P300-Based Brain-Computer Interface : Testing an Alternative Method of Communication ». Scholar Commons, 2004. https://scholarcommons.usf.edu/etd/1242.
Texte intégralKlicker, Laura. « A Method for Standardization within the Payload Interface Definition of a Service-Oriented Spacecraft using a Modified Interface Control Document ». Thesis, KTH, Rymdteknik, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-217971.
Texte intégralFör en ökad tillgång till rymden finns det behov av standardisering för en förbättrad service. Utvecklingen av standardiserade rymdfarkostgränsytor för flera och olika nyttolaster har undersökts via ett dokumentet för gränssnittskontroll (ICD) inom projektet Peregrine Lunar Lander för Astrobotic Technologies, Inc. Proceduren är enkel, transparent och anpassningbar; dess användning för andra liknande projekt har värderats.
Sambasivan, Shiv Kumar. « A sharp interface Cartesian grid hydrocode ». Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/593.
Texte intégralKim, Bo Hung. « A graphical preprocessing interface for non-conforming spectral element solvers ». [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1819.
Texte intégralMorrison, Heather. « Online catalogue research and the verbal protocol method ». MCB University Press, 1999. http://hdl.handle.net/2429/957.
Texte intégralFigiel, Lukasz. « Sensitivity Analysis of Interface Fatigue Crack Propagation in Elastic Composite Laminates ». Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2004. http://nbn-resolving.de/urn:nbn:de:swb:14-1102358246078-89903.
Texte intégralMarth, Wieland. « Hydrodynamic Diffuse Interface Models for Cell Morphology and Motility ». Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-204651.
Texte intégralDiese Dissertation beschäftigt sich mit mathematischen Modellen zur Beschreibung von Gleichgewichts- und dynamischen Zuständen von verallgemeinerten biologischen Zellen. Die Zellen werden dabei als thermodynamisches System aufgefasst, bei dem Strömungseffekte innerhalb und außerhalb der Zelle zusammen mit einem Helfrich-Modell für Zellmembranen kombiniert werden. Schließlich werden durch einen Energie-Variations-Ansatz die Evolutionsgleichungen für die Zelle hergeleitet. Es ergeben sie dabei Mehrphasen-Systeme, die Strömungseffekte mit einem freien Randwertproblem, das zusätzlich physikalischen Einflüssen wie Biegung und Oberflächenspannung unterliegt, vereinen. Um solche Probleme effizient zu lösen, wird in dieser Arbeit die Diffuse-Interface-Methode verwendet. Ein Vorteil dieser Methode ist, dass es sehr einfach möglich ist, Modelle, die verschiedenste Prozesse beschreiben, miteinander zu vereinen. Dies erlaubt es, komplexe biologische Phänomene, wie zum Beispiel Zellmotilität oder auch die kollektive Bewegung von Zellen, zu beschreiben. In den Modellen für Zellmotilität wird ein biologisches Netzwerk-Modell für GTPasen oder auch ein Active-Polar-Gel-Modell, das die Aktinfilamente im Inneren der Zellen als Flüssigkristall auffasst, mit dem Multi-Phasen-Modell kombiniert. Beide Modelle erlauben es, komplexe Vorgänge bei der selbst hervorgerufenen Bewegung von Zellen, wie das Vorantreiben der Zellmembran durch Aktinpolymerisierung oder auch die Kontraktionsbewegung des Zellkörpers durch kontraktile Spannungen innerhalb des Zytoskelets der Zelle, zu verstehen. Weiterhin ist die kollektive Bewegung von vielen Zellen von großem Interesse, da sich hier viele nichtlineare Phänomene zeigen. Um das Diffuse-Interface-Modell für eine Zelle auf die Beschreibung mehrerer Zellen zu übertragen, werden mehrere Phasenfelder eingeführt, die die Zellen jeweils kennzeichnen. Schließlich werden die Zellen durch ein lokales Abstoßungspotential gekoppelt. Das Modell wird angewendet, um White blood cell margination, das die Annäherung von Leukozyten an die Blutgefäßwand bezeichnet, zu verstehen. Dieser Prozess wird dabei bestimmt durch den komplexen Zusammenhang zwischen Kollisionen, den jeweiligen mechanischen Eigenschaften der Zellen, sowie deren Auftriebskraft innerhalb der Adern. Die Simulationen zeigen, dass diese Annäherung sich in bestimmten Gebieten des kardiovaskulären Systems stark vermindert, in denen die Blutströmung das Stokes-Regime verlässt. Schließlich wird das Active-Polar-Gel-Modell mit dem Modell für die kollektive Bewegung vom Zellen kombiniert. Dies macht es möglich, die kollektive Bewegung der Zellen und den Einfluss von Hydrodynamik auf diese Bewegung zu untersuchen. Es zeigt sich dabei, dass der Zustand der kollektiven gerichteten Bewegung sich spontan aus der Neuausrichtung der jeweiligen Zellen durch inelastische Kollisionen ergibt. Obwohl die Hydrodynamik einen großen Einfluss auf solche Systeme hat, deuten die Simulationen nicht daraufhin, dass Hydrodynamik die kollektive Bewegung vollständig unterdrückt. Weiterhin wird in dieser Arbeit gezeigt, wie die stark gekoppelten Systeme numerisch gelöst werden können mit Hilfe der Finiten-Elemente-Methode und wie die Effizienz der Methode gesteigert werden kann durch die Anwendung von Operator-Splitting-Techniken und Problemparallelisierung mittels OPENMP
Berthelsen, Petter Andreas. « An immersed interface method for two-dimensional modelling of stratified flow in pipes ». Doctoral thesis, Norwegian University of Science and Technology, Department of Energy and Process Engineering, 2004. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-306.
Texte intégralThis thesis deals with the construction of a numerical method for solving two-dimensional elliptic interface problems, such as fully developed stratified flow in pipes. Interface problems are characterized by its non-smooth and often discontinuous behaviour along a sharp boundary separating the fluids or other materials. Classical numerical schemes are not suitable for these problems due to the irregular geometry of the interface. Standard finite difference discretization across the interface violates the interfacial boundary conditions; therefore special care must be taken at irregular grid nodes.
In this thesis a decomposed immersed interface method is presented. The immersed interface method is a numerical technique formulated to solve partial differential equations in the presence of an interface where the solution and its derivatives may be discontinuous and non-smooth. Componentwise corrections terms are added to the finite difference stencil in order to make the discretization well-defined across the interface. A method that approximates the correction terms is also proposed. Results from numerical experiments show that the rate of convergence is approximately of second order.
Moreover, the immersed interface method is applied to stratified multiphase flow in pipes. The flow is assumed to be fully developed and in steady-state. For turbulent flow, both a low Reynolds number turbulence model and a two-layer turbulence model are adopted in order to imitate turbulence in the flow field and in the vicinity of the boundaries. The latter turbulence model is modified accordingly to account for the effects of a wavy interface. In this case, the concept of interfacial roughness is used to model the wavy nature of the interface.
Numerical results are compared with analytical solutions for laminar flow and experimental data for turbulent flow. It is also demonstrated that the current numerical method offers more flexibility in simulating stratified pipe flow problems with complex shaped interfaces, including three-phase flow, than seen in any previous approach.
Paper I reprinted with kind permission of Elsevier, Sciencedirect
Kulkarni, Vikram Digambar. « A piecewise linear interface tracking method for 3-D Eulerian incompressible fluid flows ». Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ36910.pdf.
Texte intégralGustafson-Pearce, Olinkha. « The application of the information architecture method to design an intuitive haptic interface ». Thesis, Brunel University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429234.
Texte intégralHinneh, Perry. « The Finite Block Method : a meshless study of interface cracks in bi-materials ». Thesis, Queen Mary, University of London, 2018. http://qmro.qmul.ac.uk/xmlui/handle/123456789/39754.
Texte intégralDoong, Jia-maw. « A dynamic, time-stepping boundary element method for frictional crack and interface problems / ». The Ohio State University, 1988. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487588939087424.
Texte intégralLiu, Yang. « The Immersed Interface Method for Flow Around Non-Smooth Boundaries and Its Parallelization ». Thesis, Southern Methodist University, 2017. http://pqdtopen.proquest.com/#viewpdf?dispub=10283304.
Texte intégralIn the immersed interface method (IIM), the boundaries of objects in a fluid are treated as immersed interfaces in the fluid. Singular forces are used to represent the effects of the objects on the fluid, and jump conditions induced by the singular forces are incorporated into numerical schemes to simulate the flow. Previously, the immersed interface method for simulating smooth rigid objects with prescribed motion in 2D & 3D incompressible viscous flows has been developed by Xu. In this thesis, we extend the method for rigid objects with non-smooth boundaries by computing necessary jump conditions using line segment representation of 2D objects. We also present the parallelization strategy for the development of a high-performance program for distributed-memory parallel computing with Message Passing Interface (MPI ). Different tests are performed, and numerical results and comparisons are given to study the accuracy, efficiency, and robustness of our method.
Mohammed, Imaduddin F. « An interface to grid file method for datacube storage and range sum query / ». Available to subscribers only, 2007. http://proquest.umi.com/pqdweb?did=1404354991&sid=9&Fmt=2&clientId=1509&RQT=309&VName=PQD.
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