Dissertations / Theses on the topic 'Statistical approach to fluid mechanics'
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Archer, Andrew John. "Statistical mechanics of soft core fluid mixtures." Thesis, University of Bristol, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288269.
Fontaine, Côme. "Etude de deux modèles simplifiés de turbulence à l'aide du groupe de renormalisation fonctionnel : l'équation de Burgers et le modèle de Sabra." Electronic Thesis or Diss., Université Grenoble Alpes, 2023. http://www.theses.fr/2023GRALY083.
In this thesis, we focus on two simplified models describing turbulent flows. In these two models, the turbulent state exhibits scale-invariance and universal statistical properties resembling those of true hydrodynamical turbulence. This type of behaviour is very familiar in physics: it corresponds to a critical system. In this work, we use a widely used tool in the study of criticality: the functional renormalisation group (FRG). The first model, named the Sabra shell model, describes effective interactions among a discrete number of velocity modes of a turbulent fluid. This schematic description captures many essential properties of turbulent flows. In particular, the velocity field is multifractal. The way in which the dynamics generates this multifractality is still poorly understood from a theoretical perspective. In this thesis, we formulate a reverse renormalisation flow, meaning that we integrate out the largest scales first. Using this method, we find a fixed point of the renormalisation flow with anomalous scale invariance, relatively close to the expected value for certain observables. We show that it is clearly distinct from the fixed point obtained when all scales are forced, through a forcing with a power-law spectrum, which corresponds to the fixed point of the RG obtained in perturbation theory. The second model studied is the Burgers equation, which describes the dynamics of a fluid in the absence of pressure. We focus on the effect of a conservative noise on the velocity field. We prove the existence of a scale invariant regime with a critical dynamical exponent z=1 using an exact closure of the renormalisation flow equation. This closure relies on the existence of certain symmetries of the Burgers equation. Indications of the existence of this new scaling regime were previously found in numerical solutions of the Burgers equation. We provide in this thesis a theoretical proof of its existence and calculate the associated universal properties
Rossi, Andrea. "Statistical Mechanics Approach to Protein Design." Doctoral thesis, SISSA, 2000. http://hdl.handle.net/20.500.11767/4329.
Davies, Lowri A. "Selected topics in the statistical mechanics of fluids." Thesis, University of Sheffield, 1997. http://etheses.whiterose.ac.uk/14744/.
Rasmussen, H. O. "The statistical theory of stationery turbulence." Thesis, University of Cambridge, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363346.
Baskaran, Aparna. "Statistical mechanics and linear response for a granular fluid." [Gainesville, Fla.] : University of Florida, 2006. http://purl.fcla.edu/fcla/etd/UFE0013684.
Itami, Masato. "Non-equilibrium Statistical Theory for Singular Fluid Stresses." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215285.
Parker, Daniel N. "Thermodynamics, reversibility and Jaynes' approach to statistical mechanics." College Park, Md. : University of Maryland, 2006. http://hdl.handle.net/1903/3803.
Thesis research directed by: Philosophy. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.
Louveau, Joy E. (Joy Emmanuelle). "A statistical mechanics approach to vaccination against HIV." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/117898.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 75-81).
Most vaccines stimulate the production of antibodies that provide a potent defense upon reinfection by the same strain of pathogen. The key process in antibody development is a stochastic process known as affinity maturation (AM) which generates strain-specific antibodies upon immunization by one antigen. A highly mutable virus like HIV evades recognition by these strain-specific antibodies via the emergence of new mutant strains within the patient. In some chronically infected patients, antibodies that can bind diverse antigens and thus protect against many HIV strains arise naturally; they are named broadly-neutralizing antibodies (bnAbs). A vaccine that elicits bnAbs could prevent HIV infections. This vaccine is expected to contain several different antigens. However, because bnAbs rarely appear in HIV patients, the complex mechanisms by which they emerge are not well understood. Theoretical models of AM could help identify promising vaccination strategies and shed light on a previously ignored problem in basic immunology; meaning how AM works with several antigens. For my thesis I investigated two pathways for breadth evolution. First, motivated by experimental findings that bnAbs have many mutations that may modify the flexibility of the binding region, I examined how flexibility influences breadth. A flexible binding region is expected to enable different conformations and therefore to allow binding to diverse antigens. Towards that goal, I developed a theoretical model of AM which, combined with Molecular Dynamics simulations, suggests that eliciting flexibility-affecting mutations is not essential for the evolution of bnAbs if proper germline B cells are first activated. This is significant as it simplifies the task of immunogen design. For my second project, I studied how separating the different antigens in time and mutational distance affects breadth of binding and antibody titers. The main observation is that introducing the antigens at different times is key to generating breadth. Furthermore, sequentially introducing one antigen per injection yields the greatest breadth and antibody titers. We also devised a prediction tool for breadth given a set of antigens and an immunization protocol. My results suggest optimal vaccination strategies which are expected to guide future in vivo investigations by our collaborators.
by Joy E. Louveau.
Ph. D.
Seyedi, Seyedalireza <1980>. "Predictability in Social Science, The statistical mechanics approach." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7199/1/seyedi_seyedalireza_tesi.pdf.
Seyedi, Seyedalireza <1980>. "Predictability in Social Science, The statistical mechanics approach." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amsdottorato.unibo.it/7199/.
INGROSSO, ALESSANDRO. "Statistical Mechanics Approach to Inverse Problems on Networks." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2641787.
Smith, Douglas Morgan. "Fluid dynamic calculations using the multigrid approach." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46556.
Dasi, Lakshmi Prasad. "Statistical characteristics of turbulent chemical plumes." Thesis, Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/21256.
Nehring, Benjamin. "Point processes in statistical mechanics : a cluster expansion approach." Phd thesis, Universität Potsdam, 2012. http://opus.kobv.de/ubp/volltexte/2012/6268/.
Ein Punktprozess ist ein Mechanismus, der zufällig ein lokalendliches Punktmaß realisiert. Ein Hauptresultat dieser Arbeit ist ein Existenzsatz für eine sehr große Klasse von Punktprozessen mit einem signierten Levy Pseudomaß L. Diese Klasse ist eine Erweiterung der Klasse der unendlich teilbaren Punktprozesse. Die verwendete Methode der Konstruktion ist eine Verbindung der klassischen Punktprozesstheorie, wie sie von Kerstan, Matthes und Mecke ursprünglich entwickelt wurde, mit der sogenannten Methode der Cluster-Entwicklungen aus der statistischen Mechanik. Ausgangspunkt ist eine Familie von signierten Radonmaßen. Diese definiert einerseits das Levysche Pseudomaß L; andererseits wird mit deren Hilfe der Prozess lokal definiert. Der Zusammenhang zwischen L und dem Prozess ist so, dass der Prozess die durch L bestimmte Integralgleichung (genannt Clustergleichung) löst. Wir zeigen, dass sich die Resultate aus der klassischen Theorie der unendlich teilbaren Punktprozesse auf natürliche Weise auf die neue Klasse der Punktprozesse mit signiertem Levy Pseudomaß erweitern lassen. So erhalten wir z.B. ein Kriterium für die Einfachheit und eine Charackterisierung durch die Clustergleichung für jene Punktprozesse. Unser erstes Hauptresultat in Kapitel 3 zur Analyse der konstruierten Prozesse ist ein Darstellungssatz der faktoriellen Momentenmaße. Mit dessen Hilfe werden wir die permanentischen respektive determinantischen Punktprozesse, die in die Klasse der Bosonen respektive Fermionen Prozesse fallen, identifizieren. Als ein Nebenresultat erhalten wir eine Darstellung der (reduzierten) Palm Kerne von unendlich teilbaren Punktprozessen. Im Kapitel 4 konstruieren wir mit Hilfe unseres Existenzsatzes unendlich ausgedehnte Gibbsche Prozesse sowie Quanten-Bose und Polymer Prozesse. Unseres Wissens sind letztere bisher nicht konstruiert worden. Im letzten Teil der Arbeit zeigen wir, dass die Familie der Clustergleichungen gewisse Stabilitätseigenschaften gegenüber gewissen Transformationen ihrer Lösungen aufweist. Dies wird erstens verwendet, um zu verdeutlichen, wie groß die Klasse der Punktprozesslösungen einer solchen Gleichung ist. Zweitens wird damit der Ausschauerungssatz von Kerstan, Matthes und Mecke in unserer allgemeineren Situation gezeigt. Mit seiner Hilfe können wir die Klasse der Polyaschen Prozesse auf die der von uns genannten Polya Verzweigungsprozesse vergrößern. Der letzte Abschnitt der Arbeit beschäftigt sich mit dem Ausdünnen und dem Splitten von Punktprozessen. Wir beweisen, dass die Klassen der Bosonen und Fermionen Prozesse abgeschlossen unter Ausdünnung ist. Die Ergebnisse über das Ausdünnen verwenden wir, um eine Teilklasse der Punktprozesse mit signiertem Levy Pseudomaß als doppelt stochastische Poissonsche Prozesse zu identifizieren. Wir stellen uns auch die Frage: Angenommen wir beobachten eine Realisierung einer Ausdünnung eines Punktprozesses. Wie sieht die Verteilung der gelöschten Punktkonfiguration aus? Diese bedingte Verteilung nennen wir splitting Kern, und ein überraschendes Resultat ist, dass der Papangelou-Kern der Ausdünnung, abgesehen von einem konstanten Faktor, gegeben ist durch das Intensitätsmaß des splitting Kernes.
Volpati, Valerio. "Statistical Mechanics approach to the sustainability of economic ecosystems." Doctoral thesis, SISSA, 2016. http://hdl.handle.net/20.500.11767/4924.
Fridlyand, Alex A. "Statistical properties of ideal two dimensional fluid flows : a numerical study." Diss., Georgia Institute of Technology, 1995. http://hdl.handle.net/1853/12227.
Neergaard, John R. "Master equation approach to KPZ type growth /." Thesis, Connect to this title online; UW restricted, 1996. http://hdl.handle.net/1773/9786.
Wang, Pengyun. "A Statistical Approach for Assessing Seismic Transitions Associated with Fluid Injections." Research Showcase @ CMU, 2016. http://repository.cmu.edu/dissertations/730.
FEINAUER, CHRISTOPH. "The Statistical Mechanics Approach to Protein Sequence Data: Beyond Contact Prediction." Doctoral thesis, Politecnico di Torino, 2016. http://hdl.handle.net/11583/2640930.
Colizza, Vittoria. "Statistical mechanics approach to complex networks: from abstract to biological networks." Doctoral thesis, SISSA, 2004. http://hdl.handle.net/20.500.11767/4002.
Tammisola, Outi. "Linear stability of plane wakes and liquid jets: global and local approach." Licentiate thesis, Stockholm : Skolan för teknikvetenskap, Kungliga Tekniska högskoaln, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-10188.
Price, Laura E. "Imperfect mixing in energy and mass transport : a data-based mechanistic modelling approach." Thesis, Lancaster University, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301086.
Muzaferija, Samir. "Adaptive finite volume method for flow prediction using unstructured meshes and multigrid approach." Thesis, Online version, 1994. http://ethos.bl.uk/OrderDetails.do?did=1&uin=uk.bl.ethos.311804.
Husowitz, Barry Charles. "Effect of Confinement and Heterogeneity on Phase Behavior: A Density Functional Approach." Diss., The University of Arizona, 2007. http://hdl.handle.net/10150/196124.
Aldridge, John Nigel. "A continuum mixture theory approach to sediment transport with application to turbulent oscillatory boundary layers." Thesis, University of Plymouth, 1990. http://hdl.handle.net/10026.1/1897.
Srivastav, Abhishek Ray Asok. "Collaboration and pattern recognition in distributed sensor networks a statistical mechanics based approach /." [University Park, Pa.] : Pennsylvania State University, 2009. http://etda.libraries.psu.edu/theses/approved/WorldWideIndex/ETD-4402/index.html.
Zhang, Yongsheng [Verfasser]. "First-principles statistical mechanics approach to step decoration at solid surfaces / Yongsheng Zhang." Berlin : Freie Universität Berlin, 2008. http://d-nb.info/1023022702/34.
Rosay, Sophie. "A statistical mechanics approach to the modelling and analysis of place-cell activity." Thesis, Paris, Ecole normale supérieure, 2014. http://www.theses.fr/2014ENSU0010/document.
Place cells in the hippocampus are neurons with interesting properties such as the corre-lation between their activity and the animal’s position in space. It is believed that theseproperties can be for the most part understood by collective behaviours of models of inter-acting simplified neurons. Statistical mechanics provides tools permitting to study thesecollective behaviours, both analytically and numerically.Here, we address how these tools can be used to understand place-cell activity withinthe attractor neural network paradigm, a theory for memory. We first propose a modelfor place cells in which the formation of a localized bump of activity is accounted for byattractor dynamics. Several aspects of the collective properties of this model are studied.Thanks to the simplicity of the model, they can be understood in great detail. The phasediagram of the model is computed and discussed in relation with previous works on at-tractor neural networks. The dynamical evolution of the system displays particularly richpatterns. The second part of this thesis deals with decoding place-cell activity, and theimplications of the attractor hypothesis on this problem. We compare several decodingmethods and their results on the processing of experimental recordings of place cells in afreely behaving rat
Telotte, John Charles. "Thermodynamic properties of multicomponent mixtures from the solution of groups approach to direct correlation function solution theory." Gainesville, FL, 1985. http://www.archive.org/details/thermodynamicpro00telo.
Erlhoff, Ethan Bruce. "Distributed Forcing on a 3D Bluff Body with a Blunt Base, An Experimental Active Drag Control Approach." DigitalCommons@CalPoly, 2012. https://digitalcommons.calpoly.edu/theses/879.
Corrias, Maria Elena. "A statistical mechanics approach to cancer dynamics: a model for multiple myeloma bone disease." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2019. http://amslaurea.unibo.it/18021/.
Renner, Johan. "Towards Subject Specific Aortic Wall Shear Stress : a combined CFD and MRI approach." Doctoral thesis, Linköpings universitet, Mekanisk värmeteori och strömningslära, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-65910.
Venkatesan, Sreedhar, and Hanumantha Raju Hariprasad Banglore. "Probabilistic Analysis of Brake Noise : A Hierarchical Multi-fidelity Statistical Approach." Thesis, Linköpings universitet, Mekanik och hållfasthetslära, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-151009.
Computer Aided Engineering (cae) driven analysis is gaining grounds in automotive industry. Brake noise is one such place where cae simulations are gaining more attention. The presence of several uncertain parameters which affect brake noises and also the lack of basic understanding about brake noise, makes it difficult to make reliable decisions based on cae deterministic analyses alone.Therefore, the confidence level in cae analyses has to be increased to ensure cae analysis robustness. One way to achieve this is by incorporating the effects of different sources of uncertainty and variability in the cae analysis and estimating the probability of design failure. Such a reliability measure (i.e. probability of noise event occurrence or exceedance of noise level than a threshold) can provide car manufacturers with an idea about the costs of warranty claims due to brake noise and can be used as a metric to evaluate different design solutions, before the final design goes to the production stage. On one hand, using the high-fidelity models of brake/chassis system is generally computationally intensive, and thus, often only limited number of simula-tion runs are feasible for uncertainty analysis and design failure risk assessment. On the other hand, analyses on low-fidelity models, typically based on simplified assumptions during the development phase are fast but not always accu-rate. Striking for a good balance between efficiency and accuracy/robustness is an important task, when dealing with uncertainty/risk analysis of such complex dynamical systems To address these issues, a hierarchical multi-fidelity statistical approach has been adopted in this study, in order to estimate the probability of design failure. It employs a hierarchy of approximations to the system response computed with different fidelity by surrogate modelling, coarse spatial/temporal model mesh resolution variation, changing solver time step, etc., using probability theory, to relate information provided by approximate solu-tions to the target failure estimation. Using this approach opens up the possi-bility to use a low-fidelity models to accelerate the uncertainty quantification of complex brake/chassis systems, while granting unbiased estimation of system design failure risk/reliability. It also enables management of design changes, during fast iterations of the design process. This approach is used for studying one of the brake noise issue called creep groan, understand the root cause and providedesign proposals.
Rogal, Jutta. "Stability, composition and function of palladium surfaces in oxidizing environments a first principles statistical mechanics approach /." kostenfrei, 2006. http://www.diss.fu-berlin.de/2006/535/index.html.
Nehring, Benjamin [Verfasser], and Sylvie [Akademischer Betreuer] Roelly. "Point processes in statistical mechanics : a cluster expansion approach [[Elektronische Ressource]] / Benjamin Nehring. Betreuer: Sylvie Roelly." Potsdam : Universitätsbibliothek der Universität Potsdam, 2012. http://d-nb.info/1028397100/34.
Nanavati, Hemant. "Molecular modeling of the elastic and photoelastic properties of crosslinked polymer networks: a statistical segment approach / by Hemant Nanavati." Diss., Georgia Institute of Technology, 1998. http://hdl.handle.net/1853/8227.
Kanit, Toufik. "Notion of representative volume element for heterogeneous materials: statistical and numerical approach." Phd thesis, École Nationale Supérieure des Mines de Paris, 2003. http://tel.archives-ouvertes.fr/tel-00005751.
Nakayama, Yasuya. "Statistical physics approach to strongly correlated fluctuations and its application to fluid turbulence and heart rate variability." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148496.
Lymperiadis, Alexandros. "SAFT-γ : a group contribution approach based on a heteronuclear version of the Statistical Associating Fluid Theory." Thesis, Imperial College London, 2008. http://hdl.handle.net/10044/1/11377.
Hohenegger, Christel. "Small Scale Stochastic Dynamics For Particle Image Velocimetry Applications." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/10464.
Abu-Rahmeh, Osama. "A statistical mechanics approach for an effective, scalable, and reliable distributed load balancing scheme for grid networks." Thesis, Liverpool John Moores University, 2009. http://researchonline.ljmu.ac.uk/5903/.
Faleye, S. "Evaluating the effect of learning fluid mechanics through the CCAILM learning approach in some South African universities." Journal for New Generation Sciences, Vol 9, Issue 1: Central University of Technology, Free State, Bloemfontein, 2011. http://hdl.handle.net/11462/577.
The need to increase the number of quality engineering graduates, graduating from South African Universities, informed this study. Based on the findings from the baseline study, conducted prior to the present study, this research seeks to evaluate (using a static, non-equivalent, group design) the effect of Constructionist Computer-Aided Instructional Learning Model (CCAILM) approach, used in some South African Universities, for studying fluid mechanics in mechanical engineering classes. This new learning model is derived from constructionist learning theory, media-affects-learning hypothesis and multiple representation principle. The results of the data analysis indicate that CCAILM learning approach enhances the learning of fluid mechanics in mechanical engineering classes.
Diaz, simoes Juan Raphael. "A mathematical approach to embryonic morphogenesis based on spatio-temporal cell lineages." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX065/document.
This thesis approaches morphogenetic processes in the early embryogenesis of verte-brates through the mathematical and physical study of spatio-temporal cell lineagesreconstructed from in vivo 3D+time images. Our methodology is based on a complexsystems representation of the embryo, with the interaction between levels of organiza-tion and the formal analysis of cell displacements in space and time. We designed andimplemented an original methodology to identify in cell lineages the formation of com-partments in consistency with anatomical landmarks and the organization of presump-tive organs. In addition, we proposed a strategy to infer the underlying biomechanicalforces. We also delivered a user-friendly computer interface, first deployed for usingour methodology but also designed to be extensible and versatile, which aims to bea common ground for biologists, mathematicians, physicists and computer scientistsinvestigating morphogenetic processes in living systems
Yan, Yujie yy. "A General Approach to Buhlmann Credibility Theory." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1011812/.
Skoog, Erik. "CFD Annular Flow Modelling Based on a Three-Field Approach." Thesis, Luleå tekniska universitet, Institutionen för teknikvetenskap och matematik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-80165.
Zaid, Irwin Morton. "Non-Gaussian fluctuations in active suspensions." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:8ed73f05-9d88-4de8-91c5-1d944ad9004a.
Wilde, Daniel G. "Validation of a CFD Approach for Gas Turbine Internal Cooling Passage Heat Transfer Prediction." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1384.
Krometis, Justin. "A Bayesian Approach to Estimating Background Flows from a Passive Scalar." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/83783.
Ph. D.
Martin, David Stewart. "An Investigation of Avian Wing Tip Vortex Generation Using a Biomimetic Approach." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1734.